Re: {Collins} Step-start for 30L-1 - Good idea?

The relay is another good alternative.

Do we all agree that, other than the on-off switch, there isn't anything in the 30L-1 that's likely to be damaged by turn-on current surges?

(Anybody disagree with that?)


----- Original Message -----
From: "Mark Pilant" <n1vqw@xxxxxxxx>
To: "collins" <collins@xxxxxxxxxxxxx>
Sent: Tuesday, November 4, 2014 5:17:25 PM
Subject: Re: {Collins} Step-start for 30L-1 - Good idea?

 > The fix is the same for an electrical box with a switch on
 > it....turn on and leave on the rig switch and control the power with the
 > remote switch.

As an alternative, you could have the power switch in the rig energize a
relay which actually completes the circuit to the transformer.  (The relay
replaces the On / Off switch in the circuit.)

I have done this for my Collins 516F-2 as well as my Drake AC-3 and AC-4
supplies.  The relay has contacts rated for 10A, and only requires about
only about 10mA to energize.

Here is a web page I put together for a Drake AC-4 I rebuilt:

The circuit is very similar for the AC-3 and 516F-2.  Although the location
of the relay tucked in the 516F-2 chassis is different :-)

I'm in the process of writing this all up for a set of Collins pages for
gear I have been bringing back to life.


- Mark  N1VQW

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