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 10th October 2011, 01:44 AM   #1
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Default BA-C

Waiting on parts again and waistin time thinkin and had a question. I was impressed with what Nelson has accomplished with BA-3 and thinking of other interesting circuits that perform well and are still simple. One that comes to mind is the Circlotron article by Rothacher. The distortion numbers are very good and get even better with a nice device like the SS fets. Question is, can something like this be used as a VAS instead of the usual standalone power amp or output stage. Bigger easier load than speaker. Numbers should only improve with smaller die parts. LU jfets have been used successfully in DAO follower. Even the 2013 would be a candidate. BF862, J310. If possible, could be very nice. Clean power would be important. I will scribble on paper while out of town. Probably should burn it as waste of time. Even if possible, i probably couldn't get it to work. Still figuring out biasing of Jfets
  Reply With Quote
Old 10th October 2011, 02:58 AM   #2
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
sketch please , so we all can laugh together .

I'm doing exactly the same , all the time .

__________________
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 ; Papatreasure
  Reply With Quote
Old 10th October 2011, 10:25 AM   #3
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Little light on the subject that makes things interesting.

Quote:
Originally Posted by Nelson Pass View Post
I mentioned it because it's an interesting example of how
things work - the output device is actually driven by the
voltage across the resistor with current provided by the
input JFET. This voltage has been bootstrapped by the
output, so now it depends on the gain of the output
device.

So you have to ask yourself - is this really a follower?

  Reply With Quote
Old 10th October 2011, 11:48 AM   #4
www.audiohobby.com
diyAudio Member
 
Join Date: May 2001
Blog Entries: 4
When you stare into an abyss, the abyss stares back at you.
__________________
I'm not hanging around the forum these days but if you need help: Visit My Website | My YouTube Channel | Email Me | Wheaton's Law |
  Reply With Quote
Old 10th October 2011, 12:26 PM   #5
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
It doea and it is deep. This circuit will screw with your head more than most. I will probably have to build it to have a chance of understanding it. That being said, i got a feeling this has real potential
  Reply With Quote
Old 10th October 2011, 12:45 PM   #6
www.audiohobby.com
diyAudio Member
 
Join Date: May 2001
Blog Entries: 4
That's the spirit, buzz. Show it you're not afraid.
__________________
I'm not hanging around the forum these days but if you need help: Visit My Website | My YouTube Channel | Email Me | Wheaton's Law |
  Reply With Quote
Old 10th October 2011, 12:50 PM   #7
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
What if i am
  Reply With Quote
Old 10th October 2011, 04:47 PM   #8
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Then pretend you're not.

  Reply With Quote
Old 10th October 2011, 04:54 PM   #9
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
Encouragement tune : The Platters (The Great Pretender - 1955 ).mpg - YouTube
__________________
BOXES for crying out loud
  Reply With Quote
Old 10th October 2011, 06:28 PM   #10
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Stare at a circlotron schematic and recite the question,

Why is there something rather than nothing?

  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
Burning Amplifier BA-2 Variac Pass Labs 1117 14th March 2014 10:26 AM
MY FIRST BUILD BA-1 joesch1999 Pass Labs 15 15th May 2011 08:54 PM
WTB: Burning Amp BA-1 or BA-2 jdubs Swap Meet 0 23rd March 2011 03:16 AM
FS: two burning amps (one each BA-1 and BA-2) without drivers Eric Weitzman Swap Meet 15 17th February 2010 02:35 AM
Ba-1 Rembulan Pass Labs 0 15th May 2009 01:09 AM


New To Site? Need Help?

All times are GMT. The time now is 07:50 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