开云体育

Hey all,

So, based on some exchanges in the thread about the Dennis Tillman PCB for the 577/677 build, I am definitely on my way (parts are coming). But I wanted to start a new topic on the 577 itself to get some advice.

This is a 577 that's in very nice condition and when I bought it in 2020, it was sitting in the seller's garage with a trace on the screen. I realize that doesn't mean a whole lot. But here we are 5 years later and, at some point, I'm going to have to bring her back to life.

So, I'm looking input on next steps. For example, should I warm it up slowly (and over what period of time) with my variac, etc. Or maybe do some diagnostics on the power supply before plugging into mains. And so on. I have a variety of test adapters but, given the power up sequence suggested in my operator's manual, the one that I don't have that I apparently need is the axial diode adapter

Thanks in advance for any replies.

David

Suggest use a metered variac,

No diode test fix needed, easy to just use banana plug jumper cables and Alligator clips to put any diode or 1 k resistance as load.

Bring line to 30v, observe mains current, raise to 60, 90, 120, observe normal mains current

Should have a trace or dot on the CRT, be careful with the intensity

Jon