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The RF Workbench / Re: NOT A Replacement For Your Stretchy Audio Amp
« on: September 13, 2020, 1745 UTC »
Ya know, a lot of the problems with these amps stem from the use of a transformer in the first place. Why not double the supply voltage, eliminate the transformer and drive the PA direct from one side of the audio amp IC?
I made a thread about this some time back... https://www.hfunderground.com/board/index.php/topic,40717.0.html
*edit* I forgot that this is a 40W TX requiring 48V peak mod, and have not yet found an COTS audio amp IC that will run at that supply voltage. Might be time to build a simple PWM modulator?
+-RH
I made a thread about this some time back... https://www.hfunderground.com/board/index.php/topic,40717.0.html
*edit* I forgot that this is a 40W TX requiring 48V peak mod, and have not yet found an COTS audio amp IC that will run at that supply voltage. Might be time to build a simple PWM modulator?
+-RH