The receiver is based on the AN602 double-balanced mixer IC, with the big brother of the ZN414 (the 10-transistor radio chip), the ZN416, employed as an IF amplifier, coupled with a standard LM386 ... Radio Shack Special - R adio Shack Special.a one transistor super-regenerative FM receiver Special ,somewith .Th. ... This preview shows page 1 ...

One transistor super-regenerative FM receiver Posted by Florin in Audio , DIY , Electronics the author writes: Radio Shack Special…the name was given to it because all of the components may be purchased at your local or nearby hardware and Radio Shack store. The result was astonishing – with a zincyte (zinc oxide) crystal he gained amplification…(which is what the transistor is all about) After the first experiments, he built regenerative and superheterodyne receivers, and even transmitters. .

Simple RC Cars - Single channel Transmitters and Super Regenerative Receivers at 27MHz and 49MHz HOME Here is the 9 volt GS transmitter which does not use a crystal. This clever design allows only two transistors to generate both the carrier and and the modulation. Shown below at 27MHz 40MHz An LM386 IC power amplifier serves this purpose, making the overall design a hybrid mix of vacuum tube and semiconductor technology. The tube circuit consists of two sections: the regenerative detector and a low level audio amplifier. Refer to the schematic in Figure 1. FIGURE 1. Schematic for the retro regen radio. An AM receiver used to slope detect will hear static. The only real advantage to slope detection is that is can be cheap and convenient. When tuning in an FM signal with an AM receiver, the clearest sound occurs when the FM center frequency is offset from the center frequency of the receiver's tuned circuits.

Low Frequency Radio Receiver circuit project. There is no technical help with the projects. This circuit is shown as an educational example only. This radio receiver built on a piece of wood uses only 5 transistors but will receive longwave beacons and VLF beacons, depending on the antenna unit connected. 1-5 A Grid Leak Detector 1-6 Regenerative Radio Similar to Armstrong’s Original 1-7 A Tuned Radio Frequency (TRF) Receiver 1-8A Block Diagram of a Superheterodyne Radio 1-8B Schematic Diagram of a Superheterodyne Receiver 1-9A A Super-regenerative Receiver 1-9B Output Waveforms of a Super-regenerative Receiver 1-10 Block Diagram of a Direct ... The circuit diagram of the regenerative receiver MFJ-8100 is shown in Figure 1. It has 3 stages: RF amplifier, the regenerative detector and the audio amplifier. The circuit is designed with high input impedance FET transistors, the use of this type transistors provides in first two stages very simple schematic. Receiver Circuits and Tutorials - 2 Transistor Audio Amplifier Receiver, AM Receiver for Aircraft Communications, Experimental Fiber Optic Receiver, General Purpose Infrared Receiver

Block diagram of a basic superheterodyne receiver. Within a mixer the instantaneous amplitude of the two input signals (f 1 and f 2) is multiplied and this results in signals at the output of frequencies of (f 1 + f 2) and (f 1 - f 2). This enables an incoming frequency to be translated down to a fixed frequency where it can be effectively ...

UHF Remote Control Receiver: This UHF remote control receiver works in conjunction with the UHF transmitter described in my previous post. Circuit is quite simple but you must observe all recommendations on UHF construction layout (ground plane, stray capacity, inductance etc... An AM receiver used to slope detect will hear static. The only real advantage to slope detection is that is can be cheap and convenient. When tuning in an FM signal with an AM receiver, the clearest sound occurs when the FM center frequency is offset from the center frequency of the receiver's tuned circuits.

4 Transistor Super Regen Receiver 5 Transistor 144MHz FM Receiver by JF1OZL 6 Transistor Super Regen Receiver A Complete FM Radio on a Chip by YBØAH AM Vossenjacht Ontvanger 2002 door PA3GBV Direction Finding System by SMØVPO VHF Converter by EI9GQ VHF Super-Regenerative Receiver by VK2ZAY Another VHF Super-Reg Receiver by VK2ZAY Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. Regenerative Receivers - Surplus Frequency Meter Becomes Regen - a very interesting project. Regen 14 MHz Receiver - From France (In English) Regen Receiver by Kees Talen - K5BCQ; REGEN Receiver Top by K5BCQ; Regenerative Receiver Plans at GB list

Because of the large amplification possible with regeneration, regenerative receivers often use only a single amplifying element (tube or transistor). In a regenerative receiver the output of the tube or transistor is connected to its input through a feedback loop with a tuned circuit (LC circuit) as a filter in it.

