Gotta love a guy that puts in new grommets!!! Eric, just beautiful work. Jani is over my shoulder ooing and ahhing too. She appreciates professional work too. Nice Eric, very nice....
Yes, the Triac board is new and Don has yet to list on his website.
The Triac is used as the main AC power switch feeding the transformer. The front panel power switch on the 700B now just switches low current for Traic gate drive and should last the lifetime of the amp.