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The problem is getting replacement electron guns. It is very unlikely anyone in the USA is able or willing to tool up to do this work. I think the only place left that makes television jugs is in

Nope, David, at the risk of getting political and raising the ire of the TekScopes leadership, Americans (assuming we are in the majority on this group), boycott anything from OUTSIDE the US. Jim

Does anyone dare to do it with an oscilloscope tube? https://www.youtube.com/watch?v=RI88e9cHAkk

Repairing a 7t11 was like decoding alien technology — I needed almost a week just to understand what it was trying to tell me!

Tam Your video is most entertaining and well explained. Well done! The documentation accompanying my kits is spot-on, with all the correct codes and descriptions fully matched, ensuring the fastest

I misspoke. It looks that that particular .bin file can't be downloaded for some reason. Luckily, 160-3493-00 / IC U2400 (I mistyped the p/n in my previous post) is socketed and there no need to

Hi Vladimir and all For the purpose of helping others who may have to tackle similar repairs, here is my report: It should first be noted that there are at least two types of power supplies: an

Jose Luu <jose.luu@...> added the photo album 784A PSU REPAIR ( /g/TekScopes/album?id=301696 ) : images of burnt and repaired area of a 784A PSU

No need to use an isolation transformer to float the scope for this measurement. The chassis of the scope is grounded normally, not like old CRT TVs or monitors that mostly had a "hot" chassis. Just

You could download that BIN file and program it into a new prom chip. Perhaps the existing one is flaky, hence the come and go error?

This scope has me scratching my head. I had it running all night without any problem, I doubt part number 160-2393-00 is actually the culprit despite the occasional startup error. I suppose I should

Hi Alberto! Your scope powers up correctly. The SRQ light stays on because a power cycle was detected. This can be cleared via GPIB or the Keyboard (see manual). You can ignore this. As far as I can

Tnx Holger (and others)! I will study more deeply the service documentation, because I didn’t note an easier troubleshooting approach to the digital section. I am just equipped with the signature

The simple solution is just boycott the USA.

Dear Barry Suggest you read the excellent Tektronix Circuit Concept book on oscilloscope CRTs, and learn about the development and characteristics of mesh dome CRT. Then follow the service manual on

I have a bit more info. I started the scope up again and I got the initial interrupt error that I posted in the beginning of this thread. When I shut it off and started it back up, I was able to read

Jean-Paul and Raymond, Is there anything that can be done to improve this behavior? I was thinking that reducing the sensitivity of the intensity adjustment might help. Thoughts? Barry

Hello, For all those of you new to customs - in Europe we had it for 20 years. Small video is at <https://youtu.be/XCgWlNomEgo?feature=shared> which should answer some questions. Tam -- With best

Noise may be HV corona j

Dear Menecham: Very timely note, suggest to repost on Tekscopes2 and BUY/SELL forums. Perhaps also EEVblog? We have seen congress in US proposing removing the deminimus exemption. The entire