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Old 30th July 2011, 08:30 PM   #1
dgta is offline dgta  United States
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Default 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?
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Old 8th August 2011, 09:22 PM   #2
cliffyk is offline cliffyk  United States
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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...
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Old 9th August 2011, 12:32 AM   #3
dgta is offline dgta  United States
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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?
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Old 9th August 2011, 03:54 AM   #4
cliffyk is offline cliffyk  United States
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Quote:
Originally Posted by dgta View Post
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.
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Old 9th August 2011, 07:08 AM   #5
dgta is offline dgta  United States
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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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