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That note on Sphere's site is interesting. The only comment I have is he recommends using a 1N4004 diode. They are way too slow for use in the inverter circuit for the -100 supply. The slow Trr will

Interesting, When you swapped the tube on the 2232 did you have the 2 flying 4pin leads connected to the top board? If they are unconnected the display is all over the place. JC

Thanks for the link. It makes for interesting reading. At the very end, complete conversion kits are mentioned for specific instruments like the Tektronix 500 series CA amplifier and the

Then why, when I installed the -00 tube into the 2232 scope with no connection the pin 12, the display was completely unstable when the beam moved around. The image size varied depending on where the

Hi Tom, Take a look at the schematic for the 2215A, the CRT page. It shows pin 12 connected to a negative bias generator off the 100 volt winding. In my tube, there is a lead running to the front of

I second Tom on this, the only difference between the -10 version is a longer HT lead due to the updated multiplier having a built in socket instead of a flying lead. I do have duff versions of both

Thanks for your message, I will try to answer as much as I can: -the menus and graphics have no problem -the full self test from the menu passes ok -SPC passes ok -reset executes but no help -autoset

It was in the attachments area. I created a new directory in the photos section and put it there. I'll add more info later. Tom

Hi Tom, Thank you for posting a nice summary of your progress, but there is something wrong here. Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which

I would like to question the differences between the 22xx and the 465x CRTs. Mainly because I have a few spares on these ( 465x) and, of course, as the clock keeps ticking the supply will continue to

If the video RAM was bad, I would expect it to affect the on screen menus and graphics, not just the trace. It's odd that it passes the self test. Have you run the full self test from the test menu?

I just stumbled onto this blast from the past while looking for other info, and immediately remembered this discussion. It looks like Teledyne had the direct substitution problem solved in the 1970s.

The scopes have been spoken for. Thanks Bob

Tom, I must have missed that. What folder did you put the pic in? I can't seem to find it in the photo's section. Thanks, Mark

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 2445's,

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