Author Topic: 250 Grey SOS  (Read 2415 times)


250 Grey SOS
« on: May 03, 2007, 07:51:06 AM »
Sending massive emergency call, could anyone please show me how to rewire the switch - in - out terminals in the way that a electronic dumbass might be able to understand. Thanks.
« Last Edit: May 03, 2007, 07:58:35 AM by Angelo »


Re: 250 Grey SOS
« Reply #1 on: May 03, 2007, 08:49:04 AM »
Look at the switch diagram on this page (not the true bypass):

I'm pretty sure this will work on the 250, using the original SPDT switch.


Re: 250 Grey SOS
« Reply #2 on: May 04, 2007, 01:01:15 AM »
Thanks for replying

 Across the input jack 3 prong is there power ie negative to input sleeve and +9v to input ring? And output jack ring to switch common. Output ground in series with input ground to the pc board ground?


Re: 250 Grey SOS
« Reply #3 on: May 04, 2007, 05:05:01 AM »
Thanks Tung finally wired this 250 properly with your help and the technicians at DOD who sent me an original schematic for the 250 & Compressor its been 15 years since signal went thru the little tone box.