Wayne Parham Messages: 18748 Registered: January 2001
Illuminati (33rd Degree)
Let me see if I understand you about the DRD amp:
1. The filament on the 300B is driven with DC. It comes from a transformer winding that is rectified and filtered.
2. The driver tube heaters are driven with AC that comes from a different transformer winding than the 300B filament supply.
Is that right? Do you happen to know the filament voltages for each tube? Do you know the plate voltages? Is there a single rectifier for B+ for all tubes?
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