ATMega based LCRs

GroupDIY Audio Forum

Help Support GroupDIY Audio Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Hi Ungifted I just checked my MK-328 tester and it already came with the firmware V1.12K

Do you know if this meter takes into account (subtracts) Leakage from the HFE measurement when measuring HFE of germanium transistors?



 
Can anyone recommend a good one of these that will test JFETs? The one I have just identifies them as a pair of diodes and gives the forward voltage drop.

Cheers

Ian
 
Whoops Yes, it takes into account leakage when measuring germanium transistors, please check 1.12k datasheet
https://github.com/svn2github/transistortester/tree/master/Doku/tags/english/ttester_eng112k.pdf
ruffrecords
At least MK328 must measure JFETS, not so in detail as DCA75 but it it must identify them correctly. I saw jfets as a diode junction with fake J201s or SK170s when their gain is too low or possibly other reasons. BTW even mk328 with 1.12k doesn't show Vgs (off) though it must (see docs). Only Vg (on) shown.
Please note that every transistor tester from China with 1.12k must identify jfets. But stock firmware of T3-T4 as instance identify them as BJT.
 
I just tried the one pictured here:

http://www.instructables.com/id/AVR-Transistor-Tester/

and it was a total fail for measuring JFETs. I manually measured Idss of a J201 at 390uA and the tester reported 220uA.

I tried to calibrate but it didn't make any difference.
 
Back
Top