Hello, and welcome to big nicks alfred morgan 1tube regenerative receiver page. 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. Of course i had several ways i could go if i built a regenerative receiver into this. This is a homebrew regenerative receiver, mostly based on several designs by charles kitchin n1tev. A regenerative receiver with agc for 80 meters or 310 mhz. A piece of aninchthick wood was cut to fit the inside bottom of the box. Figure 2 the super regenerative receiver is considerably simpler than a superheterodyne circuit. Everyone should build at least one regenerative radio receiver. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodynes superior performance and the falling cost of tubes. A threetransistor receiver the fet as a regenerative detector by walter f. Based on a schmitttrigger circuit, the quench generator switches the oscillator and rfamplifier stage. To tune the receiver you have 2 turnbuttons, 1 for tuning and another for regeneration how many times the signal shall pass through the transistor.
I called my version um58 because all my projects have an m in their name. See more ideas about ham radio, short waves and radio design. Whilst its most important function is to isolate the regenerative stage from the aerial, it also provides a useful amount of gain. Sep 14, 2015 the second thing is that, because the cabinet is wood, the receiver is not completely shielded. Nr5q, regen receiver, regenerative receiver, seaside chassis. In the back there is a schematic for a 4 tube ac operated regenerative receiver with plugin coils. Note if you have read this article before and are checking back in, it would be a good idea to clear your cache, to ensure that you are viewing the very latest version of this post. Groundedbase transistor, tr1, acts as a radio frequency rf amplifier. The regen radio was one of the many inventions in radio technology that was made by edwin armstrong. This month a regenerative receiver designed for serious listening on the long, medium and short wave bands will be described. Jul 24, 2011 as an adult who recently semiretired, it feels as if ive come full circle. The ability to distinguish friend from foe is essential to any military action. Regenerative receiver category is a curation of 24 web resources on, a 12volt homebrew regen, designing super regenerative receivers, small portable regenerative receiver.
Us20060264196a1 superregenerative receiver with damping. The resource is currently listed in in a single category. It is hoped that we can continue on from the very high level of interest and participation that occurred on the crystal set night. Signal input is fed to the emitter e of tr1, and potentiometer vr1 acts as an. A single vacuum tube may be used as a detector for satisfactory headphone reception up to fair distances. The regenerative receiver, regen radio was a popular form of radio receiver in the 1920s and 1930s. For information regarding the theory of operation check out some of the links at the bottom of this page. 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. Rca regenerative receiver design the radioboard forums. Ancient radio books are my favorite sources for regenerative receiver theory as the information hasnt been muddled with in the name of cheapness or to promote the super heterodyne.
A high performance regenerative radio circuit salad. Regenerative and reflex receivers this file contributed by kim smith and the radio electronique. This gives it very high frequencyspecific gain and a measure of selectivity. It is the user selenium who has come up with that circuit. Secondary winding 12 and capaci tors c3 and c4 select the received sig nal while tickler winding 1. All of the following, in italics, assumes that you are using the agc80 receiver in its narrowband mode for the 80 meter amateur band 3. A follow on project from the highly successful crystal set night.
This project was my first regenerative radio receiver and one of my favorites as well. Lange, wiyds vex in this age of crowded hands and sophis ticated communications systems, there is room for the lowly regenerative receiver. Superregenerative receiver model 412315hm users manual for 412 315hm super regenerative receiver details for fcc id hbw1614 made by chamberlain group inc, the. A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noiselimiting and agc action and, freedom from overloading and spurious responses. Analyze the key aspects of the receivers operation e. I n basics for a regenerative receiver to perform well, three basic requirements have to be met. I have not yet built this receiver, but intend to do so asap. For a regenerative receiver to perform well, three basic requirements have to be met. Figure 3 the super regenerative receiver features relatively few components. This is a regenerative receiver with an rf preamplifier and two tuned circuits. Regenerative receivers have the advantage of simplicity with good performance, and for the last 25 or so years have been a large part of my means for listening to medium wave transmissions. A non regenerative onetube receiver with condenser tuning is shown in fig. I promised to show photos once the project was done, but got sidetracked although i did post it over on arf where some of you undoubtedly saw it. Regenerative shortwave receiver pf c8 d1 d2 r4 20120 pf 1 06 pf sw3 0.
As a result this form of radio deserves its place in this summary of the different types of radio available. The main category is regenerative receiver that is about regenerative receiver. Is there anybody who have expericence of regenerative shortwave receiver. The chance to spend all the time i want building and listening to radios is an absolute gift, and the wbr regenerative receiver aug 2001 qst that ive had the pleasure to use these last few days has brought the magic of radio listening back in a big way. I do add material and make corrections from time to time. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube.
The wbr a simple high performance regen receiver for 40m by. Qrp kits scout regen sw regenerative receiver version 1. Jun 11, 2010 last fall i was asking questions here on this forum about components in the context of a homebrew project. So that settled it, this little box was going to be a regenerative receiver. The super regenerative receiver includes a sawtooth generator, a bias source, an oscillator circuit, and a quench control circuit. The sproutie mk ii hf regen receiver dave richards aa7ee. A super regenerative receiver with a damping resistor receives an input signal to produce an output signal. I will post pictures and a better description when i have done so. Jul 26, 2015 a regenerative receiver is just an amplifier that is almost but not quite at the point of oscillation. Jul 11, 2015 i got a tip the other day that there is an interesting circuit over at the radioboards forum where an lm386 ic is used as a regen receiver for the medium wave band. This regenerative receiver adjusts regeneration automatically and thus can be used by anyone.
If your intent is to use the receiver as a 310 mhz shortwave world band radio, you will want to ignore the following, since you dont want a frontend filter to restrict your wideband. This would be useful were i to wind a coil for the 23mhz region and use the sproutie mk ii in conjunction with crystalcontrolled converters to cover specific bands. A three transistor receiver american radio relay league. The regenerative receiver may not be the most advanced receiver. High performance regenerative receiver is shown in fig. The regenerative radio receiver or, even super regenerative radio receiver or, regen if you prefer, are basically oscillating detector receivers. The receiver tunes the entire 30m band 1010010150 and performs quite well. I wont forget how exciting it was for me to build such a humble radio that so greatly outperformed the crystal receivers that i had been building up to that point. This receiver uses a 2n4416 jfet orj31, which provides a more sensitive detector than an mpf102.
Mar 02, 2016 design and implement a minimalist but practically usable regenerative receiver capable of hf reception from 330 mhz. I through is a simple receiver that should be easy for most anyone to build, regardless of his experience. We check every set of boards that we do on our kits. You can build a receiver with only 1 transistor and you have a sensitivity of a few uv. This link is listed in our web site directory since friday apr 11 2014, and till today high performance regenerative receiver has been followed for a total of 2206 times. High performance regenerative receiver resource detail. Washburn, w2rg the operating enjoyment on 80, 40, and 15 meters provided by the transistorized qso getter described in my article for the july, 1957, issue of ham ties prompted the con struction of a companion transistor receiver. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit.
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