The V-Fetron Comes To Life - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 2nd March 2016, 01:09 AM   #1
diyAudio Member
 
Join Date: Feb 2002
Location: Canada
Default The V-Fetron Comes To Life

I'm intrigued by Michael's latest design. My first thought when I saw the schematic was if it would be as easy to make it a balanced input as it was with the IronAmp.

Click the image to open in full size.

Regards,
Dan
  Reply With Quote
Old 2nd March 2016, 11:19 PM   #2
WBS is offline WBS  United States
diyAudio Member
 
Join Date: Jan 2007
Location: Napa Valley
Default Eureka!

This looks like an interesting use of a couple of the 2sj28 that I bought last fall. I bought 6 after the pairs sold out and just ordered 4 more since the sj28s are almost all gone!

I just need someone to fill in the values to the simplified schematic 'cause I ain't no math whiz.
__________________
"Why do we try to fool the ear? Because it makes people happy and it makes it easier to listen to stuff."
Nelson Pass, BAF 2012
  Reply With Quote
Old 2nd March 2016, 11:25 PM   #3
diyAudio Member
 
Join Date: Oct 2004
  Reply With Quote
Old 3rd March 2016, 01:26 AM   #4
wdecho is offline wdecho  United States
diyAudio Member
 
Join Date: Oct 2014
Quote:
Originally Posted by WBS View Post
This looks like an interesting use of a couple of the 2sj28 that I bought last fall. I bought 6 after the pairs sold out and just ordered 4 more since the sj28s are almost all gone!

I just need someone to fill in the values to the simplified schematic 'cause I ain't no math whiz.

Nelson has promised one of his circuits using this transistors. I picked up some too with anticipation of his one day finding time to design an amp using these transistors. If you reverse the voltages you can use it in one of Michael's designs using transformers.
  Reply With Quote
Old 3rd March 2016, 01:59 AM   #5
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Thread cleaned up. I recommend everyone play nicely going forward.
__________________
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
  Reply With Quote
Old 3rd March 2016, 02:37 AM   #6
diyAudio Member
 
Join Date: Feb 2002
Location: Canada
Quote:
Originally Posted by WBS View Post
This looks like an interesting use of a couple of the 2sj28 that I bought last fall. I bought 6 after the pairs sold out and just ordered 4 more since the sj28s are almost all gone!

I just need someone to fill in the values to the simplified schematic 'cause I ain't no math whiz.
No worries, I'm sure we'll have a more detailed schematic once all the testing is done. BTW I built the IronAmp that Michael designed and it was so good it just worsened my addiction to amp building.

Regards,
Dan
  Reply With Quote
Old 3rd March 2016, 03:42 AM   #7
diyAudio Member
 
Join Date: Dec 2004
Location: Durham, NC
Just ordered a quad of 2sj28s from famous place down in Singapore. I dig this circlotron design.
  Reply With Quote
Old 5th March 2016, 04:18 AM   #8
diyAudio Member
 
Join Date: Sep 2010
Location: Perth, Western Australia
@hifibluedevil Mind if I ask where on Singapore? I'm considering getting a few myself with a view to this build.
  Reply With Quote
Old 5th March 2016, 09:36 AM   #9
diyAudio Member
 
Join Date: Dec 2004
Location: Durham, NC
Quote:
Originally Posted by aspringv View Post
@hifibluedevil Mind if I ask where on Singapore? I'm considering getting a few myself with a view to this build.
here:
2SJ28 P Channel VFET From Sony
  Reply With Quote
Old 6th March 2016, 02:42 AM   #10
diyAudio Member
 
Join Date: Sep 2010
Location: Perth, Western Australia
Thanks! I may as well grab a few...

Cheers!
  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
Tube life.. M Gregg Tubes / Valves 1 2nd May 2015 03:12 AM
How about an IXCP10M90 as a FETRON Shoog Tubes / Valves 21 30th October 2013 10:16 AM
for the life of me CarlyBoy Tubes / Valves 5 30th January 2008 10:06 AM
The DIY Life DJ Exprice Everything Else 11 25th December 2006 07:38 PM


New To Site? Need Help?

All times are GMT. The time now is 06:53 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki