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Third update: I made some experiments and found out that, once I let some current flow (200mA), the blinking stops and the display is steady. Then I tested the module in may "Rack"-TM5006 frame, and

I can only speculate why the 741s didn't like the unfiltered rectifier output as +Vs, but suspect the capacitor at the (+) input may have caused excessive input current as the device was violently

On Tue, 16 Mar 2021, 22:42 Ozan, <ozan_g@...> wrote: > > > > I checked the DC recovery diodes in the HV supply as listed in other > thread > > (all under the plastic cover and they are ok. > >

wrote:

I'm not sure what's going on today I turned it on and I measure 2963V on the HV spot. 50V point measures 49.73V

Hi, After having repaired several scopes (not only Tek's, but other brands also) with this symptom they invariably had leaky DC restorer diodes. Testing these diodes for leakage must be done at high

Thank yuou Clark, I will do. Next week-end i'll try the complete program. Max

Hi folks, I'm getting ready to move and need to find a good home for a 547 with 1A1 and B plug ins. Dusty, but stored in a low humidity storage area. It worked the last time I powered it on a few

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