Simple regenerative receiver. behavior of the .
Simple regenerative receiver. Mar 7, 2025 · WD5HOH Regenerative (Regen) Receiver This web page describes a small, single tuned circuit regenerative receiver primarily for daylight reception in the 16, 19, 22 and 25 meter international shortwave broadcast bands. If we do not need regeneration, the additional winding can be short-circuited with the jumper JP1. The regenerative radio receiver or, even super-regenerative radio receiver or, "regen" if you prefer, are basically oscillating detector receivers. 7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. This document provides instructions for building a simple regenerative radio receiver with a single FET and low component count. It was housed in a repurposed metal Christmas cookie container. Feedback: QST September 2001, p. Notes I found this design for a 3 Transistor Short Wave Radio by netZener. Regenerative receivers use a special type of detector that is essentially a user-controlled oscillator. Problems with the Regenerative Receiver Despite its fantastically clever design, the regenerative receiver lost out to other receiver topologies in the 1930s. The author had mentioned that the design was based on the "FreModyne"; a simple super-regenerative superhet receiver which the editor had seen reference to in a late 1940's electronics magazine from the U. Urmston Regen Receiver £32. The regenerative receiver reflexed Minimizing the power consumption of the receiver The receiver, is already battery-friendly, since it is a reflexed regenerative design with discrete transistors. 6). The receiver design contains a squelch circuit. It is a restoration and update of an old Science Fair #28-110 kit from Radio Shack. Nov 4, 2024 · The regenerative radio is long-ago superseded in commercial receivers, but it remains a common project for electronics or radio enthusiasts seeking to make a simple receiver. 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. This is another quality project from Charles Kitchin. Reviews For: QRPKITS Scout Regen Receiver Category: Receivers: General Coverage eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. It is impossible. They excel at receiving amplitude modulated signals from below the AM broadcast band up to the higher short-wave bands above which the superregenerative detector becomes the better choice. Positive RF feedback is used to increase the RF gain of the amplifier upto and beyond self-oscillation. ” It used a single tube and a handful of other components. Jan 1, 2021 · Simple Regenerative Receiver For The 40m Amateur Radio Band DX Explorer 8. The receiver hears lots of good signals on 40m in the CW or SSB modes and the reception of AM signals is adequate with the stronger stations. [3] A simple regenerative receiver Building simple regenerative receivers is a lot of fun and, best of all, it won't break the bank. The name was more recently coined by Gary, WD4NKA who is probably the main (current) exponent of this design. After some experimenting with the "large" receiver, it turned out that tuning and regeneration are just The Regenerative receiver has since become the most popular basic receiver for Amateur Radio Operators and Electronics experimenters worldwide. This receiver uses a 2N4416 JFET (orJ31()), which provides a more sensitive detector than an MPF102. html Apr 24, 2017 · Hackaday recently had a post called “ Everyone Should Build at Least One Regenerative Receiver “. A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noise-limiting and agc action and, freedom from overloading and spurious responses. Taking this design, I worked closely with a couple of Boy Scouts in the neighborhood who showed some interest in my "radio stuff", and we together constructed the Regen Shortwave Receiver using Manhattan-style ugly Simple transistor receivers and converters for HF A page of videos (normally with circuits) describing and demonstrating simple receivers for shortwave broadcast and amateur bands. Explore the fundamentals of regenerative receivers, the unique characteristics of the 1E7G, and the intricacies of building and tuning a functional circuit. The principle of operation is simple. JFET Q2 operates as a tickler feedback or Armstrong regenerative detector cir- cuit. The Sputnik regenerative receiver is a compact and efficient project for amateur radio enthusiasts, tailored to the 40m band and adaptable for other HF bands. The following is a design for a separately quenched super regen receiver I first tried in early 1992. H. 6 to 25 MHz, which includes the 80, 40, 30, 20, 17, 15 and 12-m ham bands. Discover the historical Build a simple shortwave radio receiver! Easy project for beginners, covering circuit design, coil