sk30 for B1

polygon · 10th April 2009, 09:25 PM

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

Zen Mod · 10th April 2009, 10:07 PM

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 ....

sukyone · 11th April 2009, 03:47 AM

I used 2sk117

Salas · 11th April 2009, 04:07 AM

This one can work too. Its not high gm, but it can give decent service. 2N5459 JFET is very cheap and easy to get.

polygon · 12th April 2009, 05:14 PM

thanks guys, i'll look for all those alternatives mentioned

10th April 2009, 09:25 PM	#1
polygon diyAudio Member Join Date: Jun 2004 Location: bandung	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

10th April 2009, 10:07 PM	#2
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	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 .... __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

11th April 2009, 03:47 AM	#3
sukyone diyAudio Member Join Date: Jul 2006 Location: Bangkok	I used 2sk117 __________________ All DIY by me.http://sukyone.blogspot.com

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12th April 2009, 05:14 PM	#5
polygon diyAudio Member Join Date: Jun 2004 Location: bandung	thanks guys, i'll look for all those alternatives mentioned