Armstrong (Westinghouse Elec), June 2 1925, 455/336 - two tube adjustable Super Regenerative. Transistors, either bipolar or JFETs are used in regenerative receivers today. Although the superheterodyne receiver is the most common receiver in use today, the regenerative radio made the. It may not be a Hi-Fi receiver, but very easy build for sure. Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. Chappy Happy 28,296 views. The right-side tube is audio. Please practice hand-washing and social distancing, and check out our resources for adapting to these times. All Product Information Customer Q&A's Customer. It consists of an amplifying vacuum tube or transistor with its output connected to its input through a feedback loop, providing positive feedback. The radio is a regenerative receiver using a combination triode-pentode tube (which is like having two tubes in one, so I guess this is actually a two tube radio?). 5 MHz Audio output: Headphone level only with diode audio limiters for listener safety Power supply: 2. loctal regenerative receiver See more. Addeddate 2018-10-13 21:13:37 Coverleaf 0. Some Regenerative Receivers. I began to understand that my 100 milliwatt transmitter might easily end up. A 2000 ohm headset or an audio amplifier is required. As can be seen in the schematic diagram in figure. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. The regenerative detector uses a field effect transistor (FET). Uses a 00A tube and low voltage. The regenerative circuit (or regen) allows an electronic signal to be amplified many times by the same active device. 1/10/2015 0 Comments A few weeks ago I started work on building a one tube regenerative receiver based on a circuit described in an old book called "The Boy's First Book of Radio and Electronics". It is mounted just below/left of the RF tube. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. Old Time "Interflex" Radio Receiver JPG Files. Regenerative Receiver in Electronics Now. By Al Klase. Can replace the 30's with 1H4's. The 6U8A tube includes a triode and a pentode in one 9 pin envelope. "Regenerative Receivers: Past And Present", Communications Quarterly. A 12-Volt Homebrew Regen. My 12L6 regen set is a standard design. The next item on the list was the regenerative detector. National; Chelsea, Boston MA, build 1924, 11 pictures, 1 tubes, United States of. 50 watchers. The 10 watt power level of the single 6AG7 is fine for an experienced operator but, again, the new novice would have looked forward to running the 75 watt "novice gallon". W1FB Doug DeMaw's Two-stage Regen from his Design Notebook - Unsuccessful. Most 6U8A regen designs use the pentode as the detector and the triode as an audio amp. "Ace" was a brand name of the Precision Equipment Company, which Crosley purchased in early 1923, in order to obtain their Armstrong patent. A 2000 ohm headset or an audio amplifier is required. The RadioBoard Forums. 7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. This Knight Ocean Hopper receiver from Allied Radio is a three tube regenerative set covering the broadcast band. This is a project I saw in an Elementary Electronics magazine back in 1967. Paperback: 127 pages Publisher: Lindsay Publications Inc; 1 edition (1997) Language: English ISBN-10: 1559182024 ISBN-13: 978-1559182027 Package Dimensions: 8. 12AU7 REGEN' RECEIVER USING 12 VOLT HT SUPPLY Inspired by the references below, this is my build of the design described by John Hunter on his website (Ref 1), and Peter Parker in his youtube video's (Ref's 2 & 3). About A 12-Volt Homebrew Regen The resource is currently listed in dxzone. Regenerative sets are a pretty common approach to a one tube radio design. A regen set is usually operated near or at the point of oscillation. L1 provides negative mutual inductance between the two tuned circuits to maintain a constant bandwidth of approximately 12KHz across the entire 530 to 1700KHz. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. The receiver, dubbed 'The Moorabbin', is a two transistor regenerative receiver of conventional design. A minimal antenna length would be about 6 feet, 15 feet would be a maximum. The three coils, two Deforest - one unknown, all have continuity and are type 75. One Tube Regenerative Radio Project From Radio Craft Magazine, March 1935: A "Distance Getter" -for a $1 "Build me the simplest possible radio receiver," was the order that came down the line from the Big Chief, who continues, "Just imagine yourself. This was a project that grew out of my fondness for antique radios and vacuum tube technology. The regenerative stage is first, followed by a transformer coupled audio amplifier stage. The receiver tunes the entire 30m band (10100-10150) and performs quite well. 3-7MHZ / 6-18MHZ Metal Casing Bass Tremble 4-inch Speaker _ {categoryName} - AliExpress Mobile Version -. ) The authors are listed as Fred Roden and Glenn A. I have not yet built this receiver, but intend to do so ASAP. Since there are really two valves in one glass envelope, the set is really a two-valve receiver. A New York amateur by the name of Edwin H. Here is the schematic for the regen I made using the 1625. The advantages in size, weight and efficiency are well known. Armstrong conducted a thorough investigation of the principles of operation of the new three-electrode tube that the technological jump took place. LM386 Regen Demo by W9RAN - Duration: 4:50. Just start with a larger tickler and peel off turns. Regenerative Receivers - Surplus Frequency Meter Becomes Regen - a very interesting project. After visiting a number of WWII museums in Normandy this summer I was inspired to build a radio receiver with the same technology and design as those used by the spies and the resistance during the French occupation. So much for a one-tube transmitter. The receivers of Figs. A 1948 era One Tube Regen, using a 6SN7 This site by Gary Johanson, WD4NKA, contains a number of interesting projects besides the regen, which is Project #1 on the page The AA8V Twinplex Regenerative Receiver (uses 6SN7s). Tube: Radiotron UX200 (detector) in original carton. Building an early 1930s-style 2 tube Regenerative Receiver. Homebrew Radio ex-Silicon Tagged: homebrew radio Regenerative Radio (before Battery Powered Tube Homebrew Shortwave 12bl6 One Tube Regen Radio Receiver Auctions - Buy And Sell - FindTarget Auctions Regenerative radio using one Tagged: ham-radio vacuum tubes 2 tube shortwave radio:. The "One Tube FM Tuner" described in Popular Electronics, August 1960 is about the simplest valve receiver for reception of the 88-108Mc/s FM broadcast band. It offers the super-regenerative + super-heteroyne type. ) The authors are listed as Fred Roden and Glenn A. A 'Universal' Regenerative Detector that receives AM, SW, or FM! Oct 30, 2004 by Rick Andersen Here is an amazingly versatile circuit-- look closely and you'll see that it's really the same detector found in my article on the Superregen for FM VHF Aircraft. One Tube FM Super Regen Receiver - 12BH7A 12V DC Radio - Duration: 4:05. R3/C5 are a "grid leak" arrangement that (together. 