Re: HMV 650 Anomaly
Thanks Joe. Looking more closely, the -4.5v bias supply is connected to g1 of the triode-connected Z63/KTZ63/6J7G AF driver. Phase splitting for the output pair is achieved using a driver transformer. Once I get to the power-up stage (probably a few days yet) it will be interesting to see exactly what effects this mystery pot has. Cheers, Jerry
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