I'm still waiting for FedEx to show up at nearly 15:30 hours. I want to go back to the internal 100V supply in the Type 547 but not until I install a 500ma fuse in line as protection. That fuse is in the parts order on the FedEx truck somewhere.
Assuming that going back to the internal 100V supply is trouble free I've assessed where I'm at with the Type 547. It's got good and not so good. Here is what works:
A Sweep timing
A Trigger
B Sweep timing
B Trigger
CRT circuits and HV (That's a relief
)
Here is what is not working:
Horizontal. If I turn the horizontal control full clockwise I get a short trace far left.
Vertical. Completely dead. Turning the position control on the Type 1A1 plug-in has no effect.
Most of the semiconductors in this instrument are in the horizontal and vertical circuits. I suspect that those transistors have taken a beating from all the PSU issues and I'm going to find a number that are dead. I'm going to go after the horizontal problem first and get a full trace across the screen. Then tackle the vertical issue. I expect it's going to be a long haul.
And adding to that I'm not going to be able to work on this much for the next week or so. This weekend lady cop coming up plus next week I'm finally going in for surgery to the fix the hernia. Pre-op on Monday and surgery on Thursday. And it just so happens that my b day is this Sunday.