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-   -   2SK170BL (http://www.diyaudio.com/forums/pass-labs/207256-2sk170bl.html)

KatieandDad 21st February 2012 04:25 PM

2SK170BL
 
How many 2SK170BLs does it take to get four (well 2 x 2 really) matched for Idss ????

So far I've got 21 plus 16 fakes.

6.51
6.70
6.71
7.09
7.43
7.49
7.96
8.01
8.38
8.42
8.61
8.66
8.96
8.97
9.04
9.16
9.41
9.53
9.57
9.78
10.70


At the initial Idss measuring stage NONE of them match for Idss ?????

I've got another 16 coming to replace the fakes.

merlin el mago 21st February 2012 04:28 PM

People buy one batch of 100.

flg 21st February 2012 04:30 PM

How many did you buy where?

AudioSan 21st February 2012 04:31 PM

or just buy them matced:)

merlin el mago 21st February 2012 04:38 PM

Quote:

Originally Posted by flg (Post 2916407)
How many did you uy where?

Quote:

Originally Posted by AudioSan (Post 2916408)
or just buy them matced:)

Matched or a batch of 100, I bought to spencer (swap meet) http://www.diyaudio.com/forums/swap-...0bl-sales.html

KatieandDad 21st February 2012 04:39 PM

Quote:

Originally Posted by flg (Post 2916407)
How many did you uy where?

They're not easy to get. I bought 20 from Dalbani (including the 16 fakes) and another 16 from an E-Bay source in China.The Chinese source was sound and the components appear genuine.

gl 21st February 2012 04:40 PM

It depends on your definition of 'matched'. For me I would consider the 6.7/6.71 and 8.96/8.97 pairs as being matched for any project I've seen on this site. I would be happy to use several other pairs that are within .05V as well.

Full disclosure: I have matched 100+ of the 2SK170's and of the 2SJ74's and have built a number of projects with them. I typically am happy with the results when I use parts matched to within .1 volts.

Graeme

flg 21st February 2012 04:48 PM

What he said! They don't have to be exact, just as close as possible.

merlin el mago 21st February 2012 04:50 PM

Quote:

Originally Posted by gl (Post 2916422)
It depends on your definition of 'matched'. For me I would consider the 6.7/6.71 and 8.96/8.97 pairs as being matched for any project I've seen on this site. I would be happy to use several other pairs that are within .05V as well.

Full disclosure: I have matched 100+ of the 2SK170's and of the 2SJ74's and have built a number of projects with them. I typically am happy with the results when I use parts matched to within .1 volts.

Graeme

Idss mA not volts

KatieandDad 21st February 2012 04:51 PM

Quote:

Originally Posted by gl (Post 2916422)
It depends on your definition of 'matched'. For me I would consider the 6.7/6.71 and 8.96/8.97 pairs as being matched for any project I've seen on this site. I would be happy to use several other pairs that are within .05V as well.

Full disclosure: I have matched 100+ of the 2SK170's and of the 2SJ74's and have built a number of projects with them. I typically am happy with the results when I use parts matched to within .1 volts.

Graeme


There was a quote on the B1 builders thread that stated that the match had to be far closer. Hopefully a few guys will comment about how closely they need to be matched.


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