5 for B battery. A D cell and five 9V transistor batteries wired in series will work to power this radio. Triodes are the original detectors. 5mH Var Capacitor. Schematic only. Ham Radio Equipment Dj Equipment Radio Design Antique Radio Electronics Gadgets Audiophile Mason Jars Tube Product Launch. Seventy-five years ago this month, the July 1942 issue of Popular Mechanics carried the plans for this simple one-tube regenerative receiver. When I take this guy to the Hamfests and operate it on my swap table, I always draw a crowd with it. Kit available for $250. The QRPGuys K8TND Regenerative Receiver covers the 60, 49, 41, 31, 25 meter shortwave bands (approximately 4. By 1933 the arch-typical amateur set-up boasted a National SW-3, or reasonable facimile therof, and a curtain-rod Hartley feeding an off-center fed Zepplin wire. So much for a one-tube transmitter. This is not the circuit you are thinking of but the Fremodyne is a one tube superhet. I have not yet built this receiver, but intend to do so ASAP. Chelsea 1-tube Regenerative Receiver Model 110 Radio Chelsea Radio Corp. October 2006 - How I build my Radio Circuits-- "Ugly Construction" Over a. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodyne's superior performance and the falling cost of tubes. A premier site for antique radio collectors featuring articles, and tips on restoration and troubleshooting. I did make the suggestion that one cold use a small cap paralled across the first 300pf for the same purpose. Free shipping on many items 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300/201A. IT WAS CALLED THE 'IVY CARRIER WAVE RECEIVER' AND WE THINK, DESIGNED BY TOMMY IVES. 15 watching. Tube: 12BA6 Heater and B+ Voltage: 12V DC Frequency Coverage: 5. Regenerative sets are a pretty common approach to a one tube radio design. " The parts list and some of the pictorials call for a "2. A one tube regenerative receiver using a loctal type tube. TUBES, Tube Radios, Tube Theory, Tube Guitar Amps, Tube Manuals, TUBE Videos, Tube Basics, Tube PDF's, ELECTRON TUBE THEORY, TUBE AMPLIFIERS, GUITAR AMPS, TUBE RADIOS, TUBE ELECTRONICS, 5 TUBE RADIOS, TUBE RECTIFIERS, TRIODE TUBES, TETRODE TUBES, PENTODE TUBES, TUBE BIASING, TUBE TRANSMITTERS. This link is listed in our web site directory since Thursday Apr 26 2012, and till today "A 12-Volt Homebrew Regen" has been followed for a total of 2706 times. Low plate voltage too. Armstrong applied in 1913 for a patent on the regenerative receiver, one of the most famous radio inventions, maintaining a long. By 1933 the arch-typical amateur set-up boasted a National SW-3, or reasonable facimile therof, and a curtain-rod Hartley feeding an off-center fed Zepplin wire. List - Gives frequencies used in many tube radios. This is the "Improved" version that came out in the publications several months after the original Cockaday circuit. Transistors, either bipolar or JFETs are used in regenerative receivers today. 12AU7 REGEN' RECEIVER USING 12 VOLT HT SUPPLY Inspired by the references below, this is my build of the design described by John Hunter on his website (Ref 1), and Peter Parker in his youtube video's (Ref's 2 & 3). Saved from youtube. My 12L6 regen set is a standard design. The 12AT7 Regen. The tube gain will determine the tickler coil composition and how much feedback you will need. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. In other words, a keyed oscillator that sounds good puts out little or no useful RF power. This receiver looked like the answer to my wishes. The internet is amazing! Ado_PO: One Tube Regenerative Radio: Monday, September 28, 2009 4:11:11 PM. 1 mm jack for external 12v input or 9v on board battery. "Ace" was a brand name of the Precision Equipment Company, which Crosley purchased in early 1923, in order to obtain their Armstrong patent. Appears to be a three coil regenerative receiver built with some very nice parts, faceplate and cabinet - but has not been tested. Armstrong applied in 1913 for a patent on the regenerative receiver, one of the most famous radio inventions, maintaining a long. 5 V DC for the filaments and 45V DC for the plate current. "Ace" was a brand name of the Precision Equipment Company, which Crosley purchased in early 1923, in order to obtain their Armstrong patent. Regenerative: 17. This radio kit will cover the AM radio band along with the SW radio band. Here is a picture of the front of my second tube regenerative receiver. Five plug-in coils sold separately increase the coverage from 165 KHz to 35 MHz. Ever since I was a kid huddled in front of an old console radio my grandmother gave me, I've been fascinated with the notion of listening broadcasts originating half-way around the world. Shortly after inventing the regenerative receiver, Armstrong started working on the superheterodyne receiver which replaced the TRF radios for broadcast receivers around 1930. one of the first radio control super-regenerative model control receivers is shown below. I did find such an article online called "Build the Cyclops" which seemed to be exactly what he was looking for. Regen Receiver Project. Regenerative receiver history. The voltages required were different although. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. Like with the better valve designs, feedback is controlled by a variable capacitor. Although I built one from a kit (4-States QRP) as my first electronics project a couple years ago I thought I'd go for the real deal and build a vacuum tube regen receiver. Wagner, and it reports. One Tube Wallop, page 1 One Tube Wallop, page 2 One Tube Wallop, page 3 One Tube Wallop, page 4 One Tube Wallop, circuit only. It provides good general-coverage reception of the. I included some notes there, most notably the resistor value to adjust for different coils. A premier site for antique radio collectors featuring articles, and tips on restoration and troubleshooting. The main advantage of the regenerative radio is that a complete receiver could be implemented with a single vacuum tube (using headphones and battery power). The most used spy radio transceiver during WWIII was the "Paraset" which used a regenerative two-tube receiver, one tube for the detector and the other for audio amplifying. It was made to match the 2-Step Amp. LM386 Regen Demo by W9RAN - Duration: 4:50. Charles Kitchin has written many articles about regen radios for QST and other hobby magazines. The information on this site is updated hourly, so if you