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Old 10th April 2009, 09:25 PM   #1
polygon is offline polygon  Indonesia
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Default sk30 for B1

hi, i've been planning to build the b1 buffer, but it is kind of hard to get sk170 here, meanwhile i have some sk30's in hand, can i use them directly? thanks
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Old 10th April 2009, 10:07 PM   #2
Zen Mod is offline Zen Mod  Serbia
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they're pretty eeny weeny ( read - looow xconductance ) comparing to 2SK170 ;

better make "my" Poor Man B1 variant - with J309 or J310 ( search in B1 thread ) ;

these Jfets are easy to find ( made even in ROHS , today ) , and dirt cheap ;

you can look at them as on 2SK170V , even at steroids ....
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Old 11th April 2009, 03:47 AM   #3
sukyone is offline sukyone  Thailand
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I used 2sk117
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Old 11th April 2009, 04:07 AM   #4
Salas is offline Salas  Greece
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This one can work too. Its not high gm, but it can give decent service. 2N5459 JFET is very cheap and easy to get.
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Old 12th April 2009, 05:14 PM   #5
polygon is offline polygon  Indonesia
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thanks guys, i'll look for all those alternatives mentioned
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