Re: LTSpice simulation of uBitx Power Amp
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I'm not assuming anything about drain loads, only that the load on the output of the transformer should be 50 ohms.
The LPF's on the uBitx and WA2EBY are symetrical, 50 ohms in and out, no impedance transformation there (at least for the fundamental).
Both amps are operating the IRF510's from a 24v supply, and the two drains of each amp
are bouncing about centered on 24vdc, out of phase.
The output should look very similar after we add in a low pass filter,
though any harmonics will be knocked out to leave behind a clean sine wave.
On Sun, Feb 4, 2018 at 10:53 pm, John Backo wrote:
However, note that the output is NOT 50 ohms until AFTER the LPF.