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Hi Dennis, I'm glad to hear of Marian's success!! I've had my knees replace 4 times (yes, I have only 2 knees) and both my shoulders replaced. In all cases, the operations were a success - it just

Update :- Q923 (TIP30C) is indeed a 3 pin short <1 Ohm in all 3 directions. Also Q913 (TIP31C) is essentially just a double diode with no gain Q912 is OK Q950, and Q960? (both TIP30C) are OK C914

All- I have two 576s that I will be refurbishing as time permits and I am wanting to have parts on hand when I decide to dive in to the project - can someone confirm that the eight can type capacitors

Yes, that is the one I found ... the one that refers to Q9070 which I cannot find on my schematic. Dave

Hi David, here is the link to the original document made by Hakan (aka Zenith): http://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf Hope this helps, Leo

For the record I find it is Tek part no. 670-2940-00. It is given in the components list, not the hardware list. The 7A12 parts Dennis mentions are 670-1077-01 and 670-1084-01, right and left

Hi Jeff, I only looked at the power supply schematic briefly but I can't see a +40V supply feeding the mainframe. Only +40V label I can see is at pin 7 of P890 but it is expected to be around +29.7V

I had my first experience with letting the magic smoke out of something tonight. The new filter caps finally arrived from Mouser and I replaced C806. I then put the power supply partly back into the

Oregon Public Broadcasting is the media who produced the program. Public television concerns are known for producing documentaries, you know. You can pick up a copy from VintageTek store on their ePay

Hi Szabolcs, I am VERY impressed with what you are doing. I think what you figured out is extremely clever. I hope this suggests possibilities for other members to think "outside the box" for ways

Hi Esmond, The 7M13 has always been one of my favorite plugins for over 35 years because: * They were always listed at ridiculously cheap prices; * They were so good for documenting the scope photos I

Hi Joe, Fortunately we don't have a horse any more. When our daughter moved out of the house 15 years ago she took her horse with her. He is still with her. Everywhere Starbucks moves her to, they pay

I don’t think they need rights. It’s in the public domain.

It may be some conductive residue. HV section have some high M-ohm resistors, any conductive residue will change things. 2800V is low (looking at +50V supply and opamp inputs is still a good debug

The BSM connector for my 3S2 trigger output is cute, but I traded cuteness for "connectability"... I replaced it with an SMA since I couldn't find a BSM to BNC cable anywhere, Tek original or

They are, but are they as cute as the BSM connectors on certain S heads?

The doc I found online was called "troubleshooting_tips_on_2200_ps.pdf" but as I said it talked about Q9070 ... Dave

I looked for that document in the files section but failed to find it :-( I even tried search terms like 22xx and supplies. I found a doc on line but that talks about Q9070, a FET which isnt on my

Thanks so much for your reply, it makes it much easier to approach. I cleaned up the HV test point and I get now some 2800V. What makes me little bit nervous is I don't know if the cause was just the

It could just be galvanic corrosion. The graphite in the conductive foam is at the very top of the galvanic series (https://en.wikipedia.org/wiki/Galvanic_series) and can corrode even noble metals