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Hi Roland Like yourself I am now retired after nearly sixty years in the electronics industry and keep myself sane by repairing, preferably, early solid state test gear. I particularly like Marconi

Thanks all. That got me on the path. I think this must be a 3476A as it does not exactly match the 3476B manual available online. Just knowing what it was encouraged the dismantling of same and a

Hi ALl, I acquired a HP16500C. And I want to built a HP E2433-60010 Training Kit (since I couldn't find one to buy). Most parts are easily to be obtained, but does anybodyknow what the equivalents are

I forgot to fill in "For 82V, we'd use [values]", because I noticed that the values Philips used (953K and 59K) make something like 150V instead of 116V. I realize now that the junctions begin

Hi Richard, You were correct. I had thought astigmatism was only related to the symmetry of the focus in terms of the far edges of the CRT versus the center. A slight turn of the ASTIG pot was all it

Hi Tam Thank you for taking this project on I believe you will require some sort of specification / design criteria could you post you torts on this Group for feed back Regarding sell or lend anything

I had weird problems with my 141-T that ultimately proved to be the CRT. There's probably a small driver board mounted near the CRT deflection plate connections on the neck. I'd check that first.

Hi George, Thanks for your kind advices, I know the difficulties of working on switching power supply...have been in electronics the past 44 years, and sure, I do prefer repairing linear ps! Now, I am

I am looking for a copy of Safety Service Note 8757C/E-02-S? This is referenced by Bench Briefs 2ND Quarter 1990. Does anyone have a copy of this that they would share? Thanks Glenn --

Hi Roland I have been following this thread from the start. In my experience you stand little or no chance of finding a true schematic, what you need to do is to find someone who knows how to repair

That's what I'm leaning towards. Will measure tonight. Peter

Is this it? https://www.amphenolrf.com/connectors/ssmb.html https://www.amphenolrf.com/connectors/ssmb.html Wally KC9INK

While doing some work to my 140B recently, it was necessary to remove the slide-in connectors along one edge of the A602 board (to enable it to be lifted up a bit). It had been apart for a couple of

Hi,I had a couple of intermittent faults on mine (E14 & 35) which could never be induced to appear when the top two PCBs were 'unfolded' to their service position.One was tracked down to one of the

So I opened it up to take a look with the CPU and control board propped up at the sides, powered it on and the error was gone!! Looks like a connector not making properly? Anyway I re-seated all the

Hi Tom, I have the same power supply as yours and it's a faulty one also...I wonder if you sojve your problem and if you could identify fhe HP900 component ? I also think that it is an optocoupler,

I have noticed that the damage done by nicads in electronic gear often goes far beyond the location of the nicad. For instance, on the 8350B, the nicad pack is screwed to the frame on the side of the

This pulse generator *was* working, but the NiCd battery was dead, so I removed it. After repairing the track damage on the CPU board I powered it back on, to find it was displaying E11. Odd, since I

I have been trying to get a second 141T mainframe going but have been seeing some rather odd traces on it. I'm using a pair of known good 8554B and 8552A plug-ins from my other 141T to drive it. The

Hello Folks, just made the decision - I am going forward with the HP keyboard emulator. Sadly, I dont have any HP HIL equipment in house. My question is, if anyone of you is willing to sell or lend