[Collins] 30L1 will not key up

[Dr. Gerald N. Johnson]

Check the -120 volt bias supply. It cuts off the tubes while receiving 
and its the power source for the keying relay in the 30L-1. Then with 
the cable from the 32S unplugged checked for -120 volts (with power on) 
at that jack. If there is voltage then see if grounding that jack keys 
the rig. Then check the 32S to see if its keying properly and the cable 
between them is good. There are a few parts that can fail and cause the 
failure to key.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 1/31/2017 8:35 PM, Jim Pratt via Collins wrote:
>   Hello all,
> This is my first time posting so I hope you all will go easy on me. I have a 30L1 I bought at a hamfest.  This amp is in excellent condition, and did key up and putting out great power, however; within about 30 minutes of operating it just stopped. I don't hear the relay kicking in when I key up my 32S-3. Here is what I've done at this point;1. Cleaned the contacts of the relay.2. Checked voltage from the transformer.3. Checked the active components (bypass Cap's).
> All seems to check out. It's just has me scratching my head. Any suggestions would be great.
> --73--JimK7QI/ Z81A
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