I am curious about those glowing tubes. The one that glows pink and purple might be very gassy but the only tubes I've seen that glow orange are 5651 voltage reference tubes. I wonder if you mght have tubes in the wrong sockets or something of the sort.
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On 10/27/2021 2:27 PM, Morris Odell wrote:
You should replace both tubes as the gassy one at least? looks like it has had a hard life. That might be all you need to get the 200CD going again. BTW the voltages quoted on the schematic are all measured with the unit warmed up i.e. at least 60 seconds after switch-on. I'd be interested to know what the voltage across R40 is once it's working. Depending on how I've recalculated it, it should be between -150 and -180 volts.
Morris
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Richard Knoppow
dickburk@...
WB6KBL
