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Hi: I think that high concentration IPA might... but only after prolonged contact (like soaking a part in it, in a closed container) partly dissolve some of the binders, or plasticizers, in rubber or

It looks like the link has been filtered out.? Just google the title. Bob

Sorry, Craig Sawyers got there first! David

I see the e-mail address has been anonymised, the missing bit is talk21.com Roger

David, I have a 7934 which is in good health apart from some damage to the storage meshes at the front of the CRT, works fine in non-storage mode. I have been hoping for some time to find a good CRT

Before totally giving up on it, you may want to check the HV filter caps and rectifiers in the cathode circuit. I don't recall if these use the old ceramic type, or plastic caps - ones typically rated

For the general information of the group, here is a link to determine characteristics of various solvents, etc.? It provides more information than you will ever want to have. The Most Complete Free

Hi, I had bought a DC508 option 1 for my TR502 7L14. I need to install option7, TM503 is option7, manual is very clear, but It will be very useful a detailed photos from cables and connector. Has some

Hi: Lots of companies sell it. I see it on Amazon for 13.00 U.S. a gallon (4, 1 quart plastic bottles.) It is very hydroscopic (absorbs water from the air readily)… so unless you store it over a

Wait a minute Fred. At least one of those 7A29s should have the variable delay option... Still happy=;)? Albert

Colin, thanks that was my thought also. Checked with the site nothing there. I did send him an email letting him know that Q service had a complete service manual with schematics for the 2212 on CD it

I've reached the end of my repair efforts on this 7834. I'd hoped to fix it and sell it, but I'm not equipped to rewind the transformer and I need the space it has occupied. So if anyone in the UK

Hi Tom, Thanks for putting me on the right path. Indeed, there was no continuity between the pads of the x10 fingers. Redid the IPA thing, and now I have a signal at all settings! On to the timing

My guess also would be the X10 attenuator. These attenuators can develop a connection fault inside the module. It *can* be fixed with a small soldering-iron and a steady hand, once the top has been

This happened to me a week or so ago. Like you I accidentally marked a message as spam in yahoo mail.

Hi Folks, ? ? This is a test for me to make sure I am re-subscribed, and a warning to others to be careful. ? ? I use Yahoo mail to read my tekscopes group messages (perhaps I should not use Yahoo

If the 5V/div range is also faulty, my guess would be the *10 attenuator. Have you tried applying a signal to the faulty channel's input, and using the /other/ channel to follow the signal forward

When the EHT transformer is connected to the 25kHz HV drive, then pin 13 on the control IC hits 0V pretty much immediately after the inverter starts causing a shutdown after 10mS. Anything below +50mV

The fingers are gold plated and looked very clean before I IPA'd them. Is there anything else in the circuit that could be causing the problem? Here is the relevant page from the service manual:

Thanks for the help, all. I have a lead on the 2216 service manual. The 2216 operators manual is at the vintage tek museum website. It will be interesting to see how much the 2212 and the 2216 have in