Obviously if a transistor has a leaky or shorted junction, or it doesn't pass the proper amount of emitter current when forward biased, it's junk and there's no point in AC testing. If you are fixing something on the bench, DC testing is usually sufficient.
Dynamic characteristics are different because of the presence of AC and DC together, while static characteristics are based on DC alone. In many circuits, DC is used to set up the quiescent bias conditions on the device, while AC represents the signal we're interested in. Like tubes, transistors have both static (DC) and dynamic (AC) characteristics. Transistors can also be checked in-circuit with a multimeter, but I did not find the results reliable or predictable. I like the BK and newer DCA because it tests the leads/type in all configurations so I do not need to look up each individual transistor. might be ok, but haven't used them so can not comment on how the compare to the BK. 2a29301de8 Some of the older Sencore models like the TF 17A, TF 166 etc. Simple go/no go BK 510 new are listed for $55. The BK in-circuit tests work well, and have saved me from pulling transistors from my boards. So if you have time and look around then it may be worth waiting a while and checking periodically.Īs mentioned, a good alternative to the 530 is the BK 520B/C or 510/A which I have seen working ones go for $25. Some of the other listed used transistor testers are going for ridiculous prices and are nothing special. The last two Bk 530 on ePay sold for under $50 and $25 (working but dirty), the ones currently listed have been there for months (I bought mine 4 months ago and also saw these).
TRANSISTOR TESTER DIAGRAM PRO
If I new the pro was coming out in a few months, I probably would have opted for that because in a few applications I need to match semiconductors. Brand new works great, but does not do curve tracing. I have the previous model which is the DCA55, only out of circuit works with multiple semiconductors, pretty foolproof. A modern day out of circuit tester that is "relatively" inexpensive and will allow curve tracing and matching of devices is the Peak Atlas DCA75 Pro. There are subsequent models to the 530, but they are uncommon and much more expensive. There are other simpler ways to test in/out-circuit, but I have better results/information with the 530. Works great and I like the in circuit and out circuit capabilities. If you are looking for old school that can do both, I like (have) a BK Precision 530 Semiconductor tester that I picked up for $40 (so be careful of not paying too much).
Depends on what devices you are testing and if you want in-circuit capabilities or just out of circuit.
0 kommentar(er)
