[ARC5] Power supply voltages for ARC-5 receivers

[Bob Groh]

Thanks to all for the responses.  Pretty much gives me exactly what I need
- 140 VDC and up to ??200 VDC at 60 mA or so.  Lower is probably better
given the age of most of these radios.  Works for me.

Bob, WA2CKY

On Sun, Feb 2, 2020 at 2:43 PM Doran Platt <jeepp at comcast.net> wrote:

> FWIW, I use 140v and it appears to be a sweet spot.  No genuine loss of
> sensitivity specs , although audio gain is down ever so slightly.
> K3HVG
>
> On February 2, 2020 at 12:51 PM Bill Cromwell < wrcromwell at gmail.com>
> wrote:
>
>
> Hi Bob,
>
> RE: your other post: I have seen ads (not from commercial resellers)
> offering a radio here and there on the list. The sky did not fall:)
>
> Some of us use 90 volts B+ (including me) and some others suggest 180
> volts is better. It seems somewhere from 90 to 180 works very well. Some
> people have used B+ as low as 12 or 24 volts but even with bias
> modifications to the radio they said performance was "a little less".
> The 200 volts plus from the dynamotors is NOT needed. In the high
> altitude bombers it may have helped keep the radios warm. Most of us use
> them at or near room temperature :) In those bombers temps were well
> below zero F.
>
> 73,
>
> Bill KU8H
>
> On 2/2/20 11:19 AM, Bob Groh wrote:
>
> The design is not the problem but I wonder if there is any consensus on
> the B+ voltage and current?  Filament is fairly easy to figure out so
> that is not a problem.  Thanks.
>
> Bob Groh, WA2CKY
>
>
>
> --
> bark less - wag more
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