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Are you sure it's in the PSU? Does it change if you bump the HV lead? I've had a tic from my 7704A that sounds like a static crackle if I move the HV lead with a nonconductive tool. Have not been

Super, thanks Jon.

Thanks Zen, much appreciated. I checked the main caps fairly cursorily for capacitance, which was textbook value, but didn't check them at proper operating voltage for issues. I will certainly do so

I have a 7904A with similar issues on the bench also with a VERY early serial number 507. In my case I have confirmed that there is issues with the main bulk filters they are arcing internally. 200

After seeing some interest, I decided to populate at least 1 panel with all SMT components. This might also be the way selling them to you. This enables me to paste and reflow solder a whole panel

Happy New Year everyone! I have a 7904 s/n 215841. I got it at an auction in the UK where I live, where there don't seem to be many of this series available, and it was FILTHY when I picked it up.

Dear all, The screen of my CSA803A developed a problem. It showes flyback lines, low intensity and I could not get it calibrated properly. The size of the picture, focus and convergence are

Ditto. I found a TU-7 on ebay for a reasonable price on ebay awhile back after searching for several years. DaveD KC0WJN [email protected]> wrote:

The130 uses two low frequency oscillators, 100..150 kHz. No modern line filter works below the FCC, or other minimum frequency. The instrument is not affected by incoming EMI nor creates conducted

Just keep an eye out on eBay for them, I bought a 1M1 for $40 plus shipping and a 067-0521-01 for $120 with free shipping a few months ago. They do come up cheap every now and again.

As my Tek 130 has lost its NEMA 5-15 inlet, and been butchered to use an IEC inlet. I'm tidying up the rear panel and adding a small anodised plate to cover theunsightly square-peg-in-round-hole

Hi Everyone, Happy new year. I have built a PC based calibration and verification system, early days. I am looking for info, s/w on Lotus measure, potentially one key element

I would think that very possible. HP developed a three-piece VTVM calibration system for use in the factory and by field techs. The calibration generator was originally assigned a five digit

I have not seen the history of these fixtures, the TU-7, 1M1, and 067-0521-01. I would like to believe the products developed out of in-house test fixtures used to initially calibrate new units, or in

Wow! Three hundred bucks plus shipping. I have noticed a substantial increase in price for 500 series on eBay, but didn’t know how much. Good luck in your search.

Does anyone have a 067-0521-01 that they don't need anymore? I see a couple on the famous auction site but the prices seem excessive. (even compared to recent historical pricing)

Hi, why not check feedback resistor R1589 47ohm and also R1571 10k, C1571 100p. G?ran

I started looking at the vertical interface board and how the 7A18s could not work here while 7A26s are fine, then took some wild goose chases that were dead ends. I decided to make sure it was the

I'd like to have some of those boards. I have two 7A13s and would like to replace all the relays. I also have a 7A12 which uses 8 of them. In addition I need two of the "polarized" relays

They operate a test equipment calibration service and sales from a brick and mortar so it's a step up from an ebay seller but yes that price is still absurd for what it is. What drives me nuts is that