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G6Tanuki · 8th Apr 2019, 4:55 pm

It's not only popular audio transistors that are victims of fakery; the problem extends into RF power-transistors too: several 1980s Motorola "MRF"- and International Rectifier "IRF" devices as used in CB sets, ham transceivers etc are now more often fakes than not, likewise the 'integrated power-amp' blocks produced by Mitsubishi and used in old VHF/UHF commercial two-way gear.

There's no easy answer to this: paying a lot and buying from reputable mainstream dealers is no guarantee that fraud hasn't taken place somewhere in the supply-chain. At least the likes of CPC, RS etc. are going to be easier to get a refund from if the deal does turn out to be a bad one.

8th Apr 2019, 4:55 pm	#23
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,005	Re: Chinese power transistors It's not only popular audio transistors that are victims of fakery; the problem extends into RF power-transistors too: several 1980s Motorola "MRF"- and International Rectifier "IRF" devices as used in CB sets, ham transceivers etc are now more often fakes than not, likewise the 'integrated power-amp' blocks produced by Mitsubishi and used in old VHF/UHF commercial two-way gear. There's no easy answer to this: paying a lot and buying from reputable mainstream dealers is no guarantee that fraud hasn't taken place somewhere in the supply-chain. At least the likes of CPC, RS etc. are going to be easier to get a refund from if the deal does turn out to be a bad one.