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 14th October 2011, 11:14 PM   #271
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Quote:
Originally Posted by Backbones View Post
Haven't you heard? Something now travels faster than the speed of light. No it isn't money out of our banks. They found something at CERN.
We'll see.

  Reply With Quote
Old 14th October 2011, 11:31 PM   #272
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
naah

it will not help us to see faster

__________________
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 15th October 2011, 12:29 AM   #273
flg is offline flg  United States
diyAudio Member
 
flg's Avatar
 
Join Date: Jul 2005
Location: North East
Or hear Faster?
__________________
"It was the perfect high end audio product: Exotic, inefficient, expensive, unavailable, and toxic." N.P.
  Reply With Quote
Old 15th October 2011, 06:44 AM   #274
diyAudio Member
 
kilohertz's Avatar
 
Join Date: Aug 2006
Location: Slightly left of Vernon, BC Canada
Quote:
Originally Posted by tinitus View Post
E=mc2
just joking

x 10
No no no no.... It's E=mc2 +/- 3dB

Cheers

Paul
  Reply With Quote
Old 15th October 2011, 09:42 PM   #275
generg is offline generg  Germany
diyAudio Member
 
generg's Avatar
 
Join Date: Jul 2009
Location: Near Frankfurt
Quote:
Originally Posted by Backbones View Post
I think it was generg who said the BA-3 draws about 30mA. Can the great man confirm that.
Chris
No I did not write this.....!
__________________
and the First Wtt is......a really First Class PSS Idea
  Reply With Quote
Old 15th October 2011, 09:47 PM   #276
tinitus is offline tinitus  Europe
diyAudio Moderator
 
Join Date: Nov 2005
Quote:
Originally Posted by Nelson Pass View Post
1 volt / 22 ohms = 45 mA, add about 8 mA for the Jfets.

would be just above 50mA

frontend drivers, and input jfets
I suppose one channel (?)
  Reply With Quote
Old 15th October 2011, 09:59 PM   #277
generg is offline generg  Germany
diyAudio Member
 
generg's Avatar
 
Join Date: Jul 2009
Location: Near Frankfurt
Yes one channel.


And not the balanced version....
__________________
and the First Wtt is......a really First Class PSS Idea
  Reply With Quote
Old 16th October 2011, 07:04 AM   #278
generg is offline generg  Germany
diyAudio Member
 
generg's Avatar
 
Join Date: Jul 2009
Location: Near Frankfurt
Hi backbones,

The 30mA you mentioned was for the old front end version......
__________________
and the First Wtt is......a really First Class PSS Idea
  Reply With Quote
Old 17th October 2011, 12:32 AM   #279
diyAudio Member
 
timbarnes's Avatar
 
Join Date: Dec 2004
Location: Los Gatos
Default BA-3 up and running

I just received my output transistors from zhoufang (thank you!) and was able to finish my BA-3 as a standalone gain stage today.

I built it in two enclosures: one for the power supply and one for the gain stage, and then there's a third passive switching and volume box. Some of you might have seen it in partially built form at Burning Amp in the Pass Pub.

I'm running the gain stage at about 32V, with P1 and P2 close to max to get 1V across R10 and R11. I can get the DC offset very close to zero, but I have no idea how to set P3, because I don't have a distortion meter.

I'll post some pictures over in the appropriate forum in a bit: haven't uploaded the images yet.

At present I don't have a power switch, but I think I'll put one in: the power draw is enough to make it worthwhile.

I'm using the BA-3 to drive my recently completed F4: the combination is sounding pretty good, and another step up after the JBOZ. More weight in the bass, plenty of clarity at the top, very "present" vocals.

More impressions as I get to know it better. I'll probably go back in in a week or so and re-align it. Right now I prefer to listen to music .
__________________
Townshend Rock III w/ DC motor, Hagerman Bugle 2, Naim CD5i, Voyage MPD, ODAC, MiniDSP, Pass BA-3 and F4, Parham Pi Sevens
RC Preamp (in progress), DIY Silver cables, Open Baffle BOFU, DIY subwoofer, GainClone, o2 Headphone Amp
  Reply With Quote
Old 17th October 2011, 04:54 AM   #280
diyAudio Member
 
timbarnes's Avatar
 
Join Date: Dec 2004
Location: Los Gatos
Quote:
Originally Posted by timbarnes View Post
I'll post some pictures over in the appropriate forum in a bit: haven't uploaded the images yet.
Here's a picture to be going on with...
Click the image to open in full size.
__________________
Townshend Rock III w/ DC motor, Hagerman Bugle 2, Naim CD5i, Voyage MPD, ODAC, MiniDSP, Pass BA-3 and F4, Parham Pi Sevens
RC Preamp (in progress), DIY Silver cables, Open Baffle BOFU, DIY subwoofer, GainClone, o2 Headphone Amp
  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-1 Variac Pass Labs 337 26th November 2013 07:35 PM
Burning Amplifier BA-3 Nelson Pass diyAudio.com Articles 32 16th July 2013 09:45 PM
Burning Amplifier BA-1 Nelson Pass diyAudio.com Articles 3 24th October 2011 02:53 AM
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


New To Site? Need Help?

All times are GMT. The time now is 03:43 AM.


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