B5X95A (Algemeen)

door Ron Kremer , Groningen, 05.03.2023, 10:59 (628 dagen geleden) @ Pandu Rajan

How does the phase inverter work in the above radio set?

The second half of the ECC83, B3', has a cathode and an anode resistor of equal value.
These are R17 and R29 respectively and they are 56k each, so this part of the ECC83 tube can
produce equal drive voltages but in antiphase to drive both the output tubes.

With kind regards, Ron

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PA0RKG.....even if the plate glows red, the tube isn't dead !!