So... again another ridiculously long hiatus... more apologies for my protracted absence. It seems that I have rotating hobbies, just now off-ramping from my 16mm movie projectors and miscellaneous other bullshit.
Winter is pretty much done here in the south, emerging from my hibernation, and put in my order for the driver circuit and capacitors.
Printing all my previous stuff from the PL400 to put into a binder as a sort of "service manual," and starting to do the same for the 700. Having a refresher view of the amp, looking at 4 RCA 410s at the bottom of the totem, 20 OnSemi 21196s. Not sure I want to use the existing NPNs even if it saves some bucks, don't know what abuse this baby has endured. DAMN! A hell of a lot of thermal grease from the last surgery! Surprised to see that the previous surgeon used SilPads instead of mica in conjunction with the grease, and I'm considering using 2 SilPads for each transistor (opinions?).
I also see that this massive beast may have been DROPPED, the transformer isn't perfectly square. It works, if I loosen the bolts and try to shift it back I worry that I may impinge a few windings. The sucker is heavy, no surprise if it was dropped (my Bell & Howell 1540 FilmoSound was also dropped, bent rewinds and bottom plate...).
Well- merging two hobbies, found the photocell output for the soundtrack reader and thought it may be an opportunity to plug that into a preamp for higher fidelity. Decided it was a bad idea- for places on the film where the soundtrack area is clear film, I would be presenting DC directly into the preamp and subsequently the power amp. Bad idea, I'd rather burn out the 15w built-in than risk the Phaser. (opinions?).
Here's to equinox and emergence into life!