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dgta 30th July 2011 09:30 PM

Vintage transistor testers
 
Many of the old transistor testers (Heathkit, Sencore, etc. etc.) have both bipolar and FET capabilities.

Are they capable of testing MOSFETs or just JFETs?

cliffyk 8th August 2011 10:22 PM

Most all that can test a JFET can test a MOSFET, however you may have to develop your own Good/Bad interpretation of the meter reading based on tests of known good devices.

Better yet would be to pick up one of the older curve tracers that use an oscilloscope's X-Y display, like the Leader LTC-905 and Heath IT-121/3121.

Another very affordable way to test almost any semi-conductor device is the Peak Electronics Atlas DCA55. It's not a full-blown hard-core test like a curve tracer, however it's a lot more than just a go/no-go tester--first thing I grab when presented with a suspect semi-conductor...

dgta 9th August 2011 01:32 AM

That's a very interesting little tester, Cliffy. I'll give it serious consideration. Not as full blown as even a regular vintage transistor tester like the Heath 3120, but hey, it's very small and does a lot.

It doesn't do transconductance for FETs, correct?

cliffyk 9th August 2011 04:54 AM

Quote:

Originally Posted by dgta (Post 2665390)
That's a very interesting little tester, Cliffy. I'll give it serious consideration. Not as full blown as even a regular vintage transistor tester like the Heath 3120, but hey, it's very small and does a lot.

It doesn't do transconductance for FETs, correct?

That is correct, nonetheless and as you indicated it is small and "does a lot" for $70 shipped it's hard to beat.

dgta 9th August 2011 08:08 AM

Thanks Cliffy for bring it to my attention. I wasn't aware that such a device exists. I will order one shortly.


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