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Jean-Marc, I downloaded the 7B52 manual and that does indeed help. Thanks for the suggestion! Unfortunately, I think my signals stop at TP470 which makes me fear a TD (or TDs) is bad. I think

Barry, Barry, Yes same for U750 , it is also a 155-0042-03 IC on mine. I will buy an Artek copy, thanks. For your trigger, the 7B52 wil be a good reference for trigger voltages and waveforms and

James, The 1.5A bridge rectifiers are suspect. It is recommended to use 4A types. I have done this by the advice on this group. The 4A types run cooler due to not being run near it's current

Just to clarify. On the A10 Storage board, there are three tantalums which all read short when connected, yet fine with one leg disconnected. They are, C1846 C1826 and C2097. I am presuming

The Miller Integrators that I have in the parts mule 7B53A are 155-0028-00, but I also have a 5B10N parts mule in the right serial number range to be using a 155-0042-03 part. My notes say "the main

The serial number for my 7B53N is B052213 and U750 in it is a 155-0042-03. I haven't found a serial number range in the manual and presumed it covers all serial numbers for that model. I'm not sure

Thanks Colin but it seems the 7B3N trigger part (and front face) is 90% inherited from the 7B52 in all cases. For the sweep part, I can't generalize but mine (SNB051276) has a sweep part with a sweep

Hi Mark and thank you for your advice. Any components from Mouser shall probably have to wait until I next go to Europe, as unfortunately the postal services here simply cannot be trusted to

Hi Guys, I don't know if this is of much use, but my Tek hard-copy Service Manual for 7B53A/7B53AN has the s/n 107222 on the front page, is 070-1342-00 and also has pages marked "MANUAL REPRINTED

Barry, If you want to discuss the trigger board maybe you can open a new thread because I just checked mine and I can maybe help. Everything is identical to the 7B52, schematics, voltages, waveforms

Hi Carl, I'm actively looking for these carts. Chesterton is pretty far away, but it's a strong maybe. Please check your email. Thanks, Chris

Thanks Barry ! this is useful information. I'd buy it from Artek asap;: can you please check if it suits my serial number B051276 ?. Then I think I can work out the voltage levels similarities with

Hi Jean-Marc, I happen to be working on a 7B53N as well (mine doesn't trigger). I purchased a scan of the service manual from Artek Manuals. It has the correct schematics, etc., and might be well

Hello all from the great Tekscopes group, My 7B53N has SN B051276 and the sweep board doesn't use the components showed in the 7B52 service manual. It takes from the 7B53A because of the central

Tim, The Locate highlighted portion length should match the Time/div setting. For Time/div fully CCW (at a given range) the portion should be about 50% of the total length. Is Time/div also

Ok. That’s too far away for me. Thanks. DaveD

I have a 7S12 that 'half-works', in that I see the pulse from the S52 / S6 combo and I get the step-response from a length of cable BUT, the Time / Distance crank does nothing to the display and the

Oh, I’m also not sure if they are -03 parts: do you absolutely need an -03? — Jeff Dutky

I have a couple from a badly abused 7B53A, but I don’t know if they are good. Is there a way to test them on the bench? If they prove to be good I can send you one. — Jeff Dutky

Hi Carl, I'd love to have it for my 7409.? I'm in Columbus, can you put it on a bus?? 9 hours RT is kinda a stretch. -- Bruce Atwood PhD Sponsored Guest, Department of Astronomy The Ohio State