[HBR] Regenerative communications receiver

[Brian Burns]

Hello Martin,

I ran across that thread on eham while idling away Sunday morning a week
ago. I posted a link to it on the regenerx forum, a Yahoo group of
regenerative receiver enthusiasts. A good group of very well informed guys,
by the way. No less than Dave Newkirk, "Mr. Regen", posts to it, and Gary,
"Mr. Regenerodyne" is the moderator.

I've not read through the thread as yet---lots of stuff there---but it's
high on my priority list.

How do you find working with subminiatures? They look awfully small and
fragile.

I just today received the two back issues of ER with Vernon's original
construction articles on his receiver. I'm going to re-draw the schematic,
and see what I can learn from it.

Cheers,

Brian

On Tue, Jun 2, 2015 at 9:04 AM, Martin Marris <mmarris at notecraft.com> wrote:

> Thanks Brian.
>
> I've ordered those back issues -- sounds very interesting.
>
> I've built a couple of regens in the past few years. The first one was an
> ARRL-designed "three transistor" Novice set from 1968 which works quite
> well, considering its relative simplicity. The other one is under
> construction at the moment. It started out as an attempt to design a
> portable regenerative set for use while hiking, but quickly morphed into
> something more elaborate, with hopes of building a "high performance"
> regenerative receiver using design tips from the 1920s and'30s. It uses
> subminiature, battery-powered 1AD4 pentode tubes (about the size of a
> fingertip). The current build has five tubes in four stages: RF amp,
> regenerative detector, AF amp and switchable CW audio filter. It is the
> first receiver that I can claim to have "designed" myself rather than
> building from a kit or a published design. However, to say I did it
> "myself"
> is a big exaggeration: I got masses of advice from the Elmers over on eham,
> and several times was saved from making embarrassing mistakes!
>
> You can read about it here:
> http://www.eham.net/ehamforum/smf/index.php/topic,103101.0.html.
>
> Best,
>
> Martin
>
> -----Original Message-----
> From: HBR [mailto:hbr-bounces at mailman.qth.net] On Behalf Of Brian Burns
> Sent: Saturday, May 30, 2015 16:28
> To: 'HBR Receiver List'
> Subject: [HBR] Regenerative communications receiver
>
> Hello All,
>
>
>
> Since things are quiet on the HBR list, and Kees says that discussions of
> other receivers are Ok, I thought that I would mention an interesting
> regenerative that I've run across in Electric Radio.
>
> Vernon Yeich, KB3RQE, wrote a couple of construction articles, first in ER
> #227 and then in ER #241. He has followed those up with an article in ER
> #301 entitled "A CW Receiver With a Double Tuned Regenerative Loop", with a
> number of changes to the original design. All these back issues are
> currently available from Electric Radio.
>
> I certainly don't understand all I know about this radio, but it looks like
> Vernon has attempted to incorporate some of the various refinements that
> hams were coming up with at the end of the regenerative era, say the
> beginning of WWII. He quotes some very impressive selectivity numbers, and
> the design has some features not normally found in a regen.
>
> Cheers,
>
> Brian
>
>
>
>
>
>
>
>
>
> ---
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