Hi, Richard. If you want a working 7S12, I have one for sale (it does have a crack in the Time/Distance crank knob though), along with a 7S11, two S-4 sampling heads, S-51, S-52, two S-53s, and a

If you search the archives for "Tektronix Blue paint" and "Tek Blue Paint" you'll find posts by Reed, Roy, John and Bob that have all the numbers and corrections for the paint. Then under "Tek Blue

Sorry, I forgot to add how I tested the individual boards of the PS, while separated. At one point he flowchart says to remove comb P232, and later it says to remove combs P233 and P234. When

I tried replacing the 2N3904 with a 2N2369A and the result was only a marginal improvement. I have updated my notes here. I think I shall just go with reducing the pullup resistor to 6kΩ.

Hi all, here a quick update on the PS repair so far.... Broken and replaced are: (upper left corner down to lower right corner) R1050, Q1021, Q1022, U1030, Q1050, R1052, CR1030, Q1030, R1030,

Unfortunately when sending an instrument in for a calibration, if it meets the tolerances it's passed and gets a sticker. The terminology is As found, As left if you get data with the cal (which

Hi Stephan, thats probably the ones that allow me to recover good units out of our companies trash bins... :-/ cheers Martin

Message 169177 has the formula. https://groups.io/g/TekScopes/message/169177

Gee, I thought I solved this TEK color dilemma for you guys once already. :-) So, once again, here is a link to the correct TEK color - all ready to purchase in your preferred professional paint

Hi Jeff! I'm pretty sure that the original paint was a lacquer. I say that because it drys quick and can be fixed without a complete strip and repaint. That's exactly what manufacturers look for

IF somebody can find that formula, it should be posted in the Tekwiki site. Then ANYBODY could go to a Sherwin Williams store and get that made up. With the formula they can make as little as a pint

IF somebody can find that formula, it should be posted in the Tekwiki site. Then ANYBODY could go to a Sherwin Williams store and get that made up. With the formula they can make as little as a pint

Hello on my 7904, I have never noticed this issue. After you swap timebases, you can also try to exchange H and V, to aid debugging. I would check the 7904 serv manual for the trigger selection

Bonjour, Color matching is an art as well as a science. Adobe took many of its top scientists to a week long seminar on color! The industry standard is Pantone,

Dennis many thanks for the fine notes on the motive to replace the stock incandescent lamps with LEDs. On 2465/7B, 7904, 7104 have got many scope photos with dimmed graticule and dim traces.

David: I doubt that the lytoics and divider resistors would produce that symptom. The HV transformer is most vulnerable, as it dissipates heat and has insulation that degrades over time (crazing,

David, Have you recapped it? If so, then check in the high voltage section. There are some resistors that are known to go hi or open. They are: R1871, R1872, R1853, R1854 and R1991. The first two

I just tested that it does actually but only on the very extreme right of the scope and outside the graticule area there is some very weak excitement of the phosphor. But I was only able to tell in a

Today, I noticed a problem on my 7904 that I've not noticed before. Running in ALT vertical and ALT horizontal mode, so the right vertical signal is displayed using the A timebase, and the left

Hi Ed, Remember that if a can of some rare color lacquer loses propellant, don’t automatically toss it out. You can always puncture the can and recover the paint into a 1/2 pint paint can. You can