I think I have found a workable solution, it enables me to get rid of modulation at the gates and schottky rectifiers by-passing the substrate diodes should reduce distortion, I shall check things out and report back.
To use conventional resistors I need also heavy duty switching to select the combinations, so 50w resistors and 10A switching, and how do I come up with a constant impedence variable level control? I started with resistors etc. and cannot get what I want that way. A 30A 125W mosfet costs about...
I am maintaining correct loading on the amps but with a dummy load. The useage of the amplifiers is independent of any requirements of effeciency etc. I am primarily concerned with the dummy load and am trying to use mosfets instead of wirewound resistors as a means of dumping unwanted amplifier...
I am loading audio power amplifiers with a voltage controlled load to confiqure impedence and distribute power in conjunction with a transformer system, but first I need to get the voltage controlled resistor element sorted. An inverse parallel pair with blocking diodes is about the best I have...
I want to make use of power mosfets as voltage controlled resistors for a.c. currents without introducing distortion.
Typical devices like irf540 have everything going for them except the zener between D & S because they are designed to switch. Are there devices suitable?
