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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

Alright, so I'm not in the clear with this 2247A. I've been busy with other things and had the scope off for about 3 days. Turned it on this morning and noticed the trace was a little noisy without a

I have a sleepy-eye assembly, switch attached to cable, if interested. I got it from the Tek Country Store (Tek salvage and surplus). It appears to be unused. Photographs at

Raymond! YES I mewant CRT expansion mesh, the SC504 have it bad, due to CRT geom, the SC501/2/3 do NOT Cheers Jon

I've had a couple of enquiries from US members here, requesting clarity on the new Customs Duties - which may or may not be applicable on my 24xx series Tekscope kits, which are shipped from here in

According to Findchips.com, Quest Components has VN1316

Thanks to all that have posted - it looks like I'm just going to find the time to open it up and start diagnosing. My feeling, and that that seems to be the opinion here as well, is that the fault

These parts are being operated in their linear region, so Rds(on) isn't relevant. As long as they can take the heat, what we need is agility, that is, minimal

internal CRT phosphor beam reflection ? My money’s on scan expansion mesh (to increase deflection sensitivity) artefacts. Raymond