are interested in one-tube radios for sale, bookmark this site so you can visit often. camp, he came into the possession of a 1-tube regenerative radio receiver improvised by an officer of the Engineer Corps, Capt. the KI3U radio is usually configured as one form or another of one-tube regenerative receiver, or a self-quenched super-regenerative - vacuum tubes were still expensive items in 1925 and many radio amateurs back then possessed at most two with appreciable life left in them, one for their receiver, the other for their transmitter. Regenerative receivers have a long history in radio dating back to the first days of the vacuum tube. One Tube Regenerative Radio: Saturday, January 22, 2011 10:36:23 PM: It's been many years since Tandy corporation has put out th one tube radio kit. Hi Richard. Complete Details Before you buy, download the manual (1. one tube is a # 31 and I believe it is an amplifier tube the other tube I cannot read. 5 for B battery. Building Notes for Tube Type Regenerative Radios by Dave…. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to its superior performance and the falling cost of tubes. Tube Regenerative Receiver Inspired by an old movie I saw one late night, I thought I'd have a crack at building something with tubes (this was my first tube project). Armstrong (Westinghouse Elec), Dec 21 1926, 375/338 -. Ham Radio Equipment Tube Crystal Electronics History Classic Vintage Historia Krystal. That was exciting. One Tube Direct Conversion Receiver With the regen set at a modest level, the operation was as described. "Instruction for Operating 'Grebe Radio' Radio Receiving Insrruments" gives operating instructions and circuit diagrams for types CR-3, CR-5, CR-8, CR-9 and for use of the CR-3-RORD and CR-8-RORK combinations. Easy switch coils for Shortwave to AM by just removing coil and plugging in desired coil. A tendency to overload was one of the biggest drawbacks to the simple regen receiver design. Constructed from re-cycled componentry. It is mounted just below/left of the RF tube. The tube gain will determine the tickler coil composition and how much feedback you will need. of one tube, filled the needs of the growing radio community and immediately thrived. By Al Klase. Using the radio is a real joy with the warm glow of the tube, and fine tuning adjustments. 1 MHz to 10+ MHz Receiver sensitivity: -130 dBm or 0. Wagner, and it reports. National; Chelsea, Boston MA, build 1924, 11 pictures, 1 tubes, United States of. And most important, watch the videos that MIKROWAVE1 has uploaded. It is my first attempt at building a one-tube regenerative receiver and it works pretty well on AM and CW. Its single amplifying tube,. The circuit itself is a very straightforward regenerative receiver covering the broadcast band. " As soon as I saw the article, I knew I. It uses a 1S4 tube with three 9 volt batteries for plate, and two 1. Triodes are the original detectors. Regenerative: 17. However, the modern superheterodyne (superhet for short) can be built as a one tube radio as well. I have a set of four "Octo" coils from the 1930's that cover 200 to 16m. "Instruction for Operating 'Grebe Radio' Radio Receiving Insrruments" gives operating instructions and circuit diagrams for types CR-3, CR-5, CR-8, CR-9 and for use of the CR-3-RORD and CR-8-RORK combinations. Over a decade of homebrew tube radios, and much excellent material on regens. Chelsea 1-tube Regenerative Receiver Model 110 Radio Chelsea Radio Corp. This is a project I saw in an Elementary Electronics magazine back in 1967. It uses high impedence headphones. This is one of the best space-charge receiver circuits out there: A 12U7 dual triode provides an RF amp followed by a regenerative detector, and a 12AL8 triode-pentode provides two stages of audio amplification into 600 ohm headphones. 50 Ever since we started mak- ing radio apparatus it has been our fixed policy to offer to the public the best possible receiv- ers at the lowest possible cost -. Although the first one uses a crystal detector and the second one a 3 -element vacuum tube, both are in the same category and. IGEN MAX - Two Tube Regenerative Radio Kit with Varactor Tuning & Plug-In Coils - $46. "Regenerative Receivers: Past And Present", Communications Quarterly. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. The Ferrite Fox definitely outperforms it but has the equivalent of MANY transistors at. It offers the super-regenerative + super-heteroyne type. Super-regenerative receiver. 1472092 Receiver for Wireless Telegraphy, RCA, Oct 30 1923, 455/286; 455/290; 455/312; 455/315 1539821 Wave Signaling System, E. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. The internet is amazing! Ado_PO: One Tube Regenerative Radio: Monday, September 28, 2009 4:11:11 PM. The main advantage of the regenerative radio is that a complete receiver could be implemented with a single vacuum tube (using headphones and battery power). Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). I have not yet built this receiver, but intend to do so ASAP. 5 for B battery. Many of the popular electronics magazines at the time, including my favorite, Practical Wireless, carried advertisements from a company called H. a few years ago, i stumbled on an unusual regenerative design that operated on 12 volts — not the 100 or more of conventional tube designs. One of the perennial favorites among radio construction projects is the one-tube battery-powered regenerative receiver. 0: 6SN7: 39: 40 Meter Regenerative Receiver [In Spanish]. Price: $295. I have also tuned some other frequencies to receive the Radio Havana Cuba signal. That is the 20 pF trimmer capacitor across the coil. Folkscanomy Electronics Articles: One-Tube Regenerative Receiver. You can probably guess that I'm a big fan of Alfred Morgan's series of books such as:. There was a problem completing your request. One triode is used a regenerative detector, the other as an audio voltage amplifier, and the pentode as an audio power amplifier. IT WAS CALLED THE 'IVY CARRIER WAVE RECEIVER' AND WE THINK, DESIGNED BY TOMMY IVES. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. The regen still makes a great contest radio. A 15pf cap couples the preamp to the regen stage. One Tube Regen Receiver. Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. Of course I had several ways I could go if I built a regenerative receiver into this. 7 Doerle Single Tube Super-Regenerative 70 Radio Receiver 8 IC Shortwave Radio Receiver 81 9 80/40 Meter Code Practice Receiver 94 10 WWV 10 MHz "Time-Code" Receiver 104 11 VHF Public Service Monitor 116 (Action-Band) Receiver 12 6 & 2-Meter Band Amateur 127 Radio Receiver 13 Active and Passive Aircraft Band 140 Receivers 14 VLF or Very Low. A little Goggling got me here to your blog. The regenerative radio receiver or, even super-regenerative radio receiver or, "regen" if you prefer, are basically oscillating detector receivers. One such feature is the capacitor coupling of the audio output. Regenerative radio receiver book. Super-regenerative receiver. Welcome to the One Compactron Receiver pages. The immediate precursor to the original Twinplex receiver appeared in 1934, as a DYI construction article in a radio…. 