开云体育

When I first got this 7904 it has been stored unused for years. I turned it on and the scope, with some plug-ins, entered tick-mode. I spent months trying to figure out what was wrong to no avail. I

I read Alan Hampel's article on restoration of the above. He asserts that "Surprisingly, electrolytics C99 (5?F) and C100 (25?F), factory originals, were installed backwards! Not surprisingly,

Hi, I read many of your posts on the 465m blowing HVPS fuse...I actually acquired a 465m looking almost brand new with the saga of the fuse blowing.. I just have one question, what is the voltage

Thanks for the advice. Re. the nick in the HV lead, I have not used dielectric grease before, does it set or would I need some particular variant for the voltages involved? Also, would a better

I have a recently acquired 465M with option 93. I can't seem to find and info on what that option is. Does anyone here know?

Evan Just post them. Everyone and is dog expects to have to modify 3D printer files. TIA EJP

Hi Dave, I know it seems that simple but I put some internal reinforcement beams across the top of the bays where the plugins go. I also did one over the row of controls over that and another L

Well, whaddya know. I found this while randomly searching for 2465B problems: https://bradthx.blogspot.com/2017/08/tektronix-2465b-repair-part-ii.html The description of the triggering problem was

Jon, Just to prevent a possible misunderstanding: I wasn’t talking about the ultor but the white two-part connector somewhere near the middle of the HV lead, where the (usually) red lead enters

Raymond the 21-24 KV CRT Ultor is polyethylene as is,the molded Alden connector. Indeed any nicks or splitting of the cable will cause arcs or corona to the nearby grounds og the ch?ssis , doghouse

I guess something to realize is that an air gap from the HV lead core to the outside of the insulation isn't enough to prevent arcing or even flash over; The dielectric strength of air is far less

Cross posting from Equipment For Sale group https://test-equipment-for-sale-wanted-or-exchange.groups.io/g/main/topic/fs_tektronix_575_w_mod_122c/110600766 Clean insde & out. The selenium stack was

Cross posting this from the Equipment For Sale group https://test-equipment-for-sale-wanted-or-exchange.groups.io/g/main/topic/fs_tektronix_577_d1_177_w/110601072 Clean inside and out. Serial #s 577:

It affects all channels in the same way. Hence the thought that it's maybe an issue with U500? Keith

Rebonjour Does the trigger issue, affect all 4 ch and line or only certain channels? Trigger path is from vert amps and multiplex IC. Use the self test, one og the tests or exer is for

Hello, I had a similar crackling and hissing problem with my 7904 years ago. It turned out to be the voltage multiplier U1615, internal arcing. The only visible indication of something being wrong was

Thanks for the reply Jon, The nick on the HV cable is about half way along from the dog hole to the connector, visible on the third image. If I don't need to mess with the transformer I won't, it's

Merci Jean-Paul Probing the TGA signal from pin 18 of U500, the triggering waveform there is as I see it on the screen i.e. intermittent. So it looks like U500 or circuitry before it in the trigger

Thanks for your suggestion, today I received a secondhand 80e02 in good condition for an acceptable price ?

Keith bravo for your work on NV Ram, beware of Chinese knock-off and old date code parts. Use machine pin socket Full cal is needed after RAM replacement See service manual and proper test