B1 preamp build thread - Page 5 - 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 18th December 2012, 09:53 PM   #41
diyAudio Member
 
Join Date: Jan 2012
Location: Kansas City
Quote:
Originally Posted by 6L6 View Post
Sorry that there wasn't a more timely reply...

Those caps will be fine.
Thanks 6L6. This is my first build ever. I have been collecting parts over the past few months. I do not have any soldering experience so I have been practicing that on a bread board. I hope to start work on my B1 next week. I'm sure I will have a few more questions before I'm done.

Thanks again,

Nikhil
  Reply With Quote
Old 19th February 2013, 03:44 AM   #42
diyAudio Member
 
Join Date: Jan 2012
Location: Kansas City
Default diode polarity

Hi could some one please tell me if the diode has been soldered with the correct polarity.


Thanks
Attached Images
File Type: gif diode.gif (275.4 KB, 687 views)
  Reply With Quote
Old 19th February 2013, 04:39 AM   #43
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
No.

The line on the diode needs to be on the same side as the line on the PCB drawing.
  Reply With Quote
Old 19th February 2013, 02:52 PM   #44
diyAudio Member
 
Join Date: Jan 2012
Location: Kansas City
Thanks will get this rectified tonight and post some more pics.
  Reply With Quote
Old 20th February 2013, 07:29 AM   #45
jpedro is offline jpedro  Portugal
diyAudio Member
 
Join Date: Jul 2010
Location: close to Lisbon
Default B1 power by batteries

I have a question and need your help.
I am thinking to use two 12-volt batteries to power the B1.
Two 12V batteries actually gives 26.4 V 13.2 V at full load x 2, and Mr. Nelson Pass says the power is 18 to 24V.
Will there be any problem with the B1 using higher voltage?
A friend of mine has done the experiment using two 9 volt batteries and the sound is something spectacular, much better, more limpid than using the standard PSU.
Advance grateful.
jpedro
  Reply With Quote
Old 20th February 2013, 09:10 AM   #46
diyAudio Member
 
sachu888's Avatar
 
Join Date: Jul 2010
Location: India
Quote:
Originally Posted by jpedro View Post
I have a question and need your help.
I am thinking to use two 12-volt batteries to power the B1.
Two 12V batteries actually gives 26.4 V 13.2 V at full load x 2, and Mr. Nelson Pass says the power is 18 to 24V.
Will there be any problem with the B1 using higher voltage?
A friend of mine has done the experiment using two 9 volt batteries and the sound is something spectacular, much better, more limpid than using the standard PSU.
Advance grateful.
jpedro
Original Pass B1 has 2X15000uf 25V caps,so NP suggested 18-24V.You can increase the voltage if you use 35V or higher caps,

Regards,
Sachin
  Reply With Quote
Old 20th February 2013, 10:22 AM   #47
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
if you already have 25V caps in your B1 , they will survive this low insignificant current draw without any problems at all

but if its a new build, 35V wont hurt, and may even have lower ESR

the higher voltage may change the bias setting

maybe a cap multiplier would make sense
  Reply With Quote
Old 20th February 2013, 10:45 AM   #48
jpedro is offline jpedro  Portugal
diyAudio Member
 
Join Date: Jul 2010
Location: close to Lisbon
Thank you, sachu888 and tinitus, for your precious help.
  Reply With Quote
Old 20th February 2013, 02:41 PM   #49
diyAudio Member
 
Join Date: Jan 2010
Default BOM for B1?

Does anyone have a bill of materials for the B1 for Mouser or Digikey? On other projects some folks have put together a click-through BOM that lets you just go there and a sales cart is automatically set up.
  Reply With Quote
Old 20th February 2013, 02:49 PM   #50
diyAudio Member
 
KatieandDad's Avatar
 
Join Date: Nov 2011
Location: UK
That is just being incredibly lazy.
  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
B1 builders thread Bas Horneman Pass Labs 696 14th July 2014 12:57 PM
Help diagnosing B1 Build (newbie) dasfreak Pass Labs 4 30th November 2010 01:56 AM
help with b1 + gainclone build crappyjones123 Pass Labs 4 25th June 2009 09:56 PM
B1 Preamp - Help Me! Professor smith Pass Labs 173 21st October 2008 03:55 PM


New To Site? Need Help?

All times are GMT. The time now is 04:50 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