Burning Amp BA-3b (Balanced) - Page 12 - 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 12th December 2011, 08:31 PM   #111
Variac is offline Variac  United States
diyAudio Editor
 
Variac's Avatar
 
Join Date: Dec 2001
Location: San Francisco, USA
So you (and Papa) are saying that even with the canceling of 2nd harmonic due to balanced construction, playing with P3 can still affect the sound and specs significantly?

Quote:
Originally Posted by Zen Mod View Post
you have symmetry effect between halves due to common 200 ohms resistor and overall effect of bridging .
if Papa sez that invoking 2nd harmonic can still be higher than symmetry effects , I'm not doubting that ....
  Reply With Quote
Old 12th December 2011, 09:03 PM   #112
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
well - that's at least how I understood what Papa was writing
__________________
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 20th February 2012, 03:39 PM   #113
biju55 is offline biju55  India
diyAudio Member
 
biju55's Avatar
 
Join Date: Jul 2011
Location: Kuwait and India
Send a message via Skype™ to biju55
Default BA-3b (Balanced)




BA-3B + BA-2 = XA 30.5 ?

Last edited by biju55; 20th February 2012 at 03:53 PM.
  Reply With Quote
Old 20th February 2012, 03:42 PM   #114
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Different circuit.

  Reply With Quote
Old 20th February 2012, 04:02 PM   #115
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Quote:
Originally Posted by biju55 View Post


BA-3B + BA-2 = XA 30.5 ?
BA-3B is not SUSY, so not possible.
  Reply With Quote
Old 20th February 2012, 04:29 PM   #116
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
I think it's a riddle.

(not that me know the answer)
__________________
The buck stops Here
  Reply With Quote
Old 20th February 2012, 06:38 PM   #117
generg is offline generg  Germany
diyAudio Member
 
generg's Avatar
 
Join Date: Jul 2009
Location: Near Frankfurt
I can only say that I like, nearly similar like Botte, the sound of the BBA-3 most when both types of distortion are nearly equal.....

best of both worlds for my ears.......

may be they only like to resonate on more than one frequency.......
__________________
and the First Wtt is......a really First Class PSS Idea
  Reply With Quote
Old 12th March 2012, 02:17 PM   #118
Darry is offline Darry  France
diyAudio Member
 
Join Date: Mar 2005
Location: Southwest
Hi,

The BA3 Front End can be connected either with BA-1 or BA-2 output stages.

The BA3 Front End with BA-1 output stage (+ / -32 volt rails) : output power limited to 50W into 8 ohms, 25W into 4 ohms, 12 W on 2 ohms.

I think that the balanced BBA3 Front End (+ / -32 volt rails) must be connected with the official BA # 2 push-pull output stage.pour get close to 200W into 8 ohms.

I think that the balanced BBA3 with official output stage BA-1 (+ / -32 volt rails) will always be the power of 50W into 8 ohms, 25W into 4 ohms, 12 W on 2ohms.

I'm right?

Thank you for your answer

Regards

Darry
  Reply With Quote
Old 12th March 2012, 04:40 PM   #119
diyAudio Member
 
bobodioulasso's Avatar
 
Join Date: May 2008
Quote:
I think that the balanced BBA3 Front End (+ / -32 volt rails) must be connected with the official BA # 2 push-pull output stage.pour get close to 200W into 8 ohms.

Hi, Jean-Luc.

200W classA! What a dissipation!

Provided you bias the output stages twice as much as the 50w unbalanced version.

Or do you mean 50w classA only, 200W classAB?

Last edited by bobodioulasso; 12th March 2012 at 04:47 PM.
  Reply With Quote
Old 13th March 2012, 08:28 PM   #120
JimM is offline JimM  United States
diyAudio Member
 
Join Date: Jul 2006
In simulation with +/- 32 volt supplies I get a peak to peak swing of around +/- 45 volts from the front end so Vrms = 31.82volts and p= vrmsxvrms / RL or around 126.5 watts for 8 ohm and around 253 watts for 4 ohm. This is with BA2 P-P back end and with ideal values, but you should get around 100 watts at 8 ohms and 200 watts at 4 ohms. This is with a bias of around 12 to 15 watts class A and then into Class AB unless you have really really big heat sinks.
  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 Amp BA-3 Backbones Pass Labs 1718 27th August 2014 04:09 PM
Burning Amplifier BA-2 Variac Pass Labs 1125 1st July 2014 01:39 PM
Burning Amplifier BA-2 Nelson Pass diyAudio.com Articles 5 14th September 2011 06:11 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


New To Site? Need Help?

All times are GMT. The time now is 07:49 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