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Old 23rd October 2012, 11:47 PM   #11
tinitus is offline tinitus  Europe
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Originally Posted by MASantos View Post
I don't have any means for testing them so thoroughly so I couldn't provide any assurance that they are genuine. Maybe this is much more troublesome than I thought...
that is probably the biggest problem
not good to pass them on to other people who cant test them either
imagine what happens if many people begin to build amps with fake jfets, and ....
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Old 24th October 2012, 02:16 AM   #12
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Location: New York State USA
I'm afraid that a lot of people have already bought these devices from ebay sources, and maybe distributors. For all I know these are actually Toshiba, but perhaps defective dies or other part numbers renumbered. They do look a bit like 2SJ103's curves in the Toshiba book.

But for amps the K170s ought to work just fine, if they have curves like the ones I bought.

The question is for low noise applications or situations where the noise floor starts to effect the minimum distortion spec (ultra low distortion circuits for example).

I am not an expert on the way that devices are packaged or the ins and outs of the business end of this. Just reporting what I have found thus far.

http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- every once in a while I say something that makes sense... ]
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