Electronics > Beginners
are there counterfeit power rf transistors
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mc172:
Yes. Try to find a genuine 2SC1971!
OwO:
I have bought 2sc1971s from street vendors and even then all performed up to spec and I never found a defective one. Nowadays I don't use antiquated parts anymore so it's even less of an issue.
CJay:
I'd be genuinely happy to find a source of 2SC1971 that work to spec and are cheap, how long ago did you find them and do you remember how much you paid for those OwO?

 
OwO:
It was back in 2014/2015 and the price was 7rmb ($1.2) each. I just checked aliexpress and the most popular listing is $0.2 and has multiple reports of being fake, so I would be careful for this part number. Always read the negative reviews (1 and 2 star), a high average rating means nothing if there are lots of 1 star reviews. The taobao listings are around 10rmb now ($1.7) and probably have better chances of working, but there are also "refurbished" listings at around 2rmb.
bd139:
I'm convinced there's no such thing as a cheap and good 2SC1971 now.

There are plenty of 2SC1969 left if you want HF only.
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