[sdiy] Counterfeit chips

[Matthias.Herrmann at jeppesen.com]

"bayne d'artagnan" <djhohum at gmail.com> wrote on 11/15/2007 02:02:22 PM:
> So I assume that he's the guy selling them in large quantity for about
> $10 each? Interesting. Of course, even though they may work fine it
> doesn't mean that they're not "counterfeit."  Does anyone know if he
> claims that they're NOS or that they are newly manufactured?
> 
> I'm tempted to order some now just so I can compare them with some
> genuine NOS parts.

i got two SSM2044 VCF modules running, identical circuits, one with NOS 
from the states and one with HKSS. i did not take a look at the scope but 
just from listening i can't hear any difference in timbre or response.

cheers,
matthias
___
www.modular.fonik.de

> 
> This, of course, brings up other questions as well. What exactly
> should we "be careful of" with other counterfeit chips? Are there
> reports that these 3374s are unstable, or failing early?  Copyright
> issues aside, I can see real problems with low quality power parts but
> it seems to me that counterfeit synth parts might have desirable
> qualities of their own.
> 
> On 11/14/07, Matthias.Herrmann at jeppesen.com
> <Matthias.Herrmann at jeppesen.com> wrote:
> > synth-diy-bounces at dropmix.xs4all.nl wrote on 11/14/2007 07:50:59 PM:
> > > Hello,
> > >
> > > Not only CEMs ...
> > >
> > > The chineese mafia is still active on Ebay through Mr
> > Hongkongsuperseller , a
> > > big specialist who sale very bad quality parts ( switches , jacks,
> > knobs)  and
> > > fake chips like MN3007, CEMs SSM and many others ... Avoid this
> > > seller absolutly
> > > !!! How this guy can be a powerseller is a true mistery to me...
> >
> > two times i bought SSM2044 filter ICs from HKSS (30 pieces) and they 
all
> > were fine. (just for the record)
> >
> > cheers,
> > matthias
> >
> > ___
> > www.modular.fonik.de
> >
> > >
> > > Also take a lot of care when you purchase vintage chips from any
> > 'unofficial'
> > > sources, and specialy if they are at a very attractive cheap price 
...
> > >
> > > Cheers,
> > >
> > > Marc B.
> > >
> > >
> > >
> > > Selon Tom Wiltshire <tom at electricdruid.net>:
> > >
> > > > Hello All,
> > > >
> > > > I recently received the following warning from someone who I'd
> > > > contacted trying to get hold of old CEMs:
> > > >
> > > > > Please particularly be aware of a new batch of cem3374 
counterfeits
> > > > > that have just been coming out the last month.
> > > > > Also, IR3R01, IR3R05, SN76477N.
> > > > >
> > > > > The cem3374 all (so far) appear to be date '93 which should be a
> > > > > give away and have no part number.
> > > > > The IR3R01 and IR3R05 can be distinguished because they do not 
have
> > > > > a 'oval cut' shape to the face of the IC such as all of that 
series
> > > > > had.
> > > > > The SN76477N can be determined by a TI symbol embossed in the 
right
> > > > > corner but no standard date code.
> > > > >
> > > > > So please take care and anytime feel free to enquire on items. I
> > > > > spend a lot of time and have people here dedicated to finding 
out
> > > > > this information for this reason.
> > > >
> > > > I don't want to spread rumours, and obviously I have no other
> > > > confirmation of this, but I'm bringing it to your attention. You
> > > > choose how seriously you take it. It's wise to at least be aware.
> > > >
> > > > T.
> > > >
> > > >
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