CRT

[C2]

I started having a problem with my oscilloscope CRT, actually the HV supply.

It started arching. I think the flyback transformer is PCB mounted and goes to a doubler or tripler, not sure which, but from there it has the HV line to the front of the monitor.

I think it is a doubler/tripler that is arching to the PCB. The thing is fully encased in epoxy and is about a 1x2" block. I can't find the part anywhere. It has 4 legs, I'm guessing in, out, focus, and DC or ground, then the insulated HV line out to the suction cup. :?

Anyway, any ideas on how to fix something like this?

 

[DTB Radio]

If I had a similar problem, I'd either just replace the scope from Ebay's numerous offerings, or start combing the countryside for tossed or soon-to-be-tossed TV's/monitors and see what I could find in flybacks.

 

[C2]

Well, that's no fun.

I like the scope...it's Iwatsu 100 MHz 4-channel with dual sweep so I can have two trace pairs or two traces sweeping at a different time base. It is rare that I've seen one like that. You can set a trigger delay between each sweep channel or have independant triggering too. It also has the options with a 7-digit freq counter and a DMM.

I'm thinking as an act of desperation, I'm going to file off some of the casing where it's leaking and recase the thing with Corona Dope.

It has to be a simple module, only four legs, there has to be something out there to duplicate it's function. I just don't know enough about this HV stuff.

I think PC monitors and TVs would have much too high a voltage?

 

[robogator]

Yes,a little Glyptal works wonders on transformers....That is what I would do if I couldn't find a replacement transformer..