Yes, I would stick with Toshiba parts myself. I have enough of them.
It is my prejudice.
But I happen to work for semiconductor equipment manufacturers, and we have all major players as customers.
I know what resources Toshiba has with their manufacturing process research and quality control.
And this is not a small player like Linear Systems can ever afford.
BUT, it is a prejudice. I have no scientific proof.
Patrick
It is my prejudice.
But I happen to work for semiconductor equipment manufacturers, and we have all major players as customers.
I know what resources Toshiba has with their manufacturing process research and quality control.
And this is not a small player like Linear Systems can ever afford.
BUT, it is a prejudice. I have no scientific proof.
Patrick
If they use a modern foundry it could well have more resources. For every reasonably informed person, as I know you are, there are several that will treat this like hand rolled silver and beeswax capacitors vs good commercial film caps.
If I had the Toshiba parts I would probably prefer them myself. But nowadays you take a chance buying any 74 jfets and will most likely get fakes. It is getting that way also with 170's. I have a supply of the Toshiba's that I am almost positive are original and some I am not so sure of I bought before the lsk's became available. Now that the lsk's are available I would not gamble on getting original Toshiba from any source. If this was not the case we would have to take a chance buying from questionable sources and testing them before installing to be sure and probably get fakes most of the time. We do not have a reliable source such as Mouser or Digikey anymore for Toshiba jfets. We do for LSK's.
for me , it's simple ;
whenever I need them , Pa is sending me few small batches of 500pcs of each polarity.
though , he's lazy these days - I need to match them by myself
whenever I need them , Pa is sending me few small batches of 500pcs of each polarity.
though , he's lazy these days - I need to match them by myself
for me , it's simple ;
whenever I need them , Pa is sending me few small batches of 500pcs of each polarity.
though , he's lazy these days - I need to match them by myself
Why do you get so much enjoyment out of teasing us.
Bloody bastard.
Hahahaha
if ya don't believe me , ask him .
(explanation is simple - he'll do absolutely everything , just to avoid adopting me)
(explanation is simple - he'll do absolutely everything , just to avoid adopting me)
if ya don't believe me , ask him .
I believe you, that's why you are bloody bastard.
Hahahaha
I don't build anything for others or for sale so I simply have old projects to recycle parts from if need be, even a stash of the top-hat matched pairs from the 80's. IMHO creating a cult around obsolete, high priced, and frequently faked NOS parts does no good for the DIY hobby.
I did find a seller on E-Bay selling NOS 2SK170BLs. They were genuine. I've got 4 of them left if anyone wants them. Make a decent offer I paid $12.00 each for them.
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I bought a batch of 100 2sk170 from zoufangh not long ago. He used to sell here, but has gone to eBay sometime ago. They are genuine.
Best way is experiments on breadboard.
You can try Mr Pass buffer schematics for example is simple and you can change resistors types and brands :
metal film, carbons film, wirewound and fancy etc. and find subtle differances and perfect sound to your taste.
Greetings 🙂
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