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Wilfred, The astig pot could be dirty/bad by your description. The crt socket could be dirty and needs to be cleaned and reseated. R1486 is a known resistor that will be high in value. A Vishay VR37

Hi Jon, Thanks for your reply. I already downloaded a manual, without it’s impossible to do any repairs. I will check your suggestions, I also noticed that as soon as the picture is unstable in

Has anyone here ever adapted anything to replace Option 25? I have been searching for a long time, no luck in finding one. The only thing I've come up with it the right hand side of a TR502 with

I've put in the folder 'TG501 2ns and 1ns spectrum' plots from the TG501 for both the 2ns and 1ns outputs. The latter is clearly faulty...

/g/TekScopes/photo/13228/166411?p=updated%2C%2Ctg501%2C20%2C2%2C0%2C0

Hi Raymond, Yes I'm using a 1GHz bandwidth scope at 5GS/s. I've also tried looking at the output on a spectrum analyser, seems the largest peak is at 800MHz with many other harmonics of

BTW the pulse amplitude specs are on page 1-1 in the Service Manual. TG501’s I’ve seen easily meet those specs. Raymond

Hello Keith, You don't mention which RTM3000 you're using. They start out at 100MHz bandwidth but from your amplitude info, I guess that's not your model... Do you have a TG501 service manual? I

That new meter scale looks great!

Get service manual. Check all LV PS voltages. Follow HV PS and CRT checks and service. Most likey HV mult, high R resistors, HV transformer. Unlikey that CRT is bad. Jon

I'm wondering if it is CR515 or something else. If I measure the amplitude (Vpp) I see: 10nS - 1.480v 5nS - 0.820v 2nS - 0.724v 1nS - noise (10mV or less) I'd expect the 5nS output to be similar to

Hello all, I’ve been searching for repair information regarding a Tektronixs 465 oscilloscope and found this interesting website. So, I just registered and like to introduce myself. I’m Wilfred,

Fantastic ... thank you!

I just became aware, that I - erroneously - answered on a very, very old thread. However, the subject - 502A HV transformer offerd on ebay - might be interesting to some members here. -- Stefan

Hello Martin, there is one 120-0150-00 in the German ebay, https://www.ebay.de/itm/355750039284. It is expensive and looks not very good (aged/damaged in storage?) - but might be never installed -

I have it and just scanned it. It is here for a while: http://www.hakanh.com/dl/temp/2400B_Opt10_IFC_Guide.pdf If someone wants to upload it to TekWiki, go ahead. /H?kan

My headache is gone. There was a problem with the cable between the voltage sensor and the scope. The signal source in my case is a R&S radio test set. This is connected through an insertion voltage

Using a 1GHz scope (RTM3000) which should be able to see it.

wich scope are you using to see the 1ns pulse?, I think that you need a 1ghz scope if I recall correctly. I have a TG501, with a 500Mhz scope (TDS5054) I don?t see the 1ns pulse, but with the 7s14 it

[email protected]> wrote: I should note that the easiest way to diagnose these from the outside is to measure the DC resistance from BNC center to shell. In DC coupling, 1M it should be a megaohm