Tag: 4-65a SPICE model

4-65a Triode Curves

Tracing the transmitter valve curves

20131102-171745.jpgI posted several times about my 4-65a SE Amplifier and also traced in the past the curves using my analogue curve tracer to get a view of the loadlines of this fantastic DHT in triode mode.

Now that I have the uTracer I traced again the curves including grid current and A2 anode curves which are very handy for this type of transmitter valve.

My tests were conducted with the following heating and bias setup:

  • DC heater using Rod Coleman regulator @ 6V and 3.5A
  • Cathode connection to the negative filament terminal of the regulator and valve.

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