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Post by husker on Oct 12, 2019 1:17:08 GMT -5
Hi all, the Browning Mark II receiver I recently aquired is very clean but looks to have a small..ok big issue. There is minimal to no AM receive and the S Meter has no movement either. If I switch it to SSB, the receiver springs to life as does the S meter.
I have just replaced all the rectifiers and caps including the multi section one. Any thoughts folks? I am getting ready to check all the tubes to see if they are ok. I have cleaned the sockets and replaced the nuvistors (I had a spare set just to see if it helped).
Thanks everyone
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Post by husker on Oct 12, 2019 19:34:22 GMT -5
And this radio has a Collins filter, I tried jumping that and it made no difference
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Post by 2600 on Oct 12, 2019 22:53:46 GMT -5
The list of things that could do this is pretty short. Comes down to T5 and CR3. Everything else is upstream from where the sideband signal splits off from the AM side.
73
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Post by husker on Oct 13, 2019 0:44:20 GMT -5
The list of things that could do this is pretty short. Comes down to T5 and CR3. Everything else is upstream from where the sideband signal splits off from the AM side. 73 Thanks for the reply sir! CR3 checks out ok, you think its T5? It's strange, if the AM signal is really strong (like channel 6 was today) the receive is great. But it fades and seems to come back. SSB is awesome. Would a bad T5 explain the s-meter lack of function? thanks again!! |
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Post by husker on Oct 15, 2019 22:46:33 GMT -5
The list of things that could do this is pretty short. Comes down to T5 and CR3. Everything else is upstream from where the sideband signal splits off from the AM side. 73 Chris, I decided to start with the new multisection cap and see what voltages I was getting...these don't even look close. 363, 368 and 188.. am I wrong or are these way off? |
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Post by husker on Oct 29, 2019 18:26:22 GMT -5
So I have learned that the guy who claimed the radio had SSB receive and weak AM is lying completely. It had zero receive. I have it at a friends house and on his bench, he has gotten it to receive, but not correctly as the S meter strength is much weaker then his MrkII. Sadly, I looks like this mistake is going to cost some $$$$. But the flipside is hopefully the radio runs for yrs after this
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