[sdiy] THAT 2155 on sale

[David G Dixon]

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).



-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
Frédéric (Opensource)
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!

Frédéric

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?
>
> Lay's!
>
>
> 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 
> giveaway)
> 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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