[ARC5] ARA heater configuration

[Dave Jackson]

Neil:

You can download the SCR-274N manual at the below link.  Pages 175 an 176
have drawing of the parts layout and wiring for guidance.

I have a CBY-46104 (1.5-3.0 Mc/s) rx that appears unmodified and I can send
photos if you need them.  It should be reasonably close to the 3-6 Mc/s rx.


http://www.scr-274-n.info/to12r23scr2742.pdf


Dave,
WA4OBJ

-----Original Message-----
From: ARC5 [mailto:arc5-bounces at mailman.qth.net] On Behalf Of AKLDGUY .
Sent: Sunday, July 03, 2016 8:58 PM
To: ARC-5 List
Subject: [ARC5] ARA heater configuration

I have a CBY-46105 receiver (3-6 Mc/s) of ARA type. The heaters were long
ago rewired for 12V and I'm investigating the possibility of a restoration
to 28V so that it will run on the dynamotor with a single 28VDC supply.

It's surprisingly difficult to locate a heater circuit configuration, even
assuming it's the same as AN/ARC-5. Is anyone able to supply a link?

Otherwise, details of pin connections and heater line run would be really
helpful.

73 de Neil ZL1ANM
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