[ARC5] Waking up Command Receivers

[Mark K3MSB]

I never repot the caps.  I just replace them with individual capacitors.
Recapping the SCR-274N receivers is straightforward and takes just a few
hours time (if you're slow like me.....).



On Mon, Jul 5, 2021 at 11:49 AM J Mcvey <ac2eu at yahoo.com> wrote:

>
> Yes the caps tend to be very leaky. The big ones on the power lines will
> go dead short all of sudden- even after the radio has been on a while!
> If you intend to use the radio, definitely consider re-potting all of the
> caps. The performance will probably improve also.
> I use a pipe cutter to make a clean cut, but a hack saw will work too...
>
> I've has less problems with the resistors, but that may depend on how the
> radio was stored.
> On Monday, July 5, 2021, 11:27:34 AM EDT, <gewhite at crosslink.net> wrote:
>
>
> I have a couple of power supplies for the AN/ARC-5 and SCR-274N that plug
> into the dynamotor receptacle and  are powered by 110 volts AC. One was
> made by the lab at Aircraft Radio Corp and I made the other myself.
> Reasonably neat construction. I want $50 each plus postage. - Gordon Eliot
> White, po box 129, Hardyville, VA 23070 804-695-4628
>
>
>
>
> -------- Original Message --------
> Subject: Re: [ARC5] Waking up Command Receivers
> From: Mark K3MSB <mark.k3msb at gmail.com>
> Date: Mon, July 05, 2021 5:48 am
> To:
> Cc: ARC-5 <arc5 at mailman.qth.net>
>
> Alternatively, you could just use a 28V dynamotor powered off of a 24 V
> supply  (or build a 28V linear supply as I did).  28V Supplies are pretty
> cheap on Amazon (just be sure to bypass the output lines as these are
> switching supplies).
>
> In Feb 2020, using a stock BC-453B,  I logged 68 NDBs during a weekend
> listening sprint with the receiver connected to my 160M INV-L antenna.
>
> 73 Mark K3MSB
>
>
>
> On Sat, Jul 3, 2021 at 11:19 AM Al Klase <ark at ar88.net> wrote:
>
> Gang,
>
> We all have these things languishing in our collections.  Here's how to
> use one without building up a complete system.
> http://www.skywaves.ar88.net/homebrew/ARC-5_PS/ARC-5_PS.html
> Let me know if you have comments or corrections.
>
> 73,
> Al
>
> --
> Al Klase - N3FRQ
> Jersey City, NJhttp://www.skywaves.ar88.net
>
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