Brett gazdzinski wrote:
But is there any advantage over the 8 ohm to grid
setup?
The disadvantage is a lot of complexity, additional power
supplies, transistors that can fail, heat sinks, etc....
A lump of iron is a lot simpler...
If you don't mind the hysteresis loss and subsequent cross-over
distortion addition through the iron.
Transformerless audio-driving a Class B modulator. This way, you can
impose whatever audio you can get from your speech-amp
(source) onto the
grids of the modulator... and, with ~600v peak-to-peak, you
could drive
even a pair of 450TL's with this setup. It's certainly over-kill for
pentodes, tetrodes, or smaller triodes like 811's, or 812's.
--
73
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