winding, and tuning. The regenerodyne concept was first used in the 1920/30s to provide stable reception on the higher HF bands whilst using simple regenerative receivers. A VERY SIMPLE RECEIVER The very simple receiver for the whole shortwave band. Jun 13, 2014 · N1TEV published article on ARRL said the regen receiver can compete most of heterodyne receiver actually. A simple method that could be used for measuring the actual received frequency in a simple regenerative receiver, such as the one presented by N1TEV. They reintroduce some of the output of an amplifying transistor back into the input, to get more gain. Homebrew RF Circuit Design Ideas "There is no such thing as a new idea. Jul 11, 2016 · PDF link). com VE3XRMRadio Control Toy 1 Radio Filters 1 Radio Frequency (RF) 1 Radio Hash Filter 1 Radio Receivers 25 Radio Receivers - Crystal 2 Radio Receivers - Reflex 1 Radio Receivers - Regenerative 17 Radio Receivers - TRF 7 Radio Transceivers 2 Radio Transmitters 21 Radio Transmitters (AM) 20 Random LED Sequence Generator 1 Receive Converters 7 Receivers In the present report, a simple Armstrong-type regenerative receiver for the short-wave bands capable of tuning from 3MHz to 12MHz will be presented as a design exercise. Price: Since parts are not really that critical or numerous, the cost of construction is minimized. The combination of a very high gain regenerative RF stage with a very sensitive signal diode provides a sensitivity equal to that of many superheterodyne receivers while only consuming about 16microamps of power supply current (with R2 at mid position which is typically the threshold of oscillation). (2003) Small portable regenerative receiver Simple "ultra portable" version for 20, 30 and 40 meters" If it didn't have so many buttons, it would be a particularly suitable circuit for making a mini receiver with a small battery. Armstrong's well-known regenerative receiver. This is the type of receiver upon which all modern AM/FM radios are based. This receiver is no more difficult to build than any two or three tube regenerative receiver. 50 ARRL Sep 30, 2022 · I have been experimenting with a very simple AM regenerative receiver discussed at circuitbasics. This receiver will receive AM, CW, SSB, and FM (with slope detection) and has excellent sensitivity, selectivity, and frequency stability. 73 and have fun, Greg Latta AA8V Back to Dr. As there were two surplus gates yet we decided to use one as the VXO with ceramic resonator. This compensates for lost energy, giving the radio an arbitrarily high Q factor and gain. So, some eight years later I took a stab at building another regen receiver. Since there are really two valves in one glass envelope, the set is really a two-valve receiver. No audio transformer is required anymore, the audio signal is much stronger and you do not need to use special, sensitive headphones anymore. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. The gain of any amplifying device, such as a vacuum tube, transistor, or op amp, can be increased by feeding some of the energy from its output back into its input in phase Shortwave ReceiverHOTDXS WORKBENCH - The KC5LDO Shortwave Receiver - Oct 31, 2022 · The regenerative receiver is really just a crystal radio with an amplifier feeding RF back into the tank circuit. The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. The schematic is shown here: I obtain fairly good performance feeding the output to an old Radio In the end this simple regenerative receiver meets its design objectives as well as Austin's requirements. The project emphasizes simplicity while delivering reliable performance, incorporating innovative features like diode tuning and a smooth regeneration control. The short review is that I PART THREE OF THE VIDEO: • Improving A Simple FET Regenerative R DX EXPLORER: Videos on homebrew amateur radio gear that will hopefully inspire you into crafting your own unique radio projects. Jun 6, 2025 · A simple short wave radio with high sensitivity is narrated in this post and be built by any radio enthusiast. Greg Latta's Electrical Engineering and Amateur Radio Sep 8, 2000 · Simple Regen Radio for Beginners Manhattan-style Construction Charles Kitchin, N1TEV has a wonderful little regenerative radio project in the September 2000 issue of QST. The main receiver board is extremely simple to construct using only one FET and an audio IC. Taking this design, I worked closely with a couple of Boy Scouts in the neighborhood who showed some interest in my "radio stuff", and we together constructed the Regen Shortwave Receiver using Manhattan-style ugly often revisit the fascinating subject of simple regenerative receiver circuits. High Performance Regenerative Receiver Design There have been several popular Regen projects in recent QSTs and ARRL Handbooks Look at the design process and progress; then build one—or both—of the receivers described. This document provides a detailed circuit explanation for a simple regenerative radio receiver designed for beginners. 