[sdiy] THAT 2155 on sale
David G Dixon
dixon at mail.ubc.ca
Sun Apr 19 21:29:24 CEST 2020
I guess I've been lucky -- I've done tons and tons of DIY for 12 years, and
the only "fake" chips I ever bought were a bad batch of LF444 quad opamps.
I bought them from Digikey.
The next batch I bought (also from Digikey) were fine.
In my career as a designer, I have always tried to avoid using "special"
parts -- anything expensive, difficult to obtain, rare, old, etc -- at this
point, the hardest-to-obtain part I use in any design is the 2N5485 JFET,
and I can still get those from Small Bear (for $0.50 apiece).
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
Sent: Sunday, April 19, 2020 10:50 AM
To: sleepy_dog at gmx.de; synth-diy at synth-diy.org
Subject: Re: [sdiy] THAT 2155 on sale
Working on the miniBrute 2, I received two prototype
PCBs populated with fake LM3046 transistor arrays...
marking was strictly identical as TI ones.
... and also failing UC3843.
Just beware when sourcing your components!
Le 19/04/2020 à 19:33, sleepy_dog at gmx.de a écrit :
> Gordonjcp wrote:
>> You should only ever buy components from China.
>> The one and only time I've ever had "fake parts", they were
>> mislabelled 78L05s. The clue was that they came from America.
>> Who ever heard of an American chip manufacturer?
> Apart from the made-in-China-under-supervision stuff.
> They do like to sell fake MAX3232 via ebay and Amazon, which go into
> latch-up when sneezed over at the wrong angle.
> And they really like to sell fake power transistors at Chinese ebay.
> They misunderstood the meaning of the word "die" in terms of necessary
> ingredients, so that's what they do when trying to operate them at 1/10
> of the spec'd power to dissipate. (cutting them open reveals small
> signal BJT die - hence the unbelievably high hfe for those, dead
> And that's what I witnessed myself as some hobby electronics DIYer doing
> this on a couple weekends a year.
> I'm sure there is far more out there.
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