Mark,
I can't resist the evil temptation of advertising more modern
technology! Regarding the problem you see in 1500W amps using 65V LDMOSFETs:
Biggest issue I see for home builder is getting a 65V ~50A
> power supply.
The solution I consider most reasonable is to use some sort of highly
efficient amplifier rather than an old-tech, low efficiency, plain
class-AB one. In that case all you need for 1500W output is a 50V 40A
server power supply, which are plentiful as surplus, and dirt cheap.
Back to the workbench now. I'm working precisely on that. The parts
recently arrived, after a long wait.
Manfred
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Visit my hobby homepage!
http://ludens.cl
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