[Boatanchors] WWII Portable Regens

[Bob Groh]

Very interested in your work on the Torn E.b  - I have one downstairs that
a family member brought back with him after the war. I have vague ideas
about getting it working (and zero interest in doing ANY mods on it) and
would love to gather up any info anyone has pertaining to it.

Bob Groh, WA2CKY

On Mon, Jan 1, 2024 at 11:54 AM David Stinson <arc5 at ix.netcom.com> wrote:

> Been occasionally tinkering with
> WWII Portable Regens.
> Have a U.S. BC-186,
> Japanese 94-5 and German Torn e.B.
> The -185 and 94-5 are working and
> the Torn is getting there.
>
> Couple of questions:
> Did the other major combatants-
> U.K., USSR, France, Italy, China etc.
> have similar and widely-deployed
> portable regens?
>
> The BC-186 has two plug-in coils.
> My is 2400 KC to 3700 KC. I don't
> have a complete manual for the 186.
> Were other coil sets deployed?
>
> All the caps and resistors were good.
> Only thing needed was to trace the
> non-original connector and use a quarter-
> inch piece of heat-shrink to prevent a
> a short between a coil's trimmer cap and
> the coil case.  Simple and nice-sounding.
> https://photos.app.goo.gl/q5nfg7kZ5azUdVo89
>
> The 94-5 is a little more "fiddly." I got
> lucky and found a "parter" with a good
> Audio Output transformer.  I have fantasies
> about finding a 94-5 transmitter for it.
> Anyone want to trade a clean, working RS-6
> station for a clean, complete 94-5 transmitter??
> https://photos.app.goo.gl/fBfLzzwjnSEj6byY8
>
> The Torn e.B is still "in progress."
> Been trying to recover someone's failed
> attempt at re-tubing the thing- they made
> a big mess.  Here is a photo of an "oddity."
> https://photos.app.goo.gl/HJ95Er71RF3BNUfMA
>
> One of the tube stages has
> a wire-wound, adjustable resistor across
> it's filament, the "slider" connecting
> to a 2-Meg resistor which goes to the
> signal grid of the tube. It is missing
> in my set and the screw securing it is
> broken-off in the chassis.
>
> This area is very cramped and finding the
> exact mini-Wire-Wound with tap seems unlikely.
> The filaments are 2VDC.
> This is a voltage divider directly across
> this tube's filament,
> so the most voltage at the tap possible is
> 2V, and give the photo in the manual
> I assume this is a way to deliver
> negative bias to the tube
> without needing a "C" battery.
> Maybe 1 V is all the bias it needs?
>
> Given that 100 Ohms across 2 VDC is only
> dissipating .04 Watts, I'm thinking a
> small 100-ohm pot will sub until
> a suitable original surfaces.
> Any insights on this circuit?
>
> TNX ES HPY NY OM DE Dave AB5S
>
>
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