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Original Message

RE: First Simulation

Posted by jdrouin on March 12, 2017 at 12:05:24:




Learning more as I go along. I decided to set the voltage and frequency at the signal input source to 0 and then adjust the cathode resistor to 1K on the 300B to get an idle current of 60mA (plate voltage is still 350V).

Then I reintroduced a signal of 0.7V @ 1kHz, resulting in a current sine wave that neatly reaches -50mA to -70mA peak-to-peak (shown in graph above), exceeding the TFA-204's 60mA rating by 10mA.

A 1V signal produces -45mA to -75mA peak-to-peak.

Is this workable, or would it cause core saturation in the TFA-204?