00 73's Apr91 SIMPLE SUPERX RECEIVER $5. 5 MHz and uses a variable capacitor, coil, resistors, capacitors, FET, battery and regeneration control to receive AM radio broadcasts and SSB transmissions. It's a step up from crystal radios, and not as complex as superheterodynes. Here’s a low cost, simple-to-build, portable shortwave receiver. The two types of receiver, regenerative and super-regenerative, while schematically very similar, are completely different in their operation. 40-43 So you finished building your K-2 or K-1. Many schoolmasters, for in- stance, have Oct 31, 2013 · But what really made me drool was chapter 9, entitled “How to Build a One-Tube Regenerative Receiver”, which contained the instructions for constructing a receiver that promised to “bring in the signals of amateur, police, aviation, ship and broadcast stations hundreds of miles away. Its design is noncritical and the receiver is easy to get going. 50 73's Nov90 GOOF PROOF REGENERATIVE RECEIVER $4. How much fun can such a simple regenerative receiver give! My version of the portable regenerative receiver The regenerative receiver takes the plate detector one step further and adds a small amount of positive feedback, resulting in “regeneration” that substantially increases circuit gain and selectivity (ability to separate nearby radio stations). Unlike regenerative sets (which are common homebrew projects for medium and high frequencies), superregens have very broad selectivity. g. It was certainly not the intention to make a good receiver. use tickle coil as regen feed back, at high frequency this increase the feed back then improve the smooth. several key point for this, 1. I once was able to cut the sidebands off of WWV at 10 MHz when the regeneration was tuned just below the point of oscillation. It also outlines a TRF breadboard project using a single ZN414/MK484 Here is a simple VHF receiver you can build without any special components or test equipment. Regenerative and Superregenerative The regenerative receiver is all about doing more with less. Most of the current is drawn by the audio power amplifier (about 5mA when idle and a max of about 8mA in operation). When you add an LF stage and a fine tuning to the simple receiver with only one fet, you will have a much better regenerative receiver. This kind of receiver is easy (and fun) to build and has been used by many generations of hams to learn radio basics. Aug 30, 2021 · You can watch a video about the simple receiver — which looks good on a neatly done universal board — below. Build a simple receiver between the regenerative and the direct-conversion receivers. If you choose to connect it to a PC, you will normally disconnect the headphones A REGENERATIVE RECEIVER FOR BEGINNERS A modern version of the classic re- generative receiver is shown in Fig 17. Most parts are mounted on a printed circuit board that you get to make yourself. In a straight regenerative circuit, the input signal couples to the detector, and some of the output signal is fed back to its input, in phase. Like all the KRC kits it comes with a comprehensive construction manual which brings this project well within the grasp of the keen constructor. The Kit was used as the G-QRP Buildathon night in 2015. Jul 3, 2017 · 1942 One Tube “Beginner’s Special” Receiver Seventy-five years ago this month, the July 1942 issue of Popular Mechanics carried the plans for this simple one-tube regenerative receiver. S. A recent design by [Selenium] is super simple because it uses a si… Not a top performance receiver, just a nice toy for portable use. After field-testing a prototype of this receiver, the author considered it convenient to conduct a comprehensive theoretical study of the circuit for interested readers, the same that has been included in this paper. We simply take a lot of old ideas and put them into a sort of mental Superregenerative receivers for VHF and UHF Superregenerative (or 'superregen') receivers have been used since the early days of radio as a simple and cheap way of receiving VHF and UHF signals. This receiver can be used to listen to the shortwave bands AM programs as well as the amateur radio stations broadcasting on SSB or CW at 49m. LOW MU triodes make the best regenerative JFET Q2 operates as a tickler feedback or Armstrong regenerative detector cir- cuit. Jan 2, 2024 · The next circuit depicts our final receiver circuit, which is a solid-state adaptation of Major