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A friend of mine just purchased an old Tek 570 Vacuum Tube Curve Tracer that hadn't been used in decades. He is a competent technical guy, but wasn't too familiar with old tube scopes. I made up a

"glad to hear the DC/DC converter is working that should be a relief. so why is the Ac-Dc linear causing an issue??" I found out it's not. It's the voltage. "The Chopper xsistor is not too

I popped out the transistor pair in the downstream A trigger view circuit and the voltages didn't change, so that leaves out that circuit as causing problems. So I did like Fabio said and pulled out

I think this one is 6CW4 , if interested where do I mail it?

I would like someone to help me to figure out why my trusty 464 won't keep the sweep going. I do have shop manual. The scope been sitting on my desk , unused for over two years. As far as I can

That's the same one from the ebay link - same vendor and manufacturer too. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/

First find from my friend Google. https://www.amazon.com/BNC-Tool-Connector-Tightening-Wrench/dp/B00MEW0SCM -- ----------------------------------------------------------------------- Glenn Little

And here's one covering the installation tool. https://patents.google.com/patent/US4759122A Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/

Just wanted to contribute to this compilation of long-gone electronics surplus dealers. From the late 1960s through the early '80s, I knew of three such stores in the northern Virginia suburbs of

I just stumbled across this about BNC repair: https://patents.google.com/patent/US4416143 Ed

Tek had a very strong "do it ourselves" attitude. Since they had to make many jigs and tools they made many of the tools even one could buy them I use to have a small collection of parts used to make

Lorn... Ah, in time... about your writing: Since between pins 2,3 and pin 1 there's only the base-emitter junction of the IC's input transistor... if the input is at 0,7V or so, it's expected that

A quick search found this in a few

Dennis guesswith the pictures is correct. It was made by Tek. Tek had (when I was there) part of it's model shop a tool modification and manufacturing department. There was at one time a catalog of

hi Lorn, On your previous writing: Look carefully... it's more likely it's socketed than not. Tek used a lot a kind of socket that is made of individual socket pins that go directly on the board...

Hi Larry, I just uploaded some pictures of the tool. They are at /g/TekScopes/album?id=45980 Dennis Tillman W7PF

If I'm not mistaken, 1/2" 6061-T6 aluminum tubing with two slots cut in it 180-degrees apart would do just about as nicely as anything for that. Thanks, Barry - N4BUQ

Yes, that BNC T-wrench on ebay is yet another form of installer. I have two different kinds from long ago, both commercial tools, but I have no ID or source info. One is made just like a nut driver,

Hi Peter, Besides the check to the power supply's capacitors, as Chuck noted and, as you will notice follwoing up the threads, is a kind of "standard" advice for all equipment of this vintage... It

On Wed, 25 Apr 2018, Larry McDavid wrote: Here you go, works like a charm: https://www.ebay.com/itm/260762732798 I bought this exact wrench couple of years ago and very happy with it. > Someone