5 for B battery. A 1948 era One Tube Regen, using a 6SN7 This site by Gary Johanson, WD4NKA, contains a number of interesting projects besides the regen, which is Project #1 on the page The AA8V Twinplex Regenerative Receiver (uses 6SN7s). * A related problem is that, the better a keyed vacuum tube oscillator sounds, the less output power you will get from it. Since there are really two valves in one glass envelope, the set is really a two-valve receiver. The part count is low and the sensitivity is quite remarkable. The receiver tunes the entire 30m band (10100-10150) and performs quite well. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to its superior performance and the falling cost of tubes. Of course I had several ways I could go if I built a regenerative receiver into this. Radio detector circuits take a variety of forms. Low plate voltage too. So that settled it, this little box was going to be a regenerative receiver. 5 inches x 6. 1 MHz to 10+ MHz Receiver sensitivity: -130 dBm or 0. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. Got one to sell?. This Knight Ocean Hopper receiver from Allied Radio is a three tube regenerative set covering the broadcast band. The 6U8A tube includes a triode and a pentode in one 9 pin envelope. Brand: Crosley. i; r - Crosley Model 51 New Two -Tube Armstrong Regenerative Price Only $18. In 1934 a fascinating single-tube kit-form shortwave receiver was advertised in radio magazines. To my amazement, the radio worked on the first try so the next step was to find another TV tube that contains a rectifier and high gain triode in one package. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. Only 20 left in stock - order soon. The super-regenerative receiver is based upon the regenerative receiver shown in Figure 1, while both depend for their operation upon that property of the audion--the three-element vacuum tube--which enables it to reproduce very faithfully in greatly amplified form any feeble pulse of electrical energy which is fed into it. The 1-Tube Regenerative Kit is an up-grade "clone" of a very old kit that was available in the 50's. Ever since I was a kid huddled in front of an old console radio my grandmother gave me, I've been fascinated with the notion of listening broadcasts originating half-way around the world. 4-Regenerative circuit using the tuned plate method From the fundamental circuit of the simplest form, we have the circuit of a vacuum tube receiver as shown in Figure 2. So much for a one-tube transmitter. As time went on, other advances were made in tube technology, including the addition of an indirectly heated cathode and other grids. Tube: 12BA6 Heater and B+ Voltage: 12V DC Frequency Coverage: 5. Regulated voltage for Regenerative receiver project Mr. n 1951 I got a copy of Popular Mechanics Magazine and one issue had a plan for a 4 tube regenerative receiver. 1 Motivation The main motivation for using the super-regenerative receiver ( SRR ) is that it has simple architecture compared with other receivers. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. The triode section is used as a regenerative detector, and the pentode section (wired as a triode) is used as a stage of audio amplification. A one tube regenerative receiver using a loctal type tube. That is the record of the Radio Shop which has been swept from a tiny establishment in one room in the Bank of Italy to a large productive plant in Sunnyvale as a result of American's modern madness for "listening in". It uses a dual tube, half of it for transmitting, and the other half for a regenerative receiver. 4-Regenerative circuit using the tuned plate method From the fundamental circuit of the simplest form, we have the circuit of a vacuum tube receiver as shown in Figure 2. Got one to sell?. While regenerative sets are a pretty common approach to a one tube radio design, there are a number of design features that can make the set a great performer. 71 shipping. 1 mm jack for external 12v input or 9v on board battery. This turned out to be a great little one tube regenerative receiver. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. This is an assembled regenerative AM broadcast band receiver kit, developed and sold by Lance Borden. Low voltage (12vdc) two tube regen receiver using "space charge" technology before i go into the details, let me say that i've built about 1/2 dozen one and two tube regens over the years (and several superhets) and this one is by far the most selective, most stable, and easiest to use regen. Mitch Eaton Gadgeteria. List - Gives frequencies used in many tube radios. From many research, I decided to give a try on this one as a start. In other words, a keyed oscillator that sounds good puts out little or no useful RF power. That is the 20 pF trimmer capacitor across the coil. 1 mm jack for external 12v input or 9v on board battery. Shortly after inventing the regenerative receiver, Armstrong started working on the superheterodyne receiver which replaced the TRF radios for broadcast receivers around 1930. The book told hold to build a two stage regenerative receiver that used only one tube, just the sort of thing I was looking for. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. By late 1922, it had been updated with a bakelite panel and mahogany box. That is the 20 pF trimmer capacitor across the coil. This is probably the simplest radio receiver circuit that one could ever imagine of making. 06 of a amp, making it easy on the "A" battery which is a 1 1/2 volt "D" cell. Regenerative Receivers - Surplus Frequency Meter Becomes Regen - a very interesting project. Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). Overview {Invented by Armstrong in 1922 and widely used in vacuum tube circuits until the 1950's {It was replaced by the super-heterodyne receiver due to its poor selectivity and sensitivity {Pros:zSmall number of components allow for high integration zLow power zHigh energy efficiency {Cons zpoor sensitivity zpoor selectivity zlow data-rate zlimited demodulation capability. Resources listed under Regenerative Receiver category belongs to Receivers main collection, and get reviewed and rated by amateur radio operators. The antenna tuner has one small design quirk. 2 mb) #PO-105, $45. 