[Boatanchors] Regen receiver article

[Carl]

And when you are ready to graduate to the ultimate regen get ahold of the 
old Navy  RAL.

For a bandswitching homebrew consider using miniature relays which were not 
available in the old days.

Carl
KM1H


----- Original Message ----- 
From: "Bill Cromwell" <wrcromwell at gmail.com>
To: <boatanchors at mailman.qth.net>
Sent: Thursday, May 06, 2010 6:44 AM
Subject: Re: [Boatanchors] Regen receiver article


> Jim Wiley said:
>
> Looking for information about a multi-band regen receiver article that
> appeared somewhere between 1958  and 1968, that was published in
> Popular
> Electronics or Radio and TV Experimenter magazine, definitely NOT QST
> or
> CQ.  May have been "Electronics Experimenter" or "Electronics World".
> Need magazine issue reference  ( any one or all of : publisher, year &
> month, article title, author) - anything to help me search other
> archives.
>
>
> Here is some info that may help:  The set was vacuum tube based,
> possibly using a 12AU7 + 6AQ5  or maybe a GE  "Compactron" tube that
> combined both the detector and audio stages into one envelope.  .
> Power
> was via a small transformer and a selenium rectifier.  It tuned the AM
> BC Band plus several short-wave bands, at least to 18 MHz, possibly
> even
> higher, and did NOT use plug-in coils. In other words, it was
> band-switched.   I think the tuning  coil was a multi-band affair,
> possibly made by J.W. Miller.
>
>
> Any help out there?
>
>
> - Jim, KL7CC
>
> Hi Jim,
>
> When you build your receiver here is a hint from a regen list I like.
> Bandswitched front ends can have dead spots on the dial and other
> instabilities caused by the unused inductances in the tuner coupling to
> the portion that is in use. The cure is to make sure the unused portion
> of the inductor is shorted out. If you design that into the construction
> it will be easier than fixing it later. You will end up with a regen
> that has fewer (hopefully no) problems. I like the plug-in coil approach
> for a number of reasons and this just reinforces my own personal
> preference. I know...I risk misplacing/losing the coils that are not in
> use.
>
> Regens are fun to use and give amazing performance from relatively
> simple circuits. They are strictly "hands-on" and when you use one of
> those you are literally a radio "operator". There are "improvements"
> over the simpler designs that are worthwhile but none of them lend
> themselves to microprocessor control.
>
> 73,
>
> Bill  KU8H
>
>
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