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Old 13th February 2012, 05:10 PM   #441
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I've got 6 x GENUINE Motorolla 2N3773s on E-Bay if anyone would like them.
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Old 13th February 2012, 05:25 PM   #442
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Quote:
Originally Posted by AndrewT View Post
Zin,
the legs may be a packaging option.
The printing on the face is completely different from my 2sk170 batches.

AndrewT can you please post a high quality Macro photo of your genuine devices. I will do the same with the ones that I think are genuine.
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Old 13th February 2012, 05:29 PM   #443
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This one measures as a genuine 2SK170BL and it doesn't have cowboy legs.
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Old 13th February 2012, 05:30 PM   #444
AndrewT is offline AndrewT  Scotland
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I'll see what I can do.
But the sun has gone down.
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Old 15th February 2012, 02:06 PM   #445
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The pirates and thieves are out there to get us poor mortals.

Can we not help ourselves by trying to design using CURRENT and COMMONLY AVAILABLE parts.

All PIRATING is driven by a shortage of supply or the COST of RARE components.

Surely semiconductor manufacturers are trying to improve their products.

There MUST be a commonly available alternative to most devices - ICs maybe not, but discretes I would say there must be.

The 2SK170BL and the 2SJ109 have become almost unobtainable. We are inviting the counterfeiters to see us off by still ordering them.

The last few threads on counterfeit devices have been so obvious its comical. Unfortunately you wont know until you receive them. These devices have been so clearly sanded (abraded) of their original part number that a 6 year old could spot them.

That is not a slur against us, we are only buying them. If we dont buy them, the counterfeiters will go out of business.
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Old 15th February 2012, 04:38 PM   #446
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And after a short while, They will start producing whatever we are using instead
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Old 15th February 2012, 04:40 PM   #447
pdul is offline pdul  Denmark
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The nature of bussiness. Fake or real
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Old 16th February 2012, 06:31 AM   #448
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Quote:
Can we not help ourselves by trying to design using CURRENT and COMMONLY AVAILABLE parts.

All PIRATING is driven by a shortage of supply or the COST of RARE components.

Surely semiconductor manufacturers are trying to improve their products.

There MUST be a commonly available alternative to most devices - ICs maybe not, but discretes I would say there must be.
the problem with using modern devices, is that existing circuits may need to be tweaked to use the modern components. if i use more modern output transistors in place of obsolete ones, it's likely i need to recalculate the original compensation caps to keep the amp stable when using transistors that have a different Miller capacitance. it's not a difficult change, but it's one few are aware of, and the difference in Miller capacitance can make an amp oscillate.

however, we should be paying attention to companies like Fairchild and ON that are licensees of obsolete processes, tooling, and part numbers, as discontinued transistors are often added to these two company's repertiore. also, using reputable distributors, rather than buying from "E-Slay", or from what we used to call "phone booth" brokers, would alleviate a lot of the trouble. and as the old saying goes, "if you think it's too good to be true, it probably isn't".... stop jumping at the chance to get 2SC5200/A1943 devices for $2.00 each.
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Last edited by unclejed613; 16th February 2012 at 06:37 AM.
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Old 16th February 2012, 09:48 AM   #449
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Quote:
Originally Posted by pdul View Post
And after a short while, They will start producing whatever we are using instead
I'ld say:
They will keep on labeling whatever we are raving about instead.

In fact, I once heard that because there are often such wide dispersions in production, the rejects are labelled in a category that fits the remaining specs.
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Old 16th February 2012, 06:02 PM   #450
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Back to my 2SK170BL fakes. I bought them for the going rate from Dalbani.com, a reputed distributor.

No-one is safe.
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