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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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26th Mar 2021, 10:51 pm | #21 |
Triode
Join Date: May 2016
Location: Phimai, Thailand.
Posts: 49
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Re: Icom IC 251
Hi all. Well here is an update on the 251 PSU problems.
I gave up on it. I replaced the hole thing with a new SM, PSU for a laptop. It's running well now. I did find that the opto coupler was OS on both sides so at that point I decided to call it a day. Thanks for all your help on this problem. Now the next problem with it is the microphone is nor working so I bought a replacement but found the audio to be very low. On investigating this I find the so called direct replacement microphone has no per-amp inside it. Cheap Japanese crap has struck again. So I'm. Putting a single transistor inside so that should fix the lack of signal at the input. 73's. Paul. |