Sep 03, 2013 · Sensitivity and selectivity are the major concerns of a short wave enthusiast when he looks up for a receiver. Commercial communications models with superhet circuitry surely satisfy his requirements, but these are expensive. He would rather go for a homebrewed radio, being a regenerative receiver an affordable choice. Transistor Biasing. Transistor Biasing is the process of setting a transistors DC operating voltage or current conditions to the correct level so that any AC input signal can be amplified correctly by the transistor Oct 06, 2019 · The circuit requires just 1.5 V for operating which can be implemented using a single button type of cell. You would also want to build this ONE TRANSISTOR FM RADIO CIRCUIT. Feedback from one of the avid readers of this blog, Mr. SA Genoff. "Could you take a look at my 1st design of a single transistor radio ? Attached is a photo of my work.I ... Great deals on Heathkit Ham & Amateur Radio Receivers. Be prepared and able to communicate in case of emergency with the largest selection at eBay.com. Fast & Free shipping on many items!

Two-Transistor Regenerative Receiver Based on an earlier regenerative receiver circuit, the author developed an especially simple but high-performance version using modern components — a regenerative receiver using only garden-variety transistors, but with good reception characteristics. A silicon transistor may be used if the base-bias resistor is changed according to the table. Crystal radio with one transistor audio amplifier, base-bias. For more crystal radio circuits, simple one-transistor radios, and more advanced low transistor count radios. Regency TR1: First mass produced transistor radio, 1954 Aug 25, 2012 · The first regenerative receiver was invented by Edwin Armstrong in 1914 and was been a standard receiver both for commercial and in amateur use long before the spread of super regenerative receiver. The circuit above was basically derived from the earlier works of Charles Kitchin, N1TEV and was modified for several improvements. An unusual Regenerative receiver circuit using only bipolar transistors December 6, 2014 July 1, 2015 raycharlesring RF This design uses junk box 2N2222A or 2n3904 transistors. RF 315/433 MHz Transmitter-receiver Module and Arduino: Hi every body , I searched on Instructables about a simple RF Transmitter-receiver module , Which is used in Remote control for cars , or to control simple tasks , like control relay on/off unfortunately I didn't find What I need , So i decided ...

Sep 22, 2016 · Fifty years ago this month, the September 1966 issue of Electronics Illustrated carried the plans for this one transistor regenerative receiver for the broadcast band. The circuit used a Texas Instruments 2N3820, which sold for $3.75 plus shipping, and put out good headphone volume with a single transistor.

Pentode Regenerative Receiver I'm considering building a small shortwave regenerative receiver that runs off of very low voltage: 1.5 volts to 3 volts. I'm looking for suggested circuits. The low voltage requirement includes not only the regenerative detector but also the audio section as well (and any front-end RF stage). RF 315/433 MHz Transmitter-receiver Module and Arduino: Hi every body , I searched on Instructables about a simple RF Transmitter-receiver module , Which is used in Remote control for cars , or to control simple tasks , like control relay on/off unfortunately I didn't find What I need , So i decided ...

Friends, I've successfully made Patrick Cambre's single transistor regenerative FM Radio using BF245C in place of MPF102 suggested. I didn't have any trouble except my BF256 didn't work on first turn ON! Jan 02, 2011 · I built this regenerative receiver in the summer of 2010 after Dayton. I'd built a simple transistor regen previously, but wanted to try a more serious version using tubes. Calling it a 2-tube receiver is a little misleading since the two tubes are dual section types (tetrode and triode).

Oct 11, 2011 · FM radio receiver using just one JFET transistor as an active non linear element, in regenerative topology. Most of single transistor FM radio receiver circuits I found on the internet dont deviate much from the above generalised design,except few which are completely different from it. A regenerative receiver for the 40 m band by LA3ZA I've had a lot of fun with the modified WBR (Wheatstone Bridge Regenerative) receiver which I built Manhattan-style some years ago. The design builds on the receiver described by Daniel Wissell, N1BYT in QST August 2001. Regenerative Shortwave Receiver Part 1 Regenerative Shortwave Receiver Part 2 The Finished Receiver The set of four photos below give a general view of the author's prototype. In the first picture, the brown wires connecting to the receiver at the left are, the antenna lead-in wire, rear most, and the ground lead, foremost.

the signal processing needed in receivers. However, with the exponential increase in transistor density, faster clock rates, and faster A/D converters radio frequency receivers and possibly higher frequency receivers and transmitters are now suited for the digital domain. Description. Here is a low cost AM receiver circuit that can be tuned from around 550 to 1100 KHz. Three transistors are used in this project. The transistors Q1 and Q2 are wired as a compound transistor pair in which Q1 is an emitter follower and Q2 is a common emitter amplifier. The emitter follower Another thing, I had never used a bipolar transistor in a regenerative stage before, but had read that the amplification factor of a bipolar transistor in a regenerative receiver is actually much higher than for a FET (I have since learned that an element with too much amplification makes for very unstable regeneration control -- like this one ...

