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I thought this deserved it's own thread.

A quick report on the Multi-function Tester (TC-V2.12k)

https://www.circuitspecialists.com/content/430516/csi-tc1.pdf

They is very functional, it quickly allows one to ID bipolar/fet NPN/PNP N-channel/P-channel.

The Hfe function is pretty good, the Idss less so because the bias current is too low.

It showed all of my test samples of ~1980 Ti 2N3819 as being closely matched where as the

JFET-matcher-rullywow.com-Build-Doc-v1.01.pdf is much more picky and probably more relevant because of the higher bias.

Having said this, the TC-V2 is a very useful test device, well worth the cost.

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I hate replying to myself but I wanted to apologize for the mixed font size. I wrote it in MS word in dyslexie font all in size 14. Sorry it's difficult to read.

I got this one;

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No case but uses a real Atmel Chip. I use it all the time. When salvaging parts from old equipment

no need to identify just plug it in and it will tell you what it is!?

The Multi-function Tester (TC-V2.12k) is good for identifying parts, testing to see if they are good, but the transistor and JFET matching function uses too little gate current for most useful matching. Don't get me wrong, it is great unit and will find a lot of use on my bench, but, to really match JFETS or bipolars requires a dedicated test setup as I referred to in the other thread.

Rod Elliot has some good bipolar matching articles

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This page has a slightly different way of matching FETs

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I started "/g/loopantennas/topic/jfet_matcher_using_an_opamp/107470037" and this thread because I suspect anyone trying to build a clone of the newest Wellbrook loop would do well to match the JFETs. The Wellbrook loop is just a bit out of my comfort zone, I hate winding and trying to phase small transformers, I always turn an amplifier into a not so nice oscillator.

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A lifetime ago I cloned the MXR-90 for a friend and learned "ya really got to match those fets!" the hard way...

Note: Phasing is not the same as flanging. Solid state flanging requires analog delay lines or going full A to D and doing it all in DSP. While I play acoustic guitar, most of my musician friends at least own an electric guitar and are interested in various effects and I often get draggoned in to help.

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