Norway Labs made extenders for the 49x SA's. I am not sure if they still have any, but give them a call next week at 503-924-5846.

Polaroid made a film holder for the integral films, ie, SX-70, 600. I don't recall the model number. The issue with using that is, all integral film cameras have a mirror to flip the image, as these f

The dark spots are caused by differential aging of the storage target, a common problem with the Tek storage crts. Also, the storage board needs to be adjusted. You should also clean the storage contr

Tony, Clean the beam find switch. If the contacts are dirty, all kinds of strange problems can occur.

The LCD display on these are miserable.. An early electroluminescent backlight with a heater for cold environments, difficult to read in almost any condition. If the display is bad, ie, looks like it

Try it sometime, I have literally done hundreds this way. Some last week..

An easier way with the modpot is to apply a drop on the red "square" on one side. It flows directly into the the track, sort of... Sometimes two applications are required.

I saw the explanation for the rubber pad, I think on the VintageTek site, from an engineer on the 2465 project. The reason the pad was included was, there were incidents of the input attenuator cerami

Walter, I have a service manual for the 224 s/n B03000 and up. Yes, the input channels are isolated to 600 VAC RMS.

I don't know about the modules, but from the picture on tekwiki, the substrates are likely mounted with adhesive, and therefore virtually impossible to remove intact, especially in a complex assembly

They must have changed the cal output circuitry on the later models.

Great! Calibrator risetime? Isn't the cal output specified at about 250ps? Both of my instrument measure it about 300ps.

Yes, Luis has done great work! He is in South America I think. Ascertaining and sourcing the correct parts can be difficult.

How well I know. My last job in the hybrid business was at Teledyne Microelectronics. Space Qual parts had reams of paperwork, x-rays, PIND test,photographs, etc... Tek, Keysight, and many other still

These are thin film hybrid microcircuit assemblies. Easy enough to repair IF you have a well equipped hybrid lab and access to the right chips. Figuring out the correct parts, and then finding the die

I have been following this thread with some interest, as I have a 11801A that had dead TB NVRAM, and a 11801B with all (still) good OEM NVRAM and batteries. I don't think there are factory only cal co

At KO4BB there is the factory diagnosis manual. Pretty cryptic, but has lots of information. Service manuals are available, but no schematics..

The first thing always on these is to replace ALL the small electrolytic caps on the power supply board. These are 1980's scopes, and all the caps are past it. Get the power supply working right, then

The cursor keeps moving after the knob is released? If so, the spring wire "switch" on the outside of the control is dirty and not making connection. clean it.

Where is the burn? Can you post a picture? I just finished two of these PSU's, I think you need to replace ALL of the small electrolytic caps, don't bother testing, etc, just replace, they are all pas