[ARC5] Relays

[J Mcvey]

That’s a bit high too, by modern standards, but better than 600 ma!


Sent from my undisclosed bunker location

On Sunday, October 12, 2025, 5:14 PM, kgordon2006 <kgordon2006 at frontier.com> wrote:

Great. At 24VDC, that relay draws about 80 mA, or about 2 watts.
Maybe those 40 ohm relays are all in series...or something.
Len W7EKB


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-------- Original message --------From: "hwhall at aol.com" <hwhall at compuserve.com> Date: 10/12/25 13:29 (GMT-08:00) To: Mark K3MSB <mark.k3msb at gmail.com>, ARC5 <arc5 at mailman.qth.net>, List Milsurplus <milsurplus at mailman.qth.net>, arc5 at ix.netcom.com, ac2eu at yahoo.com, kgordon2006 at frontier.com Subject: Re: [ARC5] Relays 
> Might anyone know the specs for the relays that are in the ARC-5 transmitters?

Maintenance manuals for SCR-274-N series (aka Army "ARC-5") say 300 ohms, +/-10%. A transmitter relay on my workbench (part #7252) measured about 315 ohms.

Wayne
WB4OGM



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