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I thought TekWiki's images were those that were uploaded intentionally by someone who owns/owned the items. Maybe not. Barry - N4BUQ

Actually, I have not bought from that seller (had them mixed up with a different seller). In any case, the feedback and number of transactions certainly doesn't seem to point to a scam. Barry -

Barry, TekWiki often gets its images from eBay and this one appears to be from there as well, the width of 1,600 px is the telltale sign. Most likely this eBay seller took the original photo and the

That's more-or-less what I thought. I think I've bought from that seller with no problems. I might contact the seller to see what's up with those pictures. Thanks, Barry - N4BUQ

I assume tekwiki copied those photos. The seller uses the same background for other listings, and I've bought a few items from them over the last year (a 7B70 service manual back in March, and an HP

But then I see many many listing photos of that seller with the carpet and blue wall behind... and a 99.7% rating. So maybe they are the original source of the tekwiki photo...

Yep, selling something they do not have... scammer.

Does this look odd to anyone else? https://www.ebay.com/itm/375606603143 https://w140.com/tekwiki/wiki/T7510 Thanks, Barry - N4BUQ

Solid BeO is not dangerous. The only dangerous form is BeO powder (dust); as long as you don't grind BeO, you're safe. Ages ago, BeO microspheres were developed as a safe form of BeO for incorporation

Miguel, Sorry, it can't be fixed. Don't open it either, hybrids like this sometimes contain BeO, which may or may not be indicated on the cover.

Is there hv on the tube? Do you see the heater glowing? Measure the DC supplies with a scope, should be flat (-ish), no noticeable ripple.

Haven't seen these for a while now. I recall... even used...they were pricey... everyone "needed'' a TG. And you need an external counter... to 1.8 GHz... which isn't cheap either. AFAIK... nothing

Check the three transistors and IC associated with the 50V supply. One or more could be open/leaky/shorted. The series pass would be the first to check. Check to see if you have the 9V across VR1416

Dears, I got a 2715 with battery down. Do you have an idea where I can recover the elusive "271X Flatness Tests" software? Are you so kindly to send me it? Thank you very much in advance for any help

Hi everyone, I’m starting with oscilloscopes and electronics. I got a Tektronix 475 that I would like to repair for my lab. It turns on but unfortunately I have no trace...I tested the voltages.

Interested in a TR502 and cable to pair with my functional 7L13 Also would like original manuals for both Marty KL7AM

Thanks, Tom. This scope has had a bad case of that curse. One tantalum went up in flames and two more smoked pretty significantly. This one just shorted with no glorious demise. There are still

Well done, Barry. The Scourge of the Cursed Tant continues to haunt us. -- Cheers Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 420 Via Palou Mall Stanford University Stanford, CA

Bad tantalum, C3396, on the OUTPUT SIGNALS board. Replaced C3395 and C3396 and all is working again. Thanks, Barry - N4BUQ

Hi, I just picked up an OT502 E/O Converter TM500 Module in a mainframe of assorted modules, and am looking for a user/service manual for it. There doesn't seem to be much online.. If anyone has a