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Old 24th April 2015, 11:11 AM   #1
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Join Date: Mar 2004
Location: Texas
Default Plug for the diyAudio store LSK170C

I just measure the Idss of 8 of the LSK170C from the store and was astounded at the results!

1 @ 10.13

4 @ 10.16

2 @ 10.17

1 @ 10.31

Thanks to all involved!

Wow! 6 of the 8 LSJ74C measured 12.00!
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Last edited by johngalt47; 24th April 2015 at 11:31 AM.
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Old 9th May 2015, 02:59 PM   #2
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Join Date: Mar 2003
Location: midwest
Quote:
Originally Posted by johngalt47 View Post
I just measure the Idss of 8 of the LSK170C from the store and was astounded at the results!

1 @ 10.13

4 @ 10.16

2 @ 10.17

1 @ 10.31

Thanks to all involved!

Wow! 6 of the 8 LSJ74C measured 12.00!
Very tight, but, (and maybe I misunderstand) for most of the Pass amps like F-5 and so forth that use the 170 and J74 pair, dont the both of them need to be as similar as possible to each other in their Idss? If so, how does one get around that? Order 170 parts until you hit a match for your complimentary J fet? Or is this not a requirement and the pots make up for it?

I noticed Spencer no longer has "matched" 170 and J74 pairs... I still have several matched sets of Toshibas I bought when they were available but they wont last forever. If my concerns are not valid, let me know so I wont worry about this!

Thanks,

Russellc
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Old 9th May 2015, 09:01 PM   #3
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Join Date: Mar 2004
Location: Texas
yes, it is difficult finding matches as you say. I am still trying though.
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