Beware all ECL is ESD suseptible, use static precautions Jon

Just a bit of an update on the X-Y mode troubleshooting so far. While a trace is running there is a sweep angle on both plates as might be expected. In X-Y mode there is 100VDC on one plate, zero

Euh... that looks like an AND gate to me... An (N)OR does not change output state until all inputs are low: the OR goes low, the NOR goes high.

I have a question about the options that this scope has and X-Y mode. On the back it lists: Opt 4 Mod (stamped on chassis between the two option labels) Opt A2 What is option A2? I can't find a

Been trying to put together a list of caps to order since if I'm going to replace one of several identical capacitors then I might as well replace the whole lot. So far definitely replacing the

The 465 doesn't have the Tek-special IC like the 465B has, so that makes it a bit easier/cheaper to repair. The B model is actually fairly different from the original (Tek skipped "A" and went

I have three Tek 2445's available for parts or repair. Two 2445's and one 2445A. They all have different problems. You can see them on eBay or I can send you photos. I will sell them direct for

Looking at the schematic, that diode is a halfwave rectifier for the 95V supply.  Not a Schottky, not a Zener, just a good ol' silicon junction diode. So you'll need a breakdown voltage of 2x 95V,

I am looking for advice and adult supervision on two items with my project 465M. Item 1: I believe that I have confirmed that the HV Multiplier is bad. My plan was to fabricate a new multiplier, pot

I revised my view that the counter was faulty in the light of this information. The unit is essentially designed as a prescaler (÷10, ÷100, ÷1000). and for counting requires an external timebase.

The 1968 data (OR) seems to argue with the 1966 data (NOR). A low level input on any of the inputs gives you a low level output. RL

It's in the 1968 'Integrated Circuit Data Book' (in hard cover. Or at least the MC1217F is Saturated Logic input (6.2V to 1.2V switching) - ECL output Quad input positive logic OR. (four diodes with

Thanks for the tip, the manual is usable. I would like to find an actual print manual, however. It makes sense that it is a military tech manual, I saw and used most of these scopes in the Air

Oh, no problem at all! -- Cheers, Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 http://www-smirc.stanford.edu

Maybe this http://bama.edebris.com/download/tek/561/561scope.pdf

Thanks Tom, I should have checked. Nevermind :-)

I didn't check to see if my reply had also been a victim of collateral damage, but I'll reiterate that the 465B and the 465 are significantly different. The 465B does use a Tek custom IC (the "spider"

I am looking for the manual for an RM561 B rackmount scope, I can't find a download or for sale on the web. I can find the regular 561, but the B is different. The mainframe has been hacked on, so I

On Tue, 13 Oct 2020, - wrote: https://www.datasheetarchive.com/pdf/download.php?id=24af7b4875fe916a340b52c0b1a28a25290338&type=M&term=MC1217 Semiconductor Chips Data Book 1976 Original

This has been a lot of fun to follow. I do not have a 2465A. I do have a 2465 and a 2465B. I hope you put your photos and a summary on this site for future reference. Thanks for the fun,