What can I use instead of k170/j74? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th May 2012, 01:03 PM   #11
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally Posted by Melon Head View Post
.........I have a tonne of 2sk170/2sj74..........
@ 0.21g each that comes to ~2.38million of each.

Are you selling them by the hundred, or by the thousand?
How much for random selection of both types?
__________________
regards Andrew T.
  Reply With Quote
Old 28th May 2012, 01:07 PM   #12
Banned
 
Join Date: Nov 2006
I didn't mean literaly. LOL
I wish I did though
I think I have 100 of each laying around
  Reply With Quote
Old 28th May 2012, 01:24 PM   #13
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
We could compare your ton size with mine, or Paps'.
__________________
No More Mr Nice Guy
  Reply With Quote
Old 28th May 2012, 01:47 PM   #14
Banned
 
Join Date: Nov 2006
What is Nelson going to do when he runs out?
  Reply With Quote
Old 28th May 2012, 02:01 PM   #15
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
not likely soon

after that , in 30 yrs or so ........... who cares ?

in any case - Pa already have own output Jfet ......... why not input ones , too

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 28th May 2012, 02:28 PM   #16
Banned
 
Join Date: Nov 2006
Yes I know, but I don't know how easily semisouth can make p channel jfets equivalent to the quality of their N channel Jfets
  Reply With Quote
Old 28th May 2012, 02:57 PM   #17
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
you are talking about Semisouth biguns , or LT small ones ?
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 28th May 2012, 03:02 PM   #18
Banned
 
Join Date: Nov 2006
Both I suppose.
Since Toshiba no longer make either small signal jfet or power mosfet then I suppose Nelson will want to use Semisouth.
I noticed Nelson is now using Toshiba power mosfets on his latest amps.
  Reply With Quote
Old 28th May 2012, 03:16 PM   #19
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally Posted by Melon Head View Post
.....
I noticed Nelson is now using Toshiba power mosfets on his latest amps.
which ones ?

Xs-es ?

I'm not so sure , if you mean on Toshibas in output stage

as I understand it , Toshiba Jfets and Toshiba mosfets are situated in FE
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 28th May 2012, 03:21 PM   #20
Banned
 
Join Date: Nov 2006
Xs-es
Nelson now uses Toshiba.
Not sure what assumptions to make.
Initial assumption is that they are used on output. I am quite sure Nelson is using source follower on output. So I suppose it could also mean FE if he just means voltage gain.

"We continued to use cascoded NOS (New Old Stock) Toshiba Jfets that still set the standard for input devices, but for the heavy voltage lifting we switched to better Toshiba Mosfets (NOS, also discontinued)."

Last edited by Melon Head; 28th May 2012 at 03:40 PM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Where can get K170/J74V? KevinWang Parts 12 19th May 2012 01:13 PM
F5 J74 and K170 bassnkeys Pass Labs 11 23rd April 2011 08:19 PM
WTB sk170v j74 matched merlin el mago Swap Meet 0 26th October 2010 09:51 AM
Teflon PCB, 2sk170 and j74 maxpou Solid State 10 25th April 2008 06:03 PM


New To Site? Need Help?

All times are GMT. The time now is 01:51 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2