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1. No sweeps seem to work 2. The opamp outputs look close enough that I'm inclined to assume they're doing their job 3. THO on U900 appears stuck high for all front panel configurations I could test.

It's probably worth mentioning that unless you're planning on re-calibrating the scope, you'll want to swap the sweep hybrids back. Part of the calibration is to compensate for R/C on-hybrid component

Incidentally, it may help to understand what's inside the hybrid. If you're wondering, take a look at page 6-59 of this document < http://w140.com/tek_made_sm.pdf>. There's a fair bit of "stuff" in

I've tried cleaning U500 and U900 to no avail, and then I swapped U900 and U700 again to no avail. Will continue searching for sweeps that might work and looking at that opamp.

I suppose it might be possible to ask a more obscure question, but this really is a long shot. Does anyone have any information on the size of screws used on the aluminum backing plate for the screen

Mark, Thanks. I have to drive 150 miles round trip to access IEEE papers. I'll be collecting lots of NLTL papers the next time I go to Little Rock. At the moment I'm working on deriving the equations

I would start by pulling, cleaning and re-seating U900. Second perhaps swap U900 and U700. If that doesn't help, you might be able to narrow this down a bit by experimenting with various A/B sweep

Hmm... I've not heard of the tidbits before, although I use IEEEXplore fairly often at work.? ?I will try it tonight from a real computer.? Not so much fun trying to read serious articles on a

You could try swapping the A and B sweep generator hybrids U700 and U900, they are identical part numbers. There should be some recommendations here about cleaning the contacts (carefully!) if the

I wrote a "tidbit" on NLTL patents for Microwave Magazine. You can find it here: https://ieeexplore.ieee.org/document/7484899 There's quite a bit of history in NLTLs, so one can spend days/weeks

It’s not. The proper lights come on suggesting the scope is trying to run the B sweep, but it isn’t running.

I acquired a non-working 7623A a few months ago which included a few faults in the storage control board with four 74xx ICs having failed, two monostables and two logic ICs. This meant that I actually

Is it possible the switch isn't operating when you pull the knob out?? There is a plastic piece between the knob and the switch that can be broken.

Does anyone have one of these they can pop the cover off and take a photo or two, or have the physical pinout of the CRT so I can match up the wires?

Okay following the video of w2aew (https://www.youtube.com/watch?v=54roz8IUoVI), I'm now a bit more confident I'm not goofing something up. Pulling the SEC/DIV knob doesn't result in an intensified

Hey All, I've managed to find some time to play with my 2467B and have been trying to untangle whether the non-working CTT option (CT TEST 86 FAIL 02) has broken the B sweep or if the B sweep itself

Thank you!! I just bought the user manual, so I'll be scanning it when it arrives. There is a paper copy of the service manual on eBay for $35 which I will buy if the seller will verify it is the

Seem to be a hard one to find. I scanned mine and you can find it here for some time: www.hakanh.com/dl/temp/11801_Service.pdf It is OCR'ed and bookmarked. Feel free to upload it to TekWiki. /H?kan

Thanks for the replies. I tested the batteries and found that the memory board one was reading almost 0V! Have just replaced, but unfortunately to no avail - still same error. Whilst doing this I also

The fast storage mode had almost no contrast, even straight from the factory. It is normal for them to sport a comfortably bright background, with a ever so slightly brighter trace. The difference