Re: Murphy Type V350
The field bottom cramp may be caused by a number of possibilities.
Low emission output valve, incorrect voltages, incorrect biassing, leaky capacitors in no particular order.. But change all the relevant wax caps in the field stage, one at a time as suggested as a first port of call.
The oscillator may cause the symptoms if the waveform it is generating is distorted due to faulty operating conditions.
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Thermionic Emission, warms the cockles of your tubes.
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