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I've got a 40kV Glassman 2kW I'm in the middle of converting from positive to negative.

Who was it that was building the "frankenscope" about 13 years ago? -Dave (another one)

Hi Chuck The Fluke 40KV probe is 1,000M input, The only other quick solution is an electrostatic meter, but I doubt it would have the resolution that you require. George.

You're scaring me Dave.... -Chuck Harris Dave Wise wrote:

That is where I went first, but when my 100M Keithley probe is applied to the focus grid, it pulls the scope out of focus. It is a problem when the measurement equipment adversely affects the measured

If you have another power supply that can make 15KV, you could assemble a differential voltmeter using the supply, a battery-powered voltmeter as null detector, and another voltmeter to measure the

Ha!? I have a buddy who has a 3-car garage filled top-to-bottom with test equipment, wire and cables in containers in the back yard, and at least one storage unit.? Last time I was at his house he

Why don't you use a Fluke 40KV probe these are designed to work with a 10M Ohm input DVM George

"Thousands of square feet..."? I wish I had that problem... or maybe it's a good thing I don't!?? I just agreed to buy an early (maybe 20s?) German horizontal milling machine and I really don't

I thought of using a Fluke differential voltmeter that does have virtually infinite input impedance when it is in balance, but it too is only 1KV. I am going to have to figure out a way to sneak

Yep, something all of us old-timers need to do.Thanks for the reminder.?Jim Ford?Sent from my Verizon, Samsung Galaxy smartphone

Yep, I figured it was a long shot.Thanks, Chuck.?JimSent from my Verizon, Samsung Galaxy smartphone

Dad's carefully kept collection now dumped on the kids to figure out what to do with. I think of this dilemma often with my thousands of square feet of equipment storage. But some time has been

The anode voltage is 15KV... I the 34401 tops out at 1KV with 10M input resistance. Not even close. -Chuck Harris Jim Ford wrote:

All: While we are talking about Curve Tracers. Does ANYONE have a spare 575 CRT that they would part with? My brother has a 575 and it has a bad CRT. If you can help, please message me off

Hmmm... maybe use an HPAK 34401A DMM in high resistance mode?? Don't know what your anode voltage is - it could exceed the 34401A's range.? Just a thought.Jim Ford?Sent from my Verizon, Samsung

Hi Leo, Thanks for doing the test. The problem with making measurements in the focus area of the 2467B is the extreme high impedance of the circuitry. Even my 100M HV probe loads the circuits down

Ed, That's pretty much why I bought a 5111, that is to keep my 577 company on the bench.?? I had given my 5223 to the museum and was cleaning out 5000 plugins until I bought the 5111. Bob.

Hi Dave, I looked at the manual the other day- wow, it's definitely not a real Tek product!? Assuming the displays are working correctly, I would work my way from the transformer secondary, looking