Hi Paul, Here's the simple solution http://qsl.net/wc6w/wc6wamps/index.html?fr63.html Note: If you are using Explorer 8 or 9, "Compatabilty Mode" must be selected on the "Tools" menu to properly view
Hi Paul, Acceptable on an indirectly heated tube. This will cause trouble on a filamentary type as even though the filament is structured to minimize the effect some modulation will occur. This is no
It's all a matter of filtering. Hitherto, valve heaters receive a low noise source of electrickery, but with this idea, there could be considerable noise from the switching waveform. Computer and oth
I am using a switcher to power the filament for a TH781 tetrode, as a driver for a TH628 Diacrode final PA. The tetrode needs 9.5 VDC at 325 Amps, and the switcher works very well. I was nervous doin
This is easy with a switcher. Switching designs include PWM controller chips designed for that purpose. They have various external inputs for voltage control, current limit, etc. It takes a few small
If the supply is not ground referenced there is no good reason it can not be used in any topology. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c