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You are correct about 4 to 5V being the magic zero TC. That wasn't my point. In 1970 the reverse B-E junction cost less than 1/20th of a Zener diode. No need to use reverse junctions today. Zener's

Hello, sorting some of my plug-ins in very different condition I have come across the following "almost twins": 1. A well known CA plug-in, in working order, has always been a good work horse with my

A reversed E-B junction is approximately a Zener in breakdown. Silicon transistors tend to have about the same reverse E-B breakdown near 5-7 V, regardless of size. There's a low level clamping

?Does anyone know a fix for the question marks that keep being randomly inserted in my posts? <--- That one is intentional :) Dave Wise Safari under MacOS

?I seem to recall that the degradation takes the form of low beta at microamp currents. I hope that's all it does, because at certain settings, my HP 740B's zener a 2N3053 switch 20000 times a second.

?I don't consider $30 a pop "rational". Anyway, improvising and adapting are sports I enjoy. Dave Wise ________________________________ Sent: Sunday, February 21, 2021 9:28 PM To: [email protected]

?They're being used as: 1) current source, 2) cathode follower, 3) top half of a cascode. Within limits, mu and gm aren't critical. It is so easy to try I'd be ashamed not to.? Dave Wise

One can also do this with JFET, and FET, transistors too.

I'd want to know about the tempco of the breakdown voltage vs a Zener, Dennis.? IIRC, a 5.1 V Zener has a tempco near zero.? ? ? ?Jim Ford?Sent from my Verizon, Samsung Galaxy smartphone

And Zeners of around 6V have a positive TC about equal in magnitude, but opposite in sign, to that of a forward-biased diode. Stack the two to create a low-TC reference. Useful for those times when

My boss taught me a trick back in the early 1970s when Zener diodes were expensive and some transistors were almost as cheap as "pop-corn". The reverse biased base-emitter junction has a very sharp

The B-E diode certainly recovers very fast (my samples typically measure about twice the value Pease reports, but that’s still fast). The junction capacitance is large (several pF) though, so that

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.