5 volt batteries for filament. The two-tube regenerative receiver shown in Figure 1 is made from old radio parts of the 1930s and features a pair of #30 filament tubes with 3 volts on the filaments and a B+ supply of six 9-volt transistor radio batteries connected in series. Regenerative: 13. 5 MHz Audio output: Headphone level only with diode audio limiters for listener safety Power supply: 2. The receivers of Figs. Over a decade of homebrew tube radios, and much excellent material on regens. Low plate voltage too. I purchased the book (and I highly recommend it) and began work on the receiver. 5 thoughts on “ Regenerative Receiver from 1950 Boys Life Magazine ” Jon September 7, 2014 at 4:58 pm. I’ve mentioned before in posts how one of my first shortwave receivers as a teenager growing up in England (in fact, possibly the first) was a one tube battery-operated regen built from a kit. I did get my novice amateur radio license in 1954. Armstrong and patented in 1914. Introduction. Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination - SSB stability isn't great (it's poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. The regen radio was one of the many inventions in radio technology that was made by Edwin Armstrong. Some might argue that it is the best general purpose dual. Regenerative sets are a pretty common approach to a one tube radio design. Regenerative Receiver from 1950 Boys Life Magazine. One Tube FM Super Regen Receiver - 12BH7A 12V DC Radio - Duration: 4:05. Check here: Just one single 12AT7 tube! Typical application here: Cheers, Miguel. I have also tuned some other frequencies to receive the Radio Havana Cuba signal. com in a single category. The regenerative detector uses a field effect transistor (FET). It was made to match the 2-Step Amp. The main category is Regenerative Receiver that is about Regenerative Receiver. A little Goggling got me here to your blog. One of the reasons why super-regenerative receivers were so popular in the past was that a single device, e. to build is based on the "First Receiver for the Novice" (Aug 1951 QST). Regenerative: 17. 5mH Var Capacitor. A 1948 era One Tube Regen, using a 6SN7 This site by Gary Johanson, WD4NKA, contains a number of interesting projects besides the regen, which is Project #1 on the page The AA8V Twinplex Regenerative Receiver (uses 6SN7s). I thought it was the 1950 ARRL version until I noticed a variation. A regenerative detector is much more robust than any dual gate FET mixer, it is very sensitive to weak signals and it will demodulate AM in addition to single side band and Morse code. 5 for B battery. Back in the day, Radio had so called P Kits. Tube: 12BA6 Heater and B+ Voltage: 12V DC Frequency Coverage: 5. n 1951 I got a copy of Popular Mechanics Magazine and one issue had a plan for a 4 tube regenerative receiver. 0: 32,30 (2) 61: A 30's Style 3 Tube Regen Receiver: I like his prototype style; lots of jumpers. It will be supplied with a good, used 01A vacuum tube. In other words, a keyed oscillator that sounds good puts out little or no useful RF power. Regenerative Receiver in Electronics Now. The 6SN7 is larger and more rugged than the miniature dual triodes such as the 12AU7 and the 6CG7. 1942 One Tube "Beginner's Special" Receiver. Homebrew Two Tube Regenerative Radio. Regenerative receivers have a long history in radio dating back to the first days of the vacuum tube. I did get my novice amateur radio license in 1954. List - Gives frequencies used in many tube radios. I began to understand that my 100 milliwatt transmitter might easily end up. 5 volt batteries for filament. One Tube 12V DC Shortwave Regenerative Receiver. 5 V DC for the filaments and 45V DC for the plate current. Shortwave & AM One Tube Regen Receiver High quality receiver constructed by ebay seller Ace Radio. Low Voltage (12VDC) Two Tube Regen Receiver Using "Space Charge" Technology Before I go into the details, let me say that I've built about 1/2 dozen one and two tube Regens over the years (and several superhets) and this one is by far the most selective, most stable, and easiest to use Regen. The internet is amazing! Ado_PO: One Tube Regenerative Radio: Monday, September 28, 2009 4:11:11 PM. Most 6U8A regen designs use the pentode as the detector and the triode as an audio amp. Best one-tube design that I have encountered so far. As can be seen in the schematic diagram in figure. 5 thoughts on “ Regenerative Receiver from 1950 Boys Life Magazine ” Jon September 7, 2014 at 4:58 pm. Chelsea 1-tube Regenerative Receiver Model 110 Radio Chelsea Radio Corp. Addeddate 2018-10-13 21:13:37 Coverleaf 0 Identifier OneTubeRegenerativeReceiver Identifier-ark ark:/13960/t06x6n44t Ocr ABBYY FineReader 11. Many tears ago I got my ham license because a group I was with required communication on 2meter 440. Then he built a second one to verify the design, #61. Some Regenerative Receivers. Kit comes with wound oscillating coils and assembled front panels. Power for this receiver is 1. Regula-tor. Neophyte-One Tube Regenerative Receiver Post by EFTB » Sun Nov 20, 2011 10:08 pm I am looking for a construction project/article from the early 70's that appeared in one of the electronic hobbyist magazines of that time. A regenerative detector is much more robust than any dual gate FET mixer, it is very sensitive to weak signals and it will demodulate AM in addition to single side band and Morse code. One of these was a regen receiver (Science Fair brand Three Transistor Shortwave Radio (Catalog #28-110)) Great fun to listen to n the summer night - wire in the air and ground hooked to the outdoor faucet. Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination – SSB stability isn’t great (it’s poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. I already have a few simple tube radios that I bought at flea markets, so I will defer any tube projects for a while yet. Armstrong (Westinghouse Elec), June 2 1925, 455/336 - two tube adjustable Super Regenerative 1611848 Wireless Receiving system for Continuous Waves, E. The regen still makes a great contest radio. 5 MHz Audio output: Headphone level only with diode audio limiters for listener safety Power supply: 2. Ever since I was a kid huddled in front of an old console radio my grandmother gave me, I've been fascinated with the notion of listening broadcasts originating half-way around the world. Figure 1a: VLF-LF Receiver, Regenerative RF Section The single tuned circuit is made up of the paralleled sections of 3 gang tuning capacitor C8 and one of the switched inductors L3, L4, L5, or L6. The AA8V Twinplex Regenerative Receiver - 6SN7GTB General Information and 6SN7GTB Tube Data Sheets. The two-tube regenerative receiver shown in Figure 1 is made from old radio parts of the 1930s and features a pair of #30 filament tubes with 3 volts on the filaments and a B+ supply of six 9-volt transistor radio batteries connected in series. At the Brimfield Antique Show in Brimfield, MA several days ago, I found and bought a built up 6SN7 regen receiver. One Tube Regen Receiver. There are other annoyances such as the whistles and no real accurate frequency readout, such as what I have with my 1 Tube Superheterodyne Radio. List - Gives frequencies used in many tube radios. I suspect it will be quite a challenge to actually make a contact. This is probably the simplest radio receiver circuit that one could ever imagine of making. 