[Amps] Command HF2500 Vacuum relays

[Commander John]

Why did you do this. The original units work just fine.
   
  john w9zy
xxxxxxxxxxxxxxxxxxxxxxxxxxx w9zy
   
   
   
  Ed Stallman <ka5ebeeme at gmail.com> wrote:
  fellows, I have replaced the T/R relay in my Command HF2500 with Vacuum
relays ( Gigavac GH1 ) with the 12 volt coils. I have it setup now using a
separate 12 volt supply and adding ground through a foot switch !

It would be great if I could use the internal 12 VDC supply but it's keying
other relay ( 7812 ) so with the other relay plus the 2 vacuum relays, I
don't think the internal supply is a good idea !

Here's what I think needs to be done but need some help and assurance, Don't
want to blow transistors on the control board.... I would like to add SPST
high impedance reed relay to the control board of the Amp, to hold off the
12 volts to the vacuum relay for the 3 minute worm up time and to switch in
the 12 VDC from my newly added 12 volt supply... I'm thinking as I'm typing
, maybe I could use the 12 volt wire that was on the original T/R relays to
supply coil voltage to the reed relay? would this work ?

I hope I made myself clear?

Ed N5BLZ
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  W9ZY
                .... Commander John ....