开云体育

Dear forumers, I need help for my TDS-524A showing no trace on any channel. Recap and board wash performed succesfully time ago. Self test is OK, no error in the log. I am pretty sure it triggers

This is interesting. With my small business, I've shipped lots of packages around the world; the vast majority of customers choose First Class because it's cheapest (these packages are 2-6 ounces

I have two 2445's and one 2445B for sale for $150 (for all three) if anyone is interested. All are in working condition, hard copy 2445 manual and CD of the 2445B manual. Front covers with the

I checked the triggering section some more and it seems to work as I would expect. Setting it to normal and adjusting the trigger point does change what I see on the screen (I just have to hold the

No Mark, I did not get photos yet. I still need to open it up when I run through the calibration and will take a few photos then. I did put up a shot of the defect in the CRT. Regards, Tom

On 1/26/2013 1:22 PM, Tom Miller wrote: > > > This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10. > I was able to find, for a very good price, a bad 2215A that

As they say: Ain't that the truth!!! Dave

My business (in Israel) is geared to repairing PCB's (as opposed to complete machines) from customers all over the world. PCB's are light, can be properly packaged to survive attempts to damage them,

There is no two terminal replacement circuit for a tunnel diode which could come even close to their switching speed. As far as I know, all later Tektronix trigger circuits used integrated

I am not exactly sure when Tektronix started using tunnel diodes but the 545 lacks them while the 547 has them which explains the later's outstanding triggering bandwidth. It may be that they had the

Amazing!? Tunnel diodes in a 561A! Tek must have started using tunnel diodes shortly after they came out in 1960. Leave it to Tek to go with bleeding edge esoteric. Since I'm a rather low budget

when looking at any signals between 85mhz and 110Mhz, the spec an won't lock on frequency (wont center). It will jump above and below the frequency and inidcate failure. Everywhere else in the

Sorry to jump in with questions on another person's original.I did change the subject line so to not dilute the original thread. I have not seen anyone suggest putting together a trigger

I think the TD is the problem. I got a similar problem in my 3B4 plugin. Try to detach one terminal of the TD CR566 (using adequate protection against heating, like a pliers) and check if the

Hi Stan, It's up to you and your wallet as to picking up a spare set of tunnel diodes. For me, it seems that parts 475 scopes are available at good prices. Since there are four TDs in each scope,

You need to find another post office. The clerks at some of the big, busy ones don't like it when you "waste" their time getting acceptance scans and a receipt, since you could just drop them in the

I used the same military manual from Bama. I had two reasons not to suggest that the tunnel diodes are the problem: 1. The common failure point for the symptoms does not implicate the tunnel diode

Well, at least I started diagnosing on the correct page this time. :) You could grow old thinking about all of the things that could go wrong with a 7T11. I have had problems with the board to board

Hello Tom, I will gladly avoid touching the tunnel diodes, and will start with David's suggestion. The only service manuals I have are from BAMA, which are the Army TM--- model manuals. Will these