开云体育

Can you use Kapton tape instead of paper? Jared.

Here is a link to the service manual: https://w140.com/tekwiki/images/1/12/070-1195-02.pdf Here is the link to the transformer winding details I just uploaded:

Hi, My 7904 HV transformer in the PSU is giving trouble. There has been corona type discharge from LV secondary windings and on taking it out the transformer paper is burnt away in places. I guess it

The 2n5566 jfet was not working properly, the part listed as Q604A in the 177 schematics . I’ll try to change that one and see if the problem will solve. Do you think that this faulty jfet could be

Thanks for your reply, the calibration and the relative adjustments were done when I brought the tracer home a month ago and it passed all of them. Now the traces are 2 vertical division in the 10 mA,

One thing to note that is really important on the 577/177 is there is a calibration routine for the 177. This needs to be completed FIRST before the frame (577) calibration will converge. If you are

On Sun, Oct 13, 2024 at 11:07 AM, Dave Voorhis wrote: > > > > I have two 577s and haven't seen your problem, and changing the intensity > pot itself almost certainly had nothing to do with the

I have a major update, today when i switch throught all the minor vertical/div settings the yellow light of overrange doesn’t light up, when switching by the 50 to 20 and 10 mA i’ve noticed a lot

I have two 577s and haven't seen your problem, and changing the intensity pot itself almost certainly had nothing to do with the problem. It sounds more like there's been some reassembly blunder or an

The curve tracer was fully operational,i ran through the whole calibration/adjustment steps when i brought it home, than i realized that when I tried to set the intensity the pot was moving but in a

Do you have a normal looking trace? Those two pots are in very different parts of the circuit. R1245 seems to set intensity, and R528 is in the horizontal offset circuit. Maybe give us some more info

Hi all, i bought a month ago a tek 577 with a few fixtures, tested a few times and it was working but was a little out of spec, so i’ve dediced to do a little calibration and found out that 2

I have this scope here and it is doing weird things. First thing is when the Diagnostics are run, it displays a couple errors. "Processor" displays Result 114 with 1 Failure Count. "Acquisition"

There's a ton of them on eBay. Burt, K6OQK

The Tubestore has them for $20 each. That’s not a bad price. https://www.thetubestore.com/6gm8-ecc86

I don't know of any equivalents for the 6GM8 or ECC86. It's a special dual triode designed to run at very low plate voltage and the maximum quoted in the datasheet is only 30 volts. If you have a tube

Try a ECC86 http://www.r-type.org/exhib/aaa1161.htm Dave G8KBV.

Are there substitutes for this tube ? I che3cked mine on a TV7 tube tester and got 0 reading for transconductance test. I thought the TV7 manual had wrong settings but I think its right. Regards,

Understood. So if you didn't do anything except take it apart and then reassemble it. The most like issue is a cable that is not on right. Very difficult to diagnose that over messages. Also, the

Hi, I didn't recap, everything is original.