I’m sorry I can’t assist but my 200CDs and all my documents are home and I’m not.?
Jeremy?
120Hz…, sounds like that is PSU (double mains freq, assuming 60Hz) rather than actual output…
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Thanks Morris.?
The 200CD is only producing a rather odd shaped wave of perhaps 200mv and random frequency somewhere < 120hz. It responds slightly to the amplitude dial but not to the frequency dial. All tubes heat up but I do not see any glow on the bulbs at all.
I am just stepping through the circuit 1 component at a time. At present I have pulled R50 and R51 pots. R51 is ok, R50 only measures 33k and is very scratchy so I will replace both. Whn back in place I will measure the volages across R27/28. R40 measures 3.1k.
I don't know why but I suspect this side (i.e. globe side) of the circuit hence my query about T1 & T2. Ohh well, I was looking for a challenging project :) for a beginner.
Would love to know what other 200CD owners measure for the transformer outputs, unfortunately there is nothing on the schematic which I find odd ?
Regards
Richard?
Jeremy Nichols