Counterfit

[sdman]

Has anyone out there had problems with counterfit transistors?
If you have let us know, I think I got some from a supplier, need to make sure before I mention the vendor.

[PH104]

Sam

I haven't run into any conterfeit transistors myself (at least none that I know of!) but a good link if you haven't already seen it is:

http://sound.westhost.com/madashell.htm#counterfeit

What are the transistor types you suspect?

Hope they're OK.

Phil

[djdan]

2SC3281/2SA1302 Blow up (no load) just to +/- 50v ,
MJ15003/15004 same problems , TIP35/36 ,

[djdan]

2SC3281/2SA1302 Blow up (no load) just to +/- 50v ,
MJ15003/15004 same problems , TIP35/36 ,

[Damon Hill]

You've probably got a problem with your amplifier, rather than
counterfeit devices. Still, it's best to buy from sources you
can trust, preferably authorized dealers. Substandard parts
often can't meet the published SOA, or even voltage ratings
and in the case of 'sustained beta' devices like the 2SA1302/
2SC3281, probably fall down in that area too.

[djdan]

I don't have any trouble with my amps becouse I used this more than 10 years. We call this "devices" - " made on the boat " somewere in China or Singapore . In Romania we have 2 prices for example:
2SC3281-TOS ....... 3.2$ ( Toshiba I think )
2SC3281-DIV ....... 0.8$ ( Some no name for beginners).

Last month I see this cheap counterfit devices in Munich (Germany).
If it anybody do not belive me I can send it 4 - 6 counterfit power tranzisor , or everybody can buy this from
www.vitacom.ro or www.adelaida.ro.

Best regards ,
Djdan

[alaskanaudio]

There have been reports of bad parts being circulated and sold to reputable electronic parts outlets. In some cases even the names and part numbers have been made to look like they came from major manufacturers.

If bad parts were purchased from a supplier then that supplier would surely like to know this so they can check their inventory and remove the bad parts from circulation. I would also suspect that they would refund the full purchase price. It is doubtful that a supplier would sell bad parts on purpose. It is of course possible, but I like to look at the good side of things.


John Fassotte
Alaskan Audio

[grataku]

sdman
what's the problem? Just say who it is. The last thing we need is one more ******* vendor trying to screw us with fake parts.
Believe me, they know exactly what they have in stock and what they are trying to sell you.
MCM was selling fake sanken 2sa1216 and 2sc2922 for a hefty $8 and change a piece and probably still is. The specimen I recieved, and returned, was absolute crap.
MCM is particularly cunning in that it posts the brand names and a little note which says something to the extent that the component may be the original or a substitute with equivalent characteristics.

[djk]

www.dalbani.com
www.dalbani.co.uk
These guys sell counterfeit parts.In the past 2SD555, MJ15022, and 'Toshiba' 2N3773. I will never buy ANYTHING from them again.

[bawang]

As I've mentioned in the Introductions thread, this is a common thing in Malaysia. I've been duped, 2SA1302/C3281, MJ15003/4, TIP35C, TIP127 etc. I have a couple of bags full of them, and I'm not bluffing! Talks with a local supplier showed that even they are being duped! It seems that the culprits are the main suppliers, who are mostly dealing with international trade. From my own investigations, it seems that these fake stuff is mostly made in China or India. Circulation is widespread.

The earlier fakes are easy to identify by their lousy appearences. But latter fake devices are impossible to identify, until they blew up.

My suggestion: make the act of making fake stuff a Capital Offence!!!!!!! I'm extremely pissed off!!!