5 for B battery. I found an interesting construction article for a one-tube regenerative receiver in the September 1950 issue of Boys Life magazine. A 1948 era One Tube Regen, using a 6SN7 This site by Gary Johanson, WD4NKA, contains a number of interesting projects besides the regen, which is Project #1 on the page The AA8V Twinplex Regenerative Receiver (uses 6SN7s). Fall 1995, pp 7-26. 5 V for A battery and 22. A REGENERATIVE RECEIVER FOR BEGINNERS A modern version of the classic re- generative receiver is shown in Fig 17. 22 thoughts on " Simple One-Chip Regenerative Receiver " DainBramage says: Sure I built one tube receivers and a few design around 602/612s but I thought this was a great repurpose of a chip. A regen set is usually operated near or at the point of oscillation. 0: 6088(3) 38: A one tube regenerative receiver: From 1950 ARRL Handbook: Regenerative: 17. It's a one-tube transmitter/receiver. Just start with a larger tickler and peel off turns. High Q Crystal Radio Basket Weave Coils With Regenerative Tickler Coil Electronic Vacuum Tube Super Regenerative FM Tube Radio. I have also tuned some other frequencies to receive the Radio Havana Cuba signal. For the "B" battery, I use three 9 volt batteries connected in series, giving 27 volts that is sufficient to operate the receiver. From many research, I decided to give a try on this one as a start. The Superheterodyne receiver uses many of the same components as the TRF and Regenerative receivers but adds special oscillator and amplifier circuits that make tuning into the desired station very easy. The Flat Top radio is a one tube shortwave regenerative receiver using the popular 1625 tube. Low-Voltage 2-Tube Regen Receiver. A two-transistor receiver for 80 meters. I've been playing with it a couple of days, and tonight I picked up a station in Salt Lake City UT, clear as a bell (KSL, listened to a Cougar game). In addition to the tube and plug-in coils, it includes a tuning capacitor, a variable resistor for the regeneration control, two fixed capacitors, one fixed resistor, and one RF choke. Get the best deals on Regenerative Radio when you shop the largest online selection at 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300. At the high end of the band, it was possible to turn up the regen quite a bit to get more RF gain, at the expense of audio stability. 12/03/2006 I couldn't resist making just a couple more changes. 1 Tube Wallop. 50 shipping. Since I was a budding amateur radio operator at the time, I needed a good receiver if I was ever going to get on the air. 30' of antenna, 80-year-old components (except the grid-leak, which is a cheat, I slipped a modern resistor into the glass tube). A 12-Volt Homebrew Regen. It uses the best features of many famous one tube sets and has features not found on most radios of its type. The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. One of these was a regen receiver (Science Fair brand Three Transistor Shortwave Radio (Catalog #28-110)) Great fun to listen to n the summer night - wire in the air and ground hooked to the outdoor faucet. Secondary winding 12 and capaci- tors C3 and C4 select the received sig- nal while tickler winding 1. This item:Two Tube Regenerative Radio DIY Kit $61. 1 uV (cw regen mode). So, some eight years later I took a stab at building another regen receiver. One triode is used a regenerative detector, the other as an audio voltage amplifier, and the pentode as an audio power amplifier. Complete Details Before you buy, download the manual (1. This neat little 1 tube antique regenerative radio project can be built from common materials. Stay safe and healthy. a few years ago, i stumbled on an unusual regenerative design that operated on 12 volts — not the 100 or more of conventional tube designs. If these experiments don't show the benefits of measurement, then I'm afraid nothing will. Though they were once very popular among amateurs and professionals alike, they are now thought of as mere play toys instead of legitimate receivers. A regen set is usually operated near or at the point of oscillation. Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination – SSB stability isn’t great (it’s poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodyne's superior performance and the falling cost of tubes. 0: 30,33: 62: Hear All Continents (HAC) One-Valve Regenerative: Towards the bottom of the page. 12AU7 REGEN' RECEIVER USING 12 VOLT HT SUPPLY Inspired by the references below, this is my build of the design described by John Hunter on his website (Ref 1), and Peter Parker in his youtube video's (Ref's 2 & 3). Super-regenerative receiver for short range HF band applications 3 1. Hi Richard. I had a brand new, black powder coat chassis that I had gotten at a hamfest years ago that would serve as the chassis. I began to understand that my 100 milliwatt transmitter might easily end up. One of these was a regen receiver (Science Fair brand Three Transistor Shortwave Radio (Catalog #28-110)) Great fun to listen to n the summer night - wire in the air and ground hooked to the outdoor faucet. The NRQ-62, Bruce Vaughan built 59 regen receivers prior to his Ultimate Regenerative Receiver, #60. A one tube regenerative receiver using a loctal type tube. Building Notes for Tube Type Regenerative Radios by Dave…. The "top" 1/2 is. Homebrew Two Tube Regenerative Radio. Price: $295. This radio kit will cover the AM radio band along with the SW radio band. The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. Page 1 Page 2 Page 3 Page 4 Page 5 Page 6: One-Tube Radio Can Be Mailed JPG File Page1: Miniature-Tube Set Works On Flashlight Cells JPG Files Page 1 Page 2 Page 3 "Roll Your Own". One of the reasons why super-regenerative receivers were so popular in the past was that a single device, e. Introduction. Super-regenerative receiver. A D cell and five 9V transistor batteries wired in series will work to power this radio. There is also an explanation of how the radio works, what the vacuum tube does, and how to operate the radio. Tubes Last forget Throw Away Technology. Free shipping on many items 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300/201A. Please try your search again later. That is the 20 pF trimmer capacitor across the coil. This is the "Improved" version that came out in the publications several months after the original Cockaday circuit. com in a single category. The author is also a short wave enthusiast and for some time used his family's Philips MW/SW vacuum tube radio. By 1933 the arch-typical amateur set-up boasted a National SW-3, or reasonable facimile therof, and a curtain-rod Hartley feeding an off-center fed Zepplin wire. The "One Tube FM Tuner" described in Popular Electronics, August 1960 is about the simplest valve receiver for reception of the 88-108Mc/s FM broadcast band. The Receivers I. 6 ounces Customer Reviews: Be the first to write a review Amazon Best Sellers Rank: #3,473,978 in Books (See Top 100 in Books). To my amazement, the radio worked on the first try so the next step was to find another TV tube that contains a rectifier and high gain triode in one package. One half of a 6AN8 tube serves as an RF amplifier and the other half as a regenerative receiver. 