That is another point of failure. But the timing issues must be sorted out first of all. I have replaced the restorer diodes on a couple of scopes.

Did you check the ripple in each LV supply rail?

#photo-notice

You cannot add photos to your post. You can upload them to the Photos Section and then post the link to the photo file in your followup post. I agree with Tom, there is a good chance you have excess r

#photo-notice

I would say your first place to look would be the bulk filter caps. Possibly one or more dipped tantalum caps.

Since it is winter and I am more confined to the indoors, I am going to try my hand at OpenSCAD to convert my TM500 panel designs to a more flexible format. I originally produced my various TM500 pane

I would say, conservatively, 15-20 to 1 bulk filter caps or tantalum caps over HV failures.

If it was equipped with Factory Option 04, it could indeed still have the EMI mesh installed.

That is likely the expansion mesh in the CRT. There are no pixels as such. The 465B uses the same CRT.

“I've a 465 for parts. My thoughts are to extract the HV transformer from that 465 and use it in place of the transformer currently under test.“ I did this exact test with a spare 475 HV transformer.

Mine is >B200000 which uses the encapsulated Multiplier. These units use a slightly different schematic. I finally found the correct manual for this serial number unit.

When Attaching the 15v unregulated, I get excess current draw.

Great idea. They have all sorts of odd-ball items.

You can buy 1/8” green fiberglass rod on Amazon and EBay. Not expensive and very good substitute for original.

Since the +/- 18v winding is the source for the 15v + and - supplies, if the 15v is good, then the 18V built filter caps should be OK. The only reason for the 18v is as a source for 15v regulated supp

475, 475A or 485? Or if you don’t feel the need for 250-400MHz then a 465B would be my #1 pick. A good working 465B should easily exceed its specified 100MHz rating.

The cost of materials is the least of the costs involved. The cost of the machine, time to design, time to print are a big part of “cost”. One would need a larger format printer or the cover would hav

Steve, I will be willing to bet that Vintage Tek Museum could supply these. They have some parts units and have been supplying parts to others.

> Steven Sep 22 #195985 Hello, I'm a new member here, but long-term 7000 series user (7834 system, 7633 bench scope, 7623A in repair). Also long term TM500 series user. I had my 7633 scope just die...

The turns get larger as they come out from the start. We don’t know the diameters of the core or the windings. I figured between 50 and 100 feet just as a wild guess.

Recently my 7633 HV stopped putting out HV and obviously lost the trace. I received a replacement HV supply and have installed it to repair the scope. I am still curious as to the failure mechanism. I