How to increase gain of Pearl Phono? - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 10th February 2006, 03:07 PM   #1
henkel is offline henkel  Malaysia
diyAudio Member
Join Date: Aug 2005
Default How to increase gain of Pearl Phono?


The Pass Pearl phono stage is my first full DIY project from ground up. Hence I would consider myself a DIY newbie.

The Pearl was complete about a week ago and mated to my Rega Elyias MM cartridge. But I find that, with the Pearl in my set up, I need 3-5db more gain.

Can any helpfull soul please tell me what I need to do to get more gain?

BTW, I already did a search but did not find the specific answer.

Your help is highly appreciated.

  Reply With Quote
Old 12th February 2006, 02:27 PM   #2
henkel is offline henkel  Malaysia
diyAudio Member
Join Date: Aug 2005
Any one? please?
  Reply With Quote
Old 25th February 2006, 03:09 PM   #3
henkel is offline henkel  Malaysia
diyAudio Member
Join Date: Aug 2005
For the sake of sharing, I've learnt that to increase the Pearl Phono gain is R19. It originaly has a value of 499R but I have increased the resistor value to 909R to get the desired gain.

Many thanks to Promithues for helping me out.

Hope this can help future Pearl builders who requires higher gain.

Lastly, many thanks to Nelson Pass for sharing this wonderfull design.
  Reply With Quote
Old 25th February 2006, 03:25 PM   #4
diyAudio Member
wuffwaff's Avatar
Join Date: Aug 2001
Location: Ingolstadt Germany

changing this resistor to 909R will also double the voltage drop over it. Watch out that the cascode is still working as it should or up the supply voltage for this gain stage.

een ooievaar is geen konijn want zijn oren zijn te klein!
  Reply With Quote


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
Marshall AVT 50 preamp gain/distortion increase Voland Instruments and Amps 3 27th November 2010 01:05 PM
HOW TO increase the class-d's gain? aobuke Class D 3 13th February 2009 08:17 PM
How do I increase gain in sub crossover? paulspencer Solid State 19 1st September 2006 11:10 AM
Need help - trying to increase gain by paralleling triode sections Saurav Tubes / Valves 14 18th November 2003 06:08 AM
Pearl -- does it have enough gain? Petter Pass Labs 10 26th April 2002 04:22 PM

New To Site? Need Help?

All times are GMT. The time now is 01:50 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2