F5 power amplifier

Another F5 is born!

Well, after 6 months of slowly gathering everything, reading re-reading re-re-reading this thread and all the other wonderful info about this amplifier I could find, I have finally finished my F5! It bias'd up super easily and after playing for a day on my bench with some cheap speakers, it is now in my main system. This is the best amp I have ever used, hands down.

This was the first amp I've ever put together and I would like to thank everyone who posts here, you have been a tremendous help. I didn't ask too many questions, due to the wealth of info and all the awesome build guides. I think I read 6L6's and the main tutorial hundreds of times.

:cheers:
 

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Ok. I'm back. New mosfets and now it's working again, but the same old hum is present in the two channel. Now I have solid core twisted input.
 

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"... but the same old hum is present in the two channel."

Not completely clear - are you saying the second channel or two (both) channels? If it is both, check for strong electrical field from fluorescent or halogen lighting near your work area.

There are still wire pairs that can be twisted - see transformer leads (primary & secondary) in post #14115 above.