See all articles from Popular Electronics.... One Transistor Pocket Radio. Reflex and regenerative circuits are combined in this sensitive and stable radio. By Alvin Mason Designing and constructing a one-transistor pocket receiver is a challenge to any experimenter. Transistor Biasing. Transistor Biasing is the process of setting a transistors DC operating voltage or current conditions to the correct level so that any AC input signal can be amplified correctly by the transistor The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. The detector is a “plate detector”, where RF is fed back to the Amplifier via a partially RF decoupled source (normally bypassed all the way for RF when used as a detector). Version 2: (07/30/2015) Five FET Regenerative Receiver. Way back in time when I was a 15 year old teenager I built my first short wave receiver. It was a one valve Telstar using a 954 acorn valve. I was always impressed by it's performance. So I decided to go Retro and build an FET version.

homebrew single transistor regen (with a stupid resonance question) ... I noticed that, for this ~1 Mhz receiver, the coupling capacitor from the tank to the base has ... Because of the large amplification possible with regeneration, regenerative receivers often use only a single amplifying element (tube or transistor). In a regenerative receiver the output of the tube or transistor is connected to its input through a feedback loop with a tuned circuit (LC circuit) as a filter in it. It is worthwhile pausing at this point and reflecting on the low powers expected into the loudspeaker and also on the reproduced curve for the GET 1 transistor. "20 mw input to the speaker" with a 15 volt supply doesn't sound like much, so this radio, if it worked, was not going to be a room filler.

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seulement mes emetteur fonctionne en fm,mais avec une longueur tres courte ( chez moi jusqua chez le voisin )..quand maman n'est pas la,je retire lantenne de la television et la met dans mon emetteur,ca n'augemente pas la distance,mais plutot decend sur la frequence.je ne sais pas quoi faire pour augementer la distance...je pensais que c'etait la polarisation de la base du transistor qui etait ...

One improvement Armstrong proposed was that Amplifier 1 could also be used as the local oscillator in addition to the detector by taking advantage of feedback from the plate into the grid circuit similar to what he and de Forest had accomplished with the regenerative receiver. This would have created a compact front-end function. This is a compact three transistor regenerative general coverage receiver with fixed feedback. It's based on the principle of the ZN414 only much higher coverage. The sensitivity and selectivity is relative good (especially on the LF and MW bands) as can be expected with this "simple" design.

Based on Kainka’s regenerative receiver circuit, the author developed an especially simple but high-performance version using modern components — a regenerative receiver using only garden-variety transistors, but with good reception characteristics. The author has published a version of this design on his website [2].

The 3 Transistor Short Wave Radio illustrated in this article is a regenerative receiver design. 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. This is a compact three transistor, regenerative receiver with fixed feedback. It is similar in principle to the ZN414 radio IC which is now no longer available. The design is simple and sensitivity and selectivity of the receiver are good. Circuit diagram. Notes:

Feb 07, 2015 · N0WVA’s One-FET Regen Optimized For SSB/CW Sounds Great! Since I began posting about regens, it has been gratifying to hear from fellow regen builders, and quite interesting and inspiring to communicate with other hams who are also taken by their charms.

Some years ago I built the ARRL simple regen receiver, in fact it was my first working receiver. I never placed it in a box and the board as been cannibalized when components short. This time decided to rebuild the receiver again and hopefully place it in a nice box. My original construction was on a PCB but now decided to place it in wood ...

A method of using a bipolar junction transistor as a self-oscillating down converter of a satellite down converter, said satellite down converter including a circuit having at least a receiver and an output port, said method comprising providing a bipolar junction transistor between a low-noise amplifier and an intermediate frequency amplifier ...

The Mivar R46 is a transistor-based radio receiver from early '70s. Mivar (Milano Vichi Apparecchi Radio) was an Italian firm founded by Mr. Carlo Vichi in 1945 (initially the brand was simply VAR). transistor threshold mismatch, are expected to worsen with smaller transistor gate length and higher data rate. Figure 1: Conventional Multi-Phase Multiplexed Transmitter 3. 20Gb/s Transmitter Architecture Figure 2 illustrates the block diagram of the proposed new architecture for a 20Gb/s serial link. This 20Gb/s transmitter uses a 2:1 output .

Regenerative: May 1965: Super-regenerative 3 Transistor MW/LW Receiver MAT101 OC72 OA81: 3 From 1 Short Wave Receiver: Feb 1966: Triode Pentode functions as aperiodic RF Amp. Detector with reaction and reflexed Triode Output 3A8GT: VHF Reflex Portable: Jan 1973: 40 to 110 MHz AM/FM Low battery consumption BF167 BF169C BTY51 OA85: Simplicity and ... 6J1+6J1 Electronic Vacuum Tube Super Regenerative FM Tube Radio Receiver Kits . ... Mini Compact Portable Radio AM/FM Battery Operated Receiver Transistor Best Gift.