E. pdf), Text File (. Sep 18, 2012 · The regenerative radio receiver or, even super-regenerative radio receiver or, "regen" if you prefer, are basically oscillating detector receivers. Even a fine tuning by moving your hand towards the coil! Real Barefoot Technology: very simple with only one active component! "Barefoot" technology or simple, cheap and harmless technology. I built three of these radios so far, and each one averaged two afternoons of construction time. It uses a single bipolar transistor (Q1) as a regenerative RF amplifier with high gain of around 100,000. com/2016/10/a-simple-regen-radio-for-beginners. A few transistors and other parts is all that's needed to hear signals thousands of kilometres away. He is one of the experts on t A unique feature of this simple circuit is the ability to control the regenerative feedback at the first transistor amplifer stage for high gain. Simple receiver with the 74HC4066 IC (2) by PY2OHH Following the pace of our friend and namesake Onno, PA2OHH, we built a simple receiver (already published here) for the 40 meter band, using the 74HC4066 as mixer and buffer. Virtually all commercially manufactured receivers these days are superhets, and though cheap, good performing receivers are readily available, you still can't beat the thrill and challenge of using a regenerative receiver you have built yourself. org/web/20200220014250/http://radio-receivers. An in-depth guide on building a ceramic resonator-based regenerative receiver for the 40 meter amateur radio band, featuring easy construction and portable design for enhanced DX signal reception. You connect the receiver to a simple wire antenna, that can be a simple Schematics and Circuits Index radioSPARKS. Fist of all, use capacitor as throttle regen control, this is the key factor for smooth regen control. 25 ARRL QRP CLASSICS BAND-IMAGING CW RECEIVER 5 BD SET (HB CH30) $20. 5 to 10 MHz but had difficulty with SSB signals. Testing involves connecting an antenna, ground and audio output A simple regen radio for beginners by N1TEV https://web. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. 5 to 12. Regenerative Receivers A Regenerative receiver introduces positive feedback in the RF receiver circuit, resulting in Regenerative receivers use a special type of detector that is essentially a user-controlled oscillator. With it, you can receive dozens of international shortwave broadcast stations at night, even indoors, using a 39-inch whip antenna. This receiver uses superregeneration for high sensitivity and low parts count. This part of my site features some simple receiver projects ranging from the simple crystal set to a working TRF Regenerative Receiver. However, this receiver architecture is by no means new, but on the contrary one of the first receiver circuits of the past century. 5 MHz direct conversion receiver 3. Designed for beginners, it supports AM, SSB, CW, and FM reception. behavior of the 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. Mar 3, 2016 · Design and implement a minimalist but practically usable regenerative receiver capable of HF reception from 3-30 MHz. Jul 27, 2015 · Crystal radios may be the simplest kind to make, but regenerative receivers are more practical and only a little more complicated. Jul 17, 2020 · These are receivers you are much more likely to encounter in modern equipment. The receiver, dubbed 'The Moorabbin', is a two transistor regenerative receiver of conventional design. The QRPGuys K8TND Regenerative Receiver covers the 60, 49, 41, 31, 25 meter shortwave bands (approximately 4. The consequences of regeneration of the regenerative TRF receivers are the radiation and unwanted coupling of the antenna and the L-C circuit. 6 Transistor Super Regenerative Receiver. Regenerative receivers work by means of a controlled amount of positive feedback. 2. A 12AT7 should also work quite well in this circuit. Excellent sensitivity – This design is the best performing Regen I have ever built No critical adjustments and easily repeatable results – I have built this circuit now three times with different inductors, for different bands and with different JFET device types on Regenerative and Super-Regenerative Receivers. Also be sure to check out this gorgeous Manhattan-style regen receiver. One-Tube Regenerative Radio Circuit⁚ A Comprehensive Guide This comprehensive guide delves into the fascinating world of one-tube regenerative radio circuits, specifically focusing on the popular 1E7G tube. 3. We also are now offering a parts kit to build the radio, see below. Regenerative Receiver - Regenerix 2018 Description Regenerative receivers (in German literature also called " Audion ") are a very clever way to build receivers with a very small number of active components. A simple to assemble regenerative SW receiver by SV3ORA Here is a very simple to build, 25 components receiver, that has relatively good characteristics. Apr 21, 2020 · My other hobby is designing and building simple, one transistor regen receivers, most of which tune the AM broadcast band, although I have built a couple covering the lower portion of the HF broadcast bands as well, just for a challenge. 