HP 1710B oscilloscope 2ch 200MHz 1976 teardown repair

[@gjvdspam]

I like the looks too of this scope.

[@werewr4947]

try and measure all resistors in the focusing network. i had the 100mhz model fail on me in a similar way and one high value resistor had gone oc

[@mrnmrn1]

I have a 15MHz storage HP scope from the late '70s and most of those HV axial film capacitors were bad in it, I had to replace all of them. They were low in capacitance and when I connected them to a HV supply with higher current capability they started to visibly spark and flash inside if I gave them voltage close to their rating (about 500-1000V below their rating). It was't easy to source those 3-4kV axial film caps. I only could find them on ebay, some came from NYC, some from Canada. I live in Hungary.

[@donstor1]

I think that you and Mr. Carlson should spend some time in a workshop with plenty of workbench space and a lot of high voltage.

[@TeardownOZ2CPU]

thanks a lot, great idea, I love his work and his videos, much recommended :-) I live in denmark, he live quite a trip away you know :-)

[@mrnmrn1]

13kg is not heavy for a high bandwidth old CRO. I had a Tektronix 647A clone that's either 29 or 34kg, I don't remember.

[@mrnmrn1]

So what will you do next with this scope? Just please don't scrap it, there's a good chance the CRT is still good, and the fault is in the HV PSU. Try to resell it if you are not interested in it.