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201A
Sept 17, 2010 22:21:36 GMT -5
Post by 238 on Sept 17, 2010 22:21:36 GMT -5
Just acquired a 201A, keys up, but no mod. Will mod on ssb. All tubes check good. 238
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201A
Sept 25, 2010 8:57:23 GMT -5
Post by warlock35p0 on Sept 25, 2010 8:57:23 GMT -5
Just a few thoughts, are you checking the tubes on a mutual condutance tester? If it is a an emission tester only its readings are not reliable under load conditions,should use a mutual conductance tester,it will give a better idea of tubes viability under load. The tubes associated with the symptoms you describe are 6GH8A, V600, 6GH8A, V601 6GH8A, V602 , 6L6GC, V603. This of course assumes mic gain and microphone are working right. Good luck and be careful.
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201A
Sept 30, 2010 8:42:28 GMT -5
Post by 238 on Sept 30, 2010 8:42:28 GMT -5
Well when i got the 201A, it turned in to a 201. Someone had added the ch broad/crystals & selector out of a 40 ch radio. 238
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201A
Sept 30, 2010 16:46:38 GMT -5
Post by mark4 on Sept 30, 2010 16:46:38 GMT -5
What really needs to happen with that radio is all the power resistors should be changed. And electrolytic Capacitors. Chances are, with the stress on those undersized power resistors on the PC boards some have opened up. That is where I would start. There are so many problems in that radio caused by stressed parts. That is the place to start for me anyway. And if they converted it to 40 channels with the black box channel selector. If it hasn't failed already it will.
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201A
Sept 30, 2010 22:39:49 GMT -5
Post by 238 on Sept 30, 2010 22:39:49 GMT -5
It's the black box. Probably not going to put much time in it. 238
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