Thanks, Mike, for the very helpful tutorial on adjusting the RS35 voltage.

If I do this at all, I'm going to proceed with caution, and may actually
have someone sighted over here to help, just to be sure nothing unexpected
happens.

Obviously, my other solution would be to take the RS35 out of the circuit
and replace it with the Kenwood PS53 supply, but I am sure the amperage
rating on the Kenwood supply is closer to 20.

P.S.  Sorry for the delayed response here.  I had a power supply cooling fan
fail on this Windows 7 P C, and couldn't replace the supply until this
evening.  All is well now, though.

Tom Behler: KB8TYJ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Mike Duke, K5XU
Sent: Sunday, April 06, 2014 3:21 PM
To: [log in to unmask]
Subject: Re: Raising Voltage on RS35 Supply

Tom,

Yes, do clean all connections first, beginning at the bolts on the back of
the Astron. And don't forget the fuse holders on the Kenwood cable too.

The voltage adjustment for the Astron is on a circuit board, which if I
remember correctly without taking the lid off mine, is very near the front
of the power transformer and filter capacitors. It is just above the bottom
of the cabinet. With the front of the supply facing you, it will be on the
left side, but not near the edge. You have to work your hand down in there
to touch it.

It is one of those flat, circuit-board mounted pots that adjusts from the
top with a screw driver, or you can turn it by hand. The place where you
turn it is about the size of a dime, with a slot in the middle of it, and a
notch on the edge. With the front of the supply facing you, turning it
clockwise will raise the voltage.

It will go as high as 15 volts, which is a bit more than you want. So have
someone check the output with a volt meter before you fire up the Kenwood.
When I checked mine several years ago, it was at 13.4 volts. 
I raised it to 14.0, and the power from my TS570 came back to where it
should be.

You might check the voltage at the connector end on your Kenwood supply, and
set the Astron so that the voltage on the connector end of the cable from
your Rig Runner matches that one.