Electronics > Beginners

are there counterfeit power rf transistors

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LaserTazerPhaser:
There are many counterfeit parts especially commonly used parts. Has anybody seen or obtained counterfeit power RF transistors? Those are typically adhered to large ceramics or stud mounted.

https://www.aliexpress.com/item/MRF9060-electronic-components-transistor/1961064451.html

https://www.aliexpress.com/item/MRF282Z-TRANSISTOR/32760229754.html

bd139:
Yeah don't buy anything like that off aliexpress. There's lots of crap out there. Worth hitting a respectable supplier for that sort of stuff:

https://www.rfparts.com/

https://www.rf-microwave.com/en/home/

Kleinstein:
You can get fake 0 ohms resistors and about anything fake that is more expensive.

OwO:
In my experience very rare. For experimentation I would go for refurbished transistors salvaged from base stations. The price of $5 is about right for a refurbished part. I don't ever buy RF power transistors from a distributor because the prices are way too high for an experiment.

bd139:
I'm not so sure about the refurbs either. I had a couple of Florida microwave attenuators off aliexpress and the tabs were cut short to the case making them useless and the case was badly chipped. Looked like they'd got them out with a hammer.

@Kleinstein: I've actually seen that a few years back. Before I decided to get some decent resistors I got a pack off ebay from China. The leads were like hairs and the 0 ohm resistor (single black band) was 10 ohms! Sure someone just said "eehhh, close enough!"

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