Pearl Phono PCBs - 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 11th January 2002, 06:24 PM   #1
diyAudio Member
 
Join Date: Jan 2002
Location: germany
Default Pearl Phono PCBs

Hi,

Im new registrated.
I have Aleph Pre 1.7 and Aleph 5.
Now Im intrested in building the PearlPhono, but Im not electrical skilled.

Questions:
Where do I get PCBs ?
Do one need C14 + C16 and if so what effect on soundquality will result ?
Do I have to match the JFETs ? If yes, how many do I have to buy to get reasonable matching results ?

Wayne Colburn does not mention anything about the +/- 9V Battery supply ?? Is it not necessary ??
__________________
M.Weil
  Reply With Quote
Old 12th January 2002, 08:23 PM   #2
wayne is offline wayne  United States
diyAudio Member
 
Join Date: Jan 2002
Location: Northern California
Default Pearl Phono Boards

The battery can be used as a reference instead of a 9.1 Volt Zener.

The Pc boards are available at passdiy.com

Wayne
  Reply With Quote
Old 17th January 2002, 09:22 AM   #3
hifi is offline hifi  Sweden
diyAudio Member
 
Join Date: Mar 2001
Location: sweden
when using the battery should the zener be removed??...isnt that used to lower the voltage?
  Reply With Quote
Old 17th January 2002, 06:48 PM   #4
wayne is offline wayne  United States
diyAudio Member
 
Join Date: Jan 2002
Location: Northern California
Default Battery on Pearl

If using the battery the Zener is removed. This is the reference for the regulator differential amplifier.
  Reply With Quote
Old 19th January 2002, 07:44 PM   #5
diyAudio Member
 
Join Date: Jan 2002
Location: Slovenia, Europe
Question Battery advantage over Zener in Pearl?

Wayne,

Can you explain the possible advantage of a 9V reference battery over a 9.1 V Zener in a Pearl phono preamp, please? Any percieved sonic difference in a listening test?
I am about to build the Pearl phono and would like to know if it is worthwhile to provide space for the batteries.

Regards,

Andrej
  Reply With Quote
Old 19th January 2002, 09:02 PM   #6
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
Batteries are very, very quiet. Obviously a nifty trait when one is trying to build a phono stage. The downside is that they have to be replaced every so often. Zeners are forever, but at the expense of some noise.
I've heard people say that batteries sound better, aside from the noise issue. I have no opinion on this. Perhaps Wayne will be able to say more.
Your choice.
You could, I suppose, have a switched voltage reference. Zener for daily use, and battery for serious listening.

Grey
  Reply With Quote
Old 19th January 2002, 10:01 PM   #7
wayne is offline wayne  United States
diyAudio Member
 
Join Date: Jan 2002
Location: Northern California
Default Battery

The battery does give less measured noise. I didn't listen to it.
The Pearl could actually be powered by batteries as has been suggested.
  Reply With Quote
Old 27th August 2002, 01:00 AM   #8
diyAudio Member
 
Join Date: Aug 2002
Location: CA USA
Default Pearl on Batteries

Im considering battery power for the Pearl and was wondering how much of the filter section should be retained either as filter or as current capacity. Would a series of 3 twelve volt batteries leading into pads 1& 2 work or could I just put 2 batteries before C15.


Im a bit concerned that housing the batteries distant from the circuit will allow the pick up of stray fields.

Is it likely that batteries will offer a significant advantage for a power supply in this application.

Im new to this so any advice would be helpful
  Reply With Quote
Old 28th August 2002, 02:28 AM   #9
wayne is offline wayne  United States
diyAudio Member
 
Join Date: Jan 2002
Location: Northern California
The two batteries would allow you to eliminate the 9610 Mosfet and diff pair circuit. Charged batteries at 13 Volts would be a little low but work fine.
  Reply With Quote
Old 22nd May 2005, 10:40 AM   #10
Buhl is offline Buhl  Denmark
diyAudio Member
 
Buhl's Avatar
 
Join Date: May 2002
Location: Aalborg, Denmark
Default Pearl Battery voltage reference ?

If I choose to use the 9 volt battery instead of the zeners, how long time could I expect the batterys to last - is the current draw so small that I could expect once a year or so ?? What if the battery gets to old, and the voltage drops, how would it be heard ??


Cheers !
Hans
  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
PCB for Pearl Phono Pre sonix Pass Labs 2 4th March 2006 11:41 PM
pearl phono bernification Pass Labs 2 7th February 2006 08:44 PM
Pearl Phono Done (almost) Gregorio Pass Labs 0 16th January 2006 01:42 PM
pearl phono pcb P270 Pass Labs 2 15th June 2005 01:49 PM
pearl phono hsort Pass Labs 5 2nd March 2002 09:26 PM


New To Site? Need Help?

All times are GMT. The time now is 03:50 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