Please check that the clocks and bias voltages for the CCDs are clean and correct. You could have a problem with a clock (bad amplitude or timing) or a bias voltage (bad value or noise) that keeps one

Check that the blanking (unblanking) is working correctly. Your backwards trace motion could be retrace.

I also had a blue one disintegrate to dust on my 7904. I put shrink tubing (blue) on every other pin. The wire to wire bonding in the flat cable keeps them in order but I drew a diagonal line across t

Swap the attenuators between the channels. If the problem follows the attenuators you have a bad one. They do fail.

https://indianapolis.craigslist.org/ele/d/indianapolis-tektronix-516-oscilloscope/7457356704.html Craigslist 516 in Indianapolis, $150. I don't know the seller.

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.

7B92, S/N B052568, No Sweep, Help! Thanks Miguel, TP321, and R765, have ~60mv, ½ usec pulses. So pulses but probably not functional. I went back and checked carefully on all pins of U310 and found, in

7B92, S/N B052568, No Sweep, Help! Since it has been almost a year since my 7B92 arrived in my new-to-me 7904 I’ve decided that it is time to make it work. I’ve re-posted with a new title since it may

7B92, S/N B052568, No Sweep, Help! Since it has been almost a year since my 7B92 arrived in my new-to-me 7904 I’ve decided that it is time to make it work. Test setup ‘92 installed in right-most slot

If you are ever going to adhesively bond (aka glue) any part of the assembly I would not use any silicone product. They are almost impossible to remove and adhesives don't stick to them.

Nice UTube on home made Mag-Amps https://www.youtube.com/watch?v=DBX1-POuJMw

I sit corrected, there is a 127 for 7000 series plugins! Anyone know where to find one? None for sale on ebay or google.

What you need is a Tektronix 127 for 7000 series plugins. Don't look, it does not exist, I've never known why. Get a clapped out 7603 and use the vertical signal out to get a single channel. For two o

Cataracts not only scatter they are also yellow, that is minus-blue filters. I know that after having my OE lenses replaced all colors, but especially blues, were more vibrant. Have you had cataract s

I confess to not having read everything in this thread but it seems that a Tektronix 127 will do what is described. If you want to understand the 500 series interface I'd recommend going through the 1

McMaster Carr has 946 different sizes of Oil-Embedded Sleeve Bearings. One might fit with minor adjustments.

Bill, My recommendation would be to, after due deliberation, decide if you are going to Repair, Rebuild, or Restore. They are very very different in terms of how long you and your 'scope will be out o

For less than ~$100 in parts you can build your own. For example see the last page of https://www.digikey.com/htmldatasheets/production/80467/0/0/1/ltc2485-datasheet.html. The ltc2485 is a 24 bit ADC

Good catch. I now note that the 535 which is offered is Grey, not blue, and has square corners. The lower left corner of the photo in question shows blue and a rounded corner case. Sure glad I did not

https://detroit.craigslist.org/wyn/msg/d/livonia-tektronix-535-vintage-tube/7271634106.html