1/10/2015 0 Comments A few weeks ago I started work on building a one tube regenerative receiver based on a circuit described in an old book called "The Boy's First Book of Radio and Electronics". This turned out to be a great little one tube regenerative receiver. I was recently asked by a reader and amateur radio operator from Brazil if I had a circuit for a one tube receiver using a magic eye tube. 2 mb) #PO-105, $45. The tube gain will determine the tickler coil composition and how much feedback you will need. A minimal antenna length would be about 6 feet, 15 feet would be a maximum. This little radio is the distillation of many circuits for one tube sets that have appeared since Edwin Armstrong invented the regenerative circuit in 1912. 5 inches x 6. I did get my novice amateur radio license in 1954. I found this gentleman's version of a single tube regen, with a LM386 output. 7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. Andrew November 14, 2018 at 11:41 am. Power for this receiver is 1. The tuning cap for the notch filter was salvaged from a transistor radio. Aug 18, 2019 - High Performance Regenerative Receiver - Ham Radio DIY Projects - YouTube Alfred Morgan Tube Crystal Radio Knight Space Spanner. The Regen Receiver is beautiful in its simplicity. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. Hutchinson, who had built it of scrap parts and placed it inside a GI canteen. I am able to tune in stations from 600-1600 Khz, most US AM stations. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. Though they were once very popular among amateurs and professionals alike, they are now thought of as mere play toys instead of legitimate receivers. Tube: 12BA6 Heater and B+ Voltage: 12V DC Frequency Coverage: 5. But the set no longer worked. And most important, watch the videos that MIKROWAVE1 has uploaded. I have not yet built this receiver, but intend to do so ASAP. Introduction. Seventy-five years ago this month, the July 1942 issue of Popular Mechanics carried the plans for this simple one-tube regenerative receiver. Buy It Now +$38. Free shipping on many items 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300/201A. Tube Regenerative Receiver Inspired by an old movie I saw one late night, I thought I'd have a crack at building something with tubes (this was my first tube project). After searching around online, I found a 12AT7 based regen that seemed simple enough to build. But the set no longer worked. 0: 32,30 (2) 61: A 30's Style 3 Tube Regen Receiver: I like his prototype style; lots of jumpers. 5 V for A battery and 22. One of the later versions used the following layout:. First one tube, then two, then three, then four, and in the case of some broadcast receivers, six tubes were employed as the years went by. 20 shipping. As can be seen in the schematic diagram in figure. A 6SJ7 regenerative detector is followed by a 6SN7 dual triode providing two stages of audio amplification. High Q Crystal Radio Basket Weave Coils With Regenerative Tickler Coil Electronic Vacuum Tube Super Regenerative FM Tube Radio. However after constructing it, I was less than impressed. This project was designed and built by Charles Kitchin. 5 V DC for the filaments and 45V DC for the plate current. 0: 6SN7: 39: 40 Meter Regenerative Receiver [In Spanish]. I am able to tune in stations from 600-1600 Khz, most US AM stations. " The parts list and some of the pictorials call for a "2. Hutchinson, who had built it of scrap parts and placed it inside a GI canteen. Easy switch coils for Shortwave to AM by just removing coil and plugging in desired coil. Hutchinson, on being shifted out of the prison, left it with Gibson. and this being my first regenerative receiver, was no exception. The 6SN7 is larger and more rugged than the miniature dual triodes such as the 12AU7 and the 6CG7. One Tube Radios, Vacuum Tube Projects, Regenerative Receiver, Knight Knightkit, Space Spanner This page illustrates several of the vacuum tube projects that I've been recently working on. One of the reasons why super-regenerative receivers were so popular in the past was that a single device, e. I really began to learn something about radios and how amplifiers worked when, about age 13, I built the one tube regenerative receiver I will shortly describe. The regenerative circuit remained a favorite design for home-constructed shortwave broadcast radios and amateur receivers throughout the 1930s. While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA. Since I was a budding amateur radio operator at the time, I needed a good receiver if I was ever going to get on the air. The regen still makes a great contest radio. Complete Details Before you buy, download the manual (1. Sensitivity reduced a few dB at 3. Beginners and Experts Welcome! and a vacuum tube based regen at that !! Bottom line the Ferrite Phoenix is a very capable receiver, considering it consists of only one tube. Single Tube Regenerative Receiver Frantisek Sukup Elektronika Tube AM/SW Radio Little 7 Tubes 3 Bands Radio MW 535-1605 KHZ SW 2. Crystal-Tube Receiver From Junk-Box Parts for Beginners Page 1 Page 2. 12-Volt One-tube Reflex AM-BCB Receiver The signals from the antenna pass through a double-tuned band-pass filter consisting of T1 and T2 tuned by a dual-section variable capacitor. 