Quick question on pots for guitar pre - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

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 20th April 2011, 05:34 PM   #1
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
Default Quick question on pots for guitar pre

Hi, I'd like to make this simple preamp for the guitar amp of a friend of mine.
I only have 250k pots for VR3A and VR4A at the moment. Do I need to scale the capacitors accordingly?

http://sound.westhost.com/p02_fig2.gif
__________________
Gravity - Making the G since 13.7 billion B.C.
  Reply With Quote
Old 21st April 2011, 12:43 AM   #2
diyAudio Member
 
Join Date: Nov 2008
Download the "Tone Stack Calculator" and play with the "James" circuit.
The connection between L-Tape and pin 1 of U1A should not be there. Also rethink the need for R21/R22 and C4/R17/R24.
E
  Reply With Quote
Old 21st April 2011, 11:17 PM   #3
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
Thanks E,

I completely forgot about this awesome software. I ended up building a variation of the James circuit. Tonestack FTW.
I'll report back once it works.
Attached Images
File Type: jpg 2011-04-21 23.50.28.jpg (387.5 KB, 16 views)
__________________
Gravity - Making the G since 13.7 billion B.C.
  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
second series punch75 (pre-HD) trim pots Clipped Car Audio 2 21st March 2010 01:44 AM
Trimmer pots for onboard guitar preamp tone controls? Tech Analog Line Level 2 19th September 2009 04:17 PM
Built a quick 26 pre yesterday..nice so far,, JandG Tubes / Valves 0 6th October 2007 10:30 PM
Quick And Dirty ~75W Guitar Amp sorenj07 Tubes / Valves 7 5th June 2007 12:00 AM
guitar pots. travis Everything Else 5 22nd April 2002 03:52 AM


New To Site? Need Help?

All times are GMT. The time now is 02:43 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