[ARC5] R-27/ARC-5 Hookup Question

[Kenneth G. Gordon]

On 19 Jul 2013 at 19:30, D C _Mac_ Macdonald wrote:

> Can you actually feed the HV, gnd, and filament supply in through that
> back connector?

Yes. Fair Radio Sales made and sold a box many years ago (1970s) which 
contained a power supply, speaker, BFO ON/OFF switch, and RF gain 
control/AC ON/OFF switch, painted gray, and connected to the receiver 
through a cable and plug which simply plugged into the back. I have one of 
those units. All you need is the +HV and filament for power. You don't need 
to worry about the screen-grid voltage. That is taken care of internally.

> I recently purchased four 12.6 VAC @ 3 A transformers and already have
> four transformers with 115/230 V primary and 120 V C.T @ .5 A
> secondary. 
> 
> I figure I can apply ~120 VAC to the seondary and full-wave rectify
> the 115/230 V primaries to run ARC-5 receivers.

That would work: or you could use a voltage-doubler to get the full 250 VDC 
if you wanted it.

> Basically, my idea is to build a box that will power and control up to
> four ARA/274-N/ARC-5 receivers.

Been done. An article in Electric Radio Magazine detailed just that.
 
> Since some of my "Command" receivers have already been hacked on the
> rear connector, I can build cables to run them from the "magic" box as
> well.

If the dynamotor connector has not been damaged, use an old dynamotor 
base to connect power to.
 
> I haven't been able to find any receiver racks or I would use some of
> those instead.

Well, those would only be a help if the rear-panel connector was still on your 
receivers.

Ken W7EKB