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PLEASE! Enough about Laugh-In. It was stupid then and now, in retrospect, it is extremely stupid. It is not relevant to the majority of TekScopes members. Dennis Tillman W7pF

Diode connected BJT (where that mean base and collector are connected) are frequently used in current mirrors (in integrated circuits) ... but that's for temperature compensation reasons. Diode

LN2 is apparently pretty cheap if you have a supplier to sell it to you. I knew I should have picked up a dewar from the university surplus store in the old times. If they ever open it up again ...

How much for a clean working PG506? I'm in Anaheim, California.LarrySent via the Samsung Galaxy S10

Very clever! I never thought of that. There was a time I could have done this and I know exactly how it works. Yes, there is a risk, but as you point out it involves no dangerous chemicals or careful

I can vouch for Craig, I bought a TM5006 filled with calibration modules from him, and a second purchase of 2467 accessories. He's legit. :) Regards, Jared.

I recall the series as "Rowan and Martin's Laugh In". The actress who was persuaded to say "Sock it to me" was the attractive Goldie Hawn and after having said "sock it to me" or something that

Brad Thompson wrote: It was being shown on Decades TV, not long ago. It might still be. Two episodes, M-F from 7-9PM, EST.

I mentioned earlier, that you should look at adjusting the new XO center frequency to get the tracking range to line up better. Also check the 7L13 calibration, which may include adjustment of its XO.

Hi Jouko, Rise times add approximately in root-sum-squared fashion (square each rise time, sum them, then take the square-root of the result). So if you have a 2ns rise time amplifier in cascade with

Hello, I tried by swapping one Q150 from working unit. That brought input signal to screen. I acquired two Q150 as both channels were similar and showed only 340k input resistance. Those are now in

Hello everybody, I am writing about the attempt to transform my TR503 into TR502 to use it with the SA 7L13. I started by replacing the 55 MHz crystal with a 52.5 MHz one (thanks James) and after some

In my experience, there is epoxy, and there is EPOXY! The stuff used on IC's, is EPOXY! The stuff used for potting generally has additives that make it epoxy. One thing they don't want to happen in

I de-pot epoxy potted assemblies frequently, and I use heat. First, I put the device in my environmental chamber set for 150C. When it is good and hot, I bring it to my bench, and use a combination of

Brooke Clark on his PRC68.com website reminisced about his days working for Aertech testing tunnel diodes. This excerpt is gratuitously stolen from his website: "Early tunnel diodes were made by hand

Hi all, I still wasn’t able to solve the “ripple” issue of my 465B. Apparently, as someone mentioned at some point, there is effectively 2 triggered traces. I could clearly see them. I have no

Nenad Filipovic If you are interested I have some working units available for sale. Contact me off list for details. Craig

I own a pg506 taken as broken (really broken, no powers up) for about 80 euros 5 years ago. Repaired, ii works since then. It's the only TM500 plugin I have, and I use it to calibrate 7000 mainframes

Hello all: PG506 are tricky to buy on epay: hard to fix as cleaning the switches or replacing certain ICs is not easy. Virtually no sellers on epay can properly test all the functions. So expect

C-B junctions can often be used as low-leakage diodes... I'm surprised that E-B are also considered low-leakage, given the low breakdown. Must do a comparison some day :-)