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. An operational process that can be used to select the wanted signal and manually distinguish it from the image one, in such a receiver. Secondary winding 12 and capaci- tors C3 and C4 select the received sig- nal while tickler winding 1. The receiver worked from 3. It can be modified for other HF amateur radio bands. SUPER REGEN VHF AND UHF RECEIVER QEX Sep/Oct 00 Description: The board can be used to make a 38-54 MHz, 88-180 MHz, or a 118-136 MHz AM or FM receiver. Here we present the circuit diagram with discussion, and describe our compact printed circuit board version of the radio. To build a small version, a many buttons have to be omitted. From schematics of other regenerative receivers I have recently seen, this same basic circuit can be used with two separate triodes, or a tetrode or pentode as the detector stage. Jan 26, 2016 · The document summarizes Rich Bonkowski's home brew shortwave radio projects. Lets build two of the most popular single valve Superregenerative (Super-Regen) receiver circuits and see how they perform on the Broadcast FM Band between 8 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. Although the regen is one of the oldest receiver designs, it’s still widely used in garage door openers, walkie-talkies and wireless “internet of things” devices How better to explore the world of shortwave listening than with a regenerative receiver. This project was designed and built by Charles Kitchin. 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. I bought a KRC-2 kit and this post is my review. (ref. use pre RF stage to reduce aeronautical Sep 8, 2000 · Simple Regen Radio for Beginners Manhattan-style Construction Charles Kitchin, N1TEV has a wonderful little regenerative radio project in the September 2000 issue of QST. So, this is the story of how I came to build a shortwave regenerative radio and is given to you free and without advertisements. Building Notes for Tube Type Regenerative Radios by Dave… Apr 25, 2023 · The KRC-2 regenerative receiver kit: a review Tue 25 April 2023 Tagged: electronics I recently learnt about regenerative radio receivers. 50 73's Feb88 MICRO-20 RECEIVER $5. It describes his first project building a simple regenerative receiver circuit using a printed circuit board. Regenerative control, tuning, band selection, it has everything. It is based on a circuit which appeared in Practical Wireless for July 1981. txt) or read online for free. These use regenerative, direct conversion or reflex circuits. Feb 15, 2024 · The end result was not just a reflexive but a regenerative receiver. Project uses 2 J310 FETs, a 2N2222 transistor, and a LM386N audio amplifier. Analyze the key aspects of the receiver’s operation (e. The red box highlights the use of the same RF coil for two tuning ranges, the frequency relationship between which reflects band imaging. 105 (Included in above article) A Broadband HF Amplifier Using Low-Cost Power MOSFETs--Part 1 QST March 1999, pp. This kind of receiver is easy (and fun) to build and has been used by many generations of hams to learn radio basics. Listening in the garden in the sun to all kinds of radio signals, locating interference sources or use it even as a receiver for a noise impedance bridge, it is all possible. Its small A Simple Regen Radio for Beginners Need a simple, fun project possibly for a Scout Radio Merit Badge? This project is a great way to introduce kids of any age to electronics and shortwave listening. Any dual, low, or medium-mu, triode will work just fine, provided it can be made to work at fairly low voltages. com. 5… Sending this distorted signal through a simple low pass filter is enough to recover the desired signal. F r example, read the series of articles by Bruce Vaughn, NR5Q in Electric Radio. A Simple Regen Radio for Beginners Need a simple, fun project possibly for a Scout Radio Merit Badge? This project is a great way to introduce kids of any age to electronics and shortwave listening. The article begins by noting that “the small receiver is apt to be despised in these days of 7 and 8 -valve superhets, there is still a very wide field of application for the simple one-valver. #375 Three Transistor Shortwave Receiver Building a simple 3-transistor regenerative receiver for HF shortwave. Most regenerative receivers used this Armstrong circuit, in which the feedback was applied to the input (grid) of the tube with a "tickler coil" winding on the tuning inductor. The regenerative receiver ruled throughout its age in radio history and did so until the Major introduced his superheterodyne receiver circuit. To prevent regeneration from turning into self-excitation, a trimming resistor W is added for gain adjustment. 