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aldovan 15th August 2007 03:20 AM

Fakes Toshiba 2N3773 photos ?
Anyone have photos of fakes Toshiba 2N3773 ?
I get some and for me this is genuine.
True photos is fine, too.



djk 15th August 2007 08:49 AM

ESP took their photos down.

If it says 'Toshiba' and 2N3773 it's probably a fake.

I got some of these fakes a few years ago and the amplifiers I put tem in wouldn't run more than an hour or two before failing again.

I only buy ON Semiconductor from an authorized distributor and only in the original 100 lot packaging. Cheaper in the long run.

destroyer X 15th August 2007 10:09 AM

The ones painted red over the case, you can remove paint using your nails
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Those are fake...clearly fake.... ink quality is bad...they have no weigth...alike empty cases.

Those ones, are so clearly fakes that i can imagine that they could paint "FAKE" into the obvious they are.

They also are invitation to the ones want "to have advantage" to be fooled.... some of them deserve that, because they try to buy things by 1/4 of the price, they deserve another fox to eat the fox.

2N3773 are "heavy duty" transistors..can hold 30 amperes or more...also a good maximum voltage...they are heavy into construction too.... the case is not ligth aluminium...just holding it you feel if they are fake or not.

Observe the image... one of our brasilian kits..costing 25 dollares... can those transistors not be fake, when the total price is low this way?



destroyer X 15th August 2007 10:29 AM

You can see those ones into the E Bay.
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Even selling in big quantities.... one dollar for each one is really a very low price.

Do you trust they are real?.... or fake?



Burnedfingers 15th August 2007 10:43 AM

Did Toshiba ever make a 2N3773?

I don't think so..

djk 15th August 2007 11:32 AM

That's the point, I don't think Toshiba ever made parts with the JEDEC numbering system.

Another point:

Remember those Solitron 2N3773s I gave you?

They're hometaxial, fine for linear power supplies, but stone slow for amplifiers. The current shoot-through when the amplifier clipped was really bad.

We need epitaxial 2N3773s for amplifiers (4Mhz).


The one on the right is an obvious fake, wrong date code for a Motorola part, and the markings are rotated by 90*, who knows about the other one?

Since it is a quasi-comp amp, they could get genuine ON Semiconductor MJ15015 (180W SOA at 60V) for only $1.13 each.

If you wanted to go all out, the MJ21195/96 are only $1.86 each.

destroyer X 15th August 2007 03:02 PM

I miss those old folks a lot!... they were very good guys.
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Gold_xyz 15th August 2007 03:41 PM

Hi :D

My only 2N3773 Toshiba...
To check if it is a fake I should open it :magnify:

aldovan 15th August 2007 03:52 PM

This is fake , too !!!
Mine is the same of photo.
I open and the chip is very small.

jaycee 15th August 2007 03:58 PM

It is a fake... Toshiba have confirmed that they have never manufactured ANY "2N" devices, and not the 2N3773.

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