Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Coupling cap. values???
Coupling cap. values???
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 7th January 2006, 05:03 PM   #1
stoo is offline stoo  Canada
diyAudio Member
Join Date: Sep 2004
Location: Burnaby B.C. Canada
Default Coupling cap. values???

Hello everyone!
Trying to get a handle on the coupling cap. values for the Phase inverter to P-P output tubes. I've looked at Marshall schematics and they are any where from .022uf to .