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Thanks for saving the inventory from getting tossed. I'm sure it will help keep a lot of Tek and HP gear from getting parted out or worse. The benches in my shop are 75% Tek, so I'm grateful for your

I Adam, I strongly suspect that you have a bad trimming capacitor (C163 or C187). They had influence on both + and - signal path. If there is no change at all when turning they, one strong possibility

I managed to get the screen looking a little bit better in the corners. After having a closer look, it turns out the clear plastic screen behind the blue filter was filthy on the edges and after a

Rick, I echo what Paul says. One thing you can do is look for a donor 576. As you know from reading through the messages, the older 576's have issues with the HV (brown) transformer. I got one of

Possibly the 5ADP1 crt, as suggested by Walter.

There are videos out there on Tek's CRT production line. They are very interesting. With sufficient resources you could probably duplicate a tube, however it would be cost prohibitive (you'd also need

hi Bob, question: Tek 576 CRT specifications, design, x-rays, ... alternatives garp66 11:27am #209592 Does anyone have any design specifications or technical information on the CRT used in the Tek 576

Find R830 - a 3M3 resistor, it's towards the back of the scope, to the right of the EHT module. Use your DMM on continuity/beep then resistance to check by buzzing out from the intensity pot, scope

Does anyone have any design specifications or technical information on the CRT used in the Tek 576 CT ? - anyone have Xray images of that tube ? I understand for the many posts in Groups io that it

I have a 7J20/J20. I haven't used it in a while. It's on my "to do" list. But I am grateful when I run across application notes for it. DaveD KC0WJN [email protected]> wrote:

A .pdf of the 1976 Applied Optics 7J20 paper was randomly uploaded to the Files section. -- Who in this group still has a Tek 7J20 RSS ? -- Is anyone familiar with the differences / similarities of

Gordon, What I do to test crts that do not have a socket for a tester is to use the 12 pin adapter, small test clips to make contact with the connectors for the heater, G1 and G2 then hook them up to

I was never a fan of increasing the voltage on a CRT filament, even temporally. I always thought that that was a good result for CRT manufacturers, parts sellers, and techs, but not consumers. Power

Tom & Darla, This is clearly a huge task and everyone here hopes the best for you. I'll keep you in mind for future Tek and HP parts needs. In the meantime, since you asked for feedback, I went to

The part speced in the Tektronix documents (070-6863-00) is an Eagle Picher LTC-7P Battery. The Tadiran is the same chemistry; but does not have... AFAIK... internal reverse charging current

Here is another possibility for Linux/MAC... There is a GPL'd version of the host software for the CGR101, a two channel scope that used to be sold by Syscomp Design: https://github.com/mildred/CGR101

[email protected]> wrote: My limited understanding is that you need a 250mV rectangular wave with a risetime much less than that of the 2465. Leo Bodnar's step generator is currently the traditional

Well you could try a fast pulse generator based on avalanche breakdown of bipolar junction transistor... if you believe the specs. AFAIK... ideally you want a scaled delta function, to measure the

It turns out that a friend has a Sencore CR70 CRT checker, but it doesn't seem to cover many scope tubes. Does anyone know if there's a way to use it to check the 547 crt? Thanks Gordon

Depends on what you mean by “broke”, Luca. If you mean uh, yeah, it seems like it’s working, then it could mean it’s not broke. But it would be foolish to assume that something inside one of