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I just wanted to add in an update

I tested the bias on an old Palomar tx75 last night ( I removed the passive bias...I know someone will ask). Transistior were 2x srf2072. Everything went pretty well....I set the idle at around 130ma.
I excited the amp with a radio insted of signal gen. I just watched the output power and current draw of the amp to see if it was changing class.
It seemed to be doing the job. Unfortunatly I have a power supply problem with my scope and I cannot check the waveform.

Its still not done..but at least I was able to somewhat verify that it was working.

Bob...thats one hell of an urge...the microwave. Hopefully you got over it by now

Good link DWB

[QUOTE="bushwacker, post: 168709, member: 527"] I just wanted to add in an update I tested the bias on an old Palomar tx75 last night ( I removed the passive bias...I know someone will ask). Transistior were 2x srf2072. Everything went pretty well....I set the idle at around 130ma. I excited the amp with a radio insted of signal gen. I just watched the output power and current draw of the amp to see if it was changing class. It seemed to be doing the job. Unfortunatly I have a power supply problem with my scope and I cannot check the waveform. Its still not done..but at least I was able to somewhat verify that it was working. Bob...thats one hell of an urge...the microwave. Hopefully you got over it by now Good link DWB [/QUOTE]

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