Anode current was measured with the YFE digital multimeter.
Heater supply is 3.9V. Anode supply is 1.2V from an AA battery. (Always use a fuse in series with any source of voltage for safety).
9.7μA with 2.7MΩ Pleiades or pull up resistor.
4μA with 6MΩ.
Maybe the anode current plus external electron current pulled up by the grid was measured.
Must be Redone.
Redone. The blue anode lead was only disconnected and not 1.3V anode supply (-)
8μA with 2.7MΩ pull up bias resistor from anode to grid.
3.6μΑ with 6MΩ.
The amplifier sounds very nice with MD441 U3, MD211 N and Altec 4722 input transformer. See previous posts for complete signal path, setup.
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