Electronics > Beginners
How to choose a transistor-meter ?
myf:
Hello,
I got this tc1 device. It works as expected.
Results are fine for PNP and NPN Darlington transistors. Displayed gain for bc516 and bc517 transistors is about 30k or 40k.
It's very funny to play with 2-colors leds with 2 pin or 3 pin. Zener diodes are described as 2 diodes mounted head-to-tail.
Of course device doesn't detect lm317 and lm337 variable tension regulators, but lm7805 fixed tension regulator is described as 2 diodes.
I also test the Zener abilities for this device :
With tc1 and a ut61e I get for
Zener=5.6V - tc1=5.76V - ut61e=5.730V ut61e=3.527mA
Zener=13.0V - tc1=13.0V - ut61e=13.090V ut61e=2.775mA
Zener=27.0V - tc1=26.8V - ut61e=26.94V ut61e=1.375mA
tc1 can't measure 30V-Zener.
The ut61e has two peak-measures : peak-min and peak-max.
With the 5.6V-Zener, peak currents are about +/- 9% from 3.25mA to 3.78mA, and peak tensions are around 1%.
I test capacitors from 1nF to 4.7mF. I get the same measure for polarised capacitors in both ways, but measures for very large capacity varies : ut61e=5.78mF and tc1=6.09mF.
Battery allows about 30 or 50 tests. Phone-charger and its standard cables are fine.
Have a nice day !
F. from France.
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