50 73's Nov90 THE SMOKE DETECTOR RECEIVER $4. Over a decade of homebrew tube radios, and much excellent material on regens. This is a very useful and simple Signetics single chip FM receiver Integrated circuit product I've ever found I got this late 1985 in Akhihabara Electronic Market Tokyo. The A collection of simple transistor receivers and converters for HF 3. These are relatively simple radios to build and they can receive any type of modulation, from AM to Single Sideband, to FM. 00 ARRL QRP CLASSICS THE NEOPHYTE 40 METER RECEIVER USING NE602'S (QST 12/88) $5. . Feb 1, 2017 · A further refinement was the so-called super-regenerative receiver, in which the feedback was increased beyond the point of oscillation, but repeatedly “quenched” by an ultrasonic frequency A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noise-limiting and agc action and, freedom from overloading and spurious responses. No Vacuum tube regenerative receiver schematic. They are simple detectors which may be used for cw or ssb when adjusted for oscillation or a-m phone when set just below point of oscillation. Mar 28, 2016 · How do we achieve this? The regenerative stage is fixed at 10. Regenerative Receivers Regenerative receivers provide a surprising level of performance with only a handful of components. 75. Coils are few, easy to make, and permanent. They are simple detectors which may be used for cw or ssb A Simple Regen Radio for Beginner Notes - Free download as PDF File (. There are circuits available for a Solid State version of the audio amplifier and Regenerative Receiver. Perfect for learning electronics. The receiver can tune from 3. Figure 2 —Coil specifications table for the 6K8–6C8G superhet-regen receiver. blogspot. Feb 1, 2024 · The plans for this one-tube–er, I mean one-valve–regenerative receiver appeared 85 years ago this month in the January 1939 issue of Practical Mechanics. archive. 6 to 25 MHz, which includes The WBR Receiver Build this simple receiver and “bridge” the gap between regenerative and direct-conversion receivers! D espite the well-known draw-backs of regenerative receiv-ers, the elegance and simplicity of the regenerative detector is still appeal-ing. 73K subscribers Subscribe Oct 22, 2019 · Most of the discussions on this forum are tube related but I thought that some might be interested in a simple shortwave receiver which tunes from about 3. Jan 30, 2017 · simple am regenerative receiver awsh included in Ham Radio 2017-01-30 281 words 2 minutes The NEOPHYTE is a simple one-tube regenerative receiver that uses a 6U8A triode-pentode, a tube that found widespread use in the television industry as a VHF oscillator (triode) and mixer (pentode). Now what? One watt will get you 40 with this 160- to 10-meter Aug 4, 2015 · Antenna Isolation – This is achieved with a simple grounded gate input stage which shares the LC tank with the oscillator. SUDDEN Rx G3RJV $6. 4 MHz to 8. 7MHz and used as an IF amplifier. 5 MHz superhet receiver Experiments with ceramic resonator 7 MHz regenerative receivers Experimenting with the BK1198 receiver IC (Digitech AR1458 conversion) Simple FT8 and JS8 direct conversion receivers Starting in simple software defined radio Jul 24, 2011 · The WBR – A Simple High Performance Regen Receiver for 40M by N1BYT EDIT (July 26th 2014) – If you’re thinking of building the WBR, I strongly suggest you check out my most recent build here, which incorporates a mod suggested by LA3PNA, and a different configuration for the AF amp that I think provides nicer sounding audio. 50 The “URMSTON” Regen Receiver is a join venture between the G-QRP Club and Kanga (UK). It provides good general-coverage reception of the short-wave bands from 1. It was a simple VHF communications receiver which was very popular. 3 provides regenerative feedback. Here's how to build a simple 1-transistor radio receiver. The Circuit design created by George Dobbs G3RJV and Paul m0xpd who also created the PCB have produced what is a great Receiver. The coil of #22 wire dominates the visual layout, and we imagine winding it might Aug 30, 2023 · The Sputnik regenerative receiver was designed for the 40m amateur radio band, the perfect project for beginners in homebrew radio receivers. frjgk auzu nfdp ctpzl h77 sbkeb wqdy pp5 s5gjl bwgk