Dick, LF Group,
power supply voltage will you be using for your new TX, and what RF power do
you hope to get out with 4 times IRFP450?
Dave G3WCB IO91RM
Hi Dave / Dick.
If it helps: I converted on of my 250W linear amplifiers which used 4
IRFP450s to class D(ish) The power output went to 700W on 136kHz. I
just replaced the input phase splitting transformer with the normal class D 4426
I also used the same amp in Scotland at 300W on 73kHz to
work Jim M0BMU and Derek G3GRO who were nr Lands End. PSU was adjustable 35 to