5 inches x 6. The Ferrite Fox definitely outperforms it but has the equivalent of MANY transistors at. 0 MHz Music: MusMus http. Have a question? Find answers in product info, Q&As, reviews. A 2000 ohm headset or an audio amplifier is required. Dual band receiver > Lower Band: Roughly 3. This is an assembled regenerative AM broadcast band receiver kit, developed and sold by Lance Borden. I have also tuned some other frequencies to receive the Radio Havana Cuba signal. You connect the receiver to a simple wire antenna, that can be a simple wire in the attic, or one thrown up in a tree. I was a bit turned off at the thought of having to build a 90-250V DC supply (or lots of 9v batteries) just to experiment, so I took a look at the tube data available online. Just start with a larger tickler and peel off turns. Plug-in coils containing primary (L1), secondary (L2), and tickler (L3) windings determine the frequency range. The Circuit. There was a problem completing your request. Feb 20, 2018 - One Tube 12V DC Shortwave Regen Receiver - SW Tube Radio DIY - YouTube. 1 MHz to 10+ MHz Receiver sensitivity: -130 dBm or 0. In this pamphlet, along with the instructions to assemble the kit, are a brief history of the vacuum tube, early radio development and notes on Edwin Armstrong and his invention of the regenerative radio receiver. Then he built a second one to verify the design, #61. Super-regenerative receiver for short range HF band applications 3 1. Homebrew Radio ex-Silicon Tagged: homebrew radio Regenerative Radio (before Battery Powered Tube Homebrew Shortwave 12bl6 One Tube Regen Radio Receiver Auctions - Buy And Sell - FindTarget Auctions Regenerative radio using one Tagged: ham-radio vacuum tubes 2 tube shortwave radio:. A New York amateur by the name of Edwin H. I have also tuned some other frequencies to receive the Radio Havana Cuba signal. 1 mm jack for external 12v input or 9v on board battery. In 1934 a fascinating single-tube kit-form shortwave receiver was advertised in radio magazines. Arnaldo Coro Antich Sent: Friday, January 02, 2004 8:19 PM Subject: Re: Amended Schematic No mistake, in the version I am running right now the double stack pot takes care of fine regen control. The Circuit. There is a lot of leeway here. It provides good general-coverage reception of the. Here are some links to web pages with regenerative receiver circuits I find interesting for any one of several reasons General sources on homebrew receivers Dave's Homemade Tube Radios by Dave Schmarder, N2DS. Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. It uses home wound coils to cover both 80 and 40 meters. The Superheterodyne receiver uses many of the same components as the TRF and Regenerative receivers but adds special oscillator and amplifier circuits that make tuning into the desired station very easy. iGen-Max Two Tube Regenerative Radio Kit ! (Version 4 - New for Jan 2014) Tube regenerative receiver based on original 1930's design, with a modern twist, Varactor tuning and a solid state audio amplifier. It uses a 3S4 vacuum tube and requires a long wire antenna and ground connection to operate. The OTers all think its a regular regenerative TRF receiver, and when I tell them it's a 20m receiver, they all want to hear it. It uses a 1S4 tube with three 9 volt batteries for plate, and two 1. Sensitivity reduced a few dB at 3. However after constructing it, I was less than impressed. I included some notes there, most notably the resistor value to adjust for different coils. Overview {Invented by Armstrong in 1922 and widely used in vacuum tube circuits until the 1950's {It was replaced by the super-heterodyne receiver due to its poor selectivity and sensitivity {Pros:zSmall number of components allow for high integration zLow power zHigh energy efficiency {Cons zpoor sensitivity zpoor selectivity zlow data-rate zlimited demodulation capability. This project was designed and built by Charles Kitchin. The 1-Tube Regenerative Kit is an up-grade "clone" of a very old kit that was available in the 50's. Tube Regenerative Receiver Inspired by an old movie I saw one late night, I thought I'd have a crack at building something with tubes (this was my first tube project). This one has the ability to receive both standard AM broadcast band and a part of the shortwave spectrum depending on the position of the band select switch. Hutchinson, on being shifted out of the prison, left it with Gibson. One Tube Wallop, page 1 One Tube Wallop, page 2 One Tube Wallop, page 3 One Tube Wallop, page 4 One Tube Wallop, circuit only. Resources listed under Regenerative Receiver category belongs to Receivers main collection, and get reviewed and rated by amateur radio operators. A New York amateur by the name of Edwin H. This radio kit will cover the AM radio band along with the SW radio band. Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. Here is a picture of the front of my second tube regenerative receiver. Regenerative receiver projects Lemon Drops. The receiver employs a common 1T4 Pentode tube that is still cheap and easily obtainable. Some Regenerative Receivers. Armstrong Regenerative Radio Receiver DIY Tube Socket Choke 2. Its single amplifying tube,. This is the later version of the Ace V. FA: ALLIED KNIGHT SPAN MASTER TUBE REGENERATIVE SW RECEIVER. Armstrong (Westinghouse Elec), June 2 1925, 455/336 - two tube adjustable Super Regenerative. 1 Tube Wallop. Sensitivity reduced a few dB at 3. As time went on, other advances were made in tube technology, including the addition of an indirectly heated cathode and other grids. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodyne's superior performance and the falling cost of tubes. List - Gives frequencies used in many tube radios. Crystal-Tube Receiver From Junk-Box Parts for Beginners Page 1 Page 2. Please practice hand-washing and social distancing, and check out our resources for adapting to these times. An illustration of the front of the radio appears on the front cover of our "1934 Shortwave Manual" while the rear of the radio appears on Rock's "Secrets of Homebuilt. The regen radio was one of the many inventions in radio technology that was made by Edwin Armstrong. Of course I had several ways I could go if I built a regenerative receiver into this. Complete Details Before you buy, download the manual (1. Doug N0WVA has the goal of building a complete (and usable) station with just 2 active devices, and he's halfway there, having come up with a regen receiver that works well on SSB and CW, contains just one active device, and has a total of just 9 parts including the coil. The cathode RFC is clearly visible above the tube socket. Beginners and Experts Welcome! and a vacuum tube based regen at that !! Bottom line the Ferrite Phoenix is a very capable receiver, considering it consists of only one tube. 12-Volt One-tube Reflex AM-BCB Receiver The signals from the antenna pass through a double-tuned band-pass filter consisting of T1 and T2 tuned by a dual-section variable capacitor. Transistors, either bipolar or JFETs are used in regenerative receivers today. Small changes in temperature or supply voltage can affect the set's tuned circuit, causing frequency shift in the set. I can't find the article at the moment.