In Reply to: Ray, take a look at this posted by Tre' on March 7, 2007 at 08:06:19:
I see what you mean. I was aware of the danger of confusing amplitude with RMS, when calculating plate current with signal applied. For that reason, using LTSpice, I measured the RMS current flowing through the voltage source that feeds the OPT center tap. This was during maximum signal, at 1kHz, averaged over a time period of 200ms, and I got a figure of 250mA (this excludes the screens, which are fed from a separate voltage source).I now doubt that the figure LTSpice gave me was, in fact, the correct RMS current. Either the simulator is wrong, or I misinterpreted it. From your example, the RMS plate current over the two tubes at max. output is ~175mA.
Thank you for putting me straight!
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Follow Ups
- Re: Ray, take a look at this - Ray Moth 12:37:42 03/07/07 (1)
- You're welcome......(nt) - Tre' 14:42:49 03/07/07 (0)