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Gregor The TR502 is the matching Tracking Generator for the 7L12 I believe. AS I recall the LO freqs are different between the 7L12 and 49X series.I suspect that the solution for modifying either the

In a message dated 3/23/2004 4:46:17 PM Eastern Standard Time, watchguard@... writes: The burn in was ended early ( 3.5hrs ) with a cloud of smoke, large bang (possibly a new universe

That event was serious stuff, and could have ended much worse. It reminds me of a Jaguar mailing list that I used to admin. We got a mail from one of our listers sons, asking for his father to be

Ouch, well I think I'll add a steel helmet to my workshop kit.

Before you try to clear a short, you should be very sure that it is indeed the tube that is causing the control failure. With the CRT out of the socket, or atleast with the filament

Hello all - A friend gave me a replacement CR tube for my 545B that has an odd problem. When I plug it in, the brightness goes to full, and can't be controlled. Suspecting leakage from the

As wise Jim Williams says: it happens only when you start feeling your oats. Regards Miroslav Pokorni

Foolish...no,Freaky...yes. I am very careful around HV CRT's & other potentially hazardous items, but I have been doing electronic design & repairs for 35 years. Recently I was repairing a DuMont 274A

You are correct that the 5103/D13 is also known as a 5113. Stan w7ni@...

My DSA602 has a reference SAW 500 Mhz oscillator with a 5e5 stability. Does it make sense to replace this built in reference by a much better one ? I have a 500 Mhz 1e11 ( tau 1000 sec )

Hi folks I recently bought a 7904, cleaned it up and calibrated it and it is a source of joy. One problem is that it is Option 1, which deletes the readout board (there is a so-called dummy board in

Hello Folks: Does anybody have any general information on this model; dates of manufacture, common problems, unobtanium parts etc? TIA John Foster.

Hi, I'm new to the group. A friend of mine recommended this site to get in contact with those who might be interested in old Tek scopes. Well I have a Tektronix 536 with Type T timebase and Type CA

Hi, I'm new to the group. A friend of mine recommended this site to get in contact with those who might be interested in old Tek scopes. Well I have a Tektronix 536 with Type T timebase and Type CA

Does anyone have scanned manuals or schematics for S-51 (Count Down Trigger Synchronizer Head) and S-53 (Trigger Recognizer Head) that could be e mailed? Thank you, Miroslav Pokorni

the if top (7A26) couple insight This sound's as a defective vertical channel switch.... The same symptoms you would see on a 2445..2465 with a bad channel switch. I had a look at the 7704

Hello all - I'm trying to bring a 7704A back into service after several years of downtime. Everything seems to be working with the exception of the vertical non-linearity I'm seeing. For example -

There's currently a thread in sci.electronics.design on the subject. I posted some links to my spot welding experiments and some commercial data. mike

I need to know which pot needs to be adjusted or a pointer to where to find the info. Everything is fine with the scope, except that the vertical gain calibration is off quite a bit. Both channels