Go Back   Home > Forums > >

Pass Labs This forum is dedicated to Pass Labs discussion.

The BA-3 as preamp build guide
The BA-3 as preamp build guide
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
Old 5th September 2021, 05:57 PM   #2171
myleftear is offline myleftear  Switzerland
diyAudio Member
 
myleftear's Avatar
 
Join Date: Sep 2017
Location: Luzern
The BA-3 as preamp build guide
Default The BA-3 as preamp build guide

u
The BA-3 as preamp build guide
__________________
dobedobedo...
  Reply With Quote
Old 5th September 2021, 06:03 PM   #2172
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
The BA-3 as preamp build guide
F=1/(2*Pi*R*C) ; [Hz,Ohm,Farad]
__________________
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 5th September 2021, 06:10 PM   #2173
myleftear is offline myleftear  Switzerland
diyAudio Member
 
myleftear's Avatar
 
Join Date: Sep 2017
Location: Luzern
The BA-3 as preamp build guide
Default The BA-3 as preamp build guide

shaking those bloodydarnhieroglyphs out of your sleeve, you wizard? thank you ZM!
I‘ll fall asleep tonight mumbling π…

Edit: „elaborate“ above was of course towards me!
editedit: You've been there already of course! The BA-3 as preamp build guide
__________________
dobedobedo...

Last edited by myleftear; 5th September 2021 at 06:25 PM.
  Reply With Quote
Old 5th September 2021, 06:46 PM   #2174
amandarae is offline amandarae  Philippines
diyAudio Member
 
amandarae's Avatar
 
Join Date: Oct 2004
Location: Diamond Bar, CA USA
Quote:
Originally Posted by ozorfis View Post
Recently I slapped some FT-3 teflon bypass caps on mine and didn´t care much as those are in a metal housing.

Of course I could be wrong but that´s at least how I did it.

Have great day
I beg to differ. I use FT-3 (0.22uF) to bypass, connected each to C3 close to the V-, and Bob is your uncle! Nice crisp sound for me.
I am convinced however that adjusting H2 and H3 has a profound influence to the tone and dynamics of the BA-3 FE than changing comparable type of the capacitors on the output.
Attached Images
File Type: jpg IMG_2237.jpg (593.3 KB, 248 views)
__________________
The power supply of my power supply is my FRIEND!
  Reply With Quote
Old 5th September 2021, 07:51 PM   #2175
BRN is offline BRN  United States
diyAudio Member
 
Join Date: Sep 2006
Location: Metro DC area
The BA-3 as preamp build guide
Quote:
Originally Posted by amandarae View Post
I beg to differ. I use FT-3 (0.22uF) to bypass, connected each to C3 close to the V-, and Bob is your uncle! Nice crisp sound for me.
I am convinced however that adjusting H2 and H3 has a profound influence to the tone and dynamics of the BA-3 FE than changing comparable type of the capacitors on the output.
I have a pair of FT-3 caps in 0.22uF and 0.1uF values, so may through them in and see what the effect on sound is.
  Reply With Quote
Old 5th September 2021, 08:18 PM   #2176
myleftear is offline myleftear  Switzerland
diyAudio Member
 
myleftear's Avatar
 
Join Date: Sep 2017
Location: Luzern
The BA-3 as preamp build guide
Quote:
Originally Posted by amandarae View Post
…adjusting H2 and H3 has a profound influence...
Argh! A new riddle! I only had my toe in the H2/H3-waters (by way of the H2-jig of lately)! Do I have to re-read the docs or is it stated elsewhere?
__________________
dobedobedo...
  Reply With Quote
Old 5th September 2021, 08:35 PM   #2177
cubicincher is offline cubicincher  Germany
diyAudio Member
 
Join Date: Mar 2016
Location: Hechingen, South of Germany
Default to myleftear #2176

Hello myleftear,


this is a part of the article from Mister Pass - BA-3:


There is a pot P3 to adjust this....



Cheers
Dirk
Attached Images
File Type: jpg art_ba_3 pdf.jpg (132.8 KB, 240 views)
  Reply With Quote
Old 5th September 2021, 10:16 PM   #2178
amandarae is offline amandarae  Philippines
diyAudio Member
 
amandarae's Avatar
 
Join Date: Oct 2004
Location: Diamond Bar, CA USA
Discussion starting at post #2102 in The BA-3 as preamp build guide might help.

From what I learned, H2 for warmth and H3 for detail/dynamics.
In my case, I copied the spectrum for the ACP+ and used it as my starting point, then adjust to get +5dB on H3 (which in turn reduces H2). I like the sound so far and left it there but definitely a lot of combinations to try.
__________________
The power supply of my power supply is my FRIEND!
  Reply With Quote
Old 6th September 2021, 04:39 AM   #2179
myleftear is offline myleftear  Switzerland
diyAudio Member
 
myleftear's Avatar
 
Join Date: Sep 2017
Location: Luzern
The BA-3 as preamp build guide
Good morning my friends! Thank you so much for—ding!—pointing me to it. The solution, „P3“, reminds me of the Hitchhiker in the Galaxis‘ „42“, haha.
__________________
dobedobedo...
  Reply With Quote
Old 6th September 2021, 07:54 AM   #2180
ozorfis is offline ozorfis  Germany
diyAudio Member
 
ozorfis's Avatar
 
Join Date: May 2020
Location: southern Germany
Default FT-3 are awesome

Quote:
Originally Posted by amandarae View Post
I beg to differ. I use FT-3 (0.22uF) to bypass, connected each to C3 close to the V-, and Bob is your uncle! Nice crisp sound for me.
I am convinced however that adjusting H2 and H3 has a profound influence to the tone and dynamics of the BA-3 FE than changing comparable type of the capacitors on the output.
For sure those FT-3 are awesome bypass capacitors - I use them everywhere, where I can fit them. My comment was regarding the "polarity" meaning the orientation of inner and outer foil of the FT-3 cap not being that important, as they are shielded in a metal housing. I wanted to hint at those caps and the shielding topic.
__________________
go all the way
  Reply With Quote

Reply


The BA-3 as preamp build guideHide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
BA-3 As Preamp vdi_nenna Pass Labs 1388 16th August 2021 12:48 PM
MyRefC build guide AndrewT Chip Amps 1119 29th July 2016 10:30 PM
Trapezoid build guide? mudchute Planet 10 hifi 22 10th November 2014 09:37 AM
MY FIRST BUILD BA-1 joesch1999 Pass Labs 15 15th May 2011 08:54 PM
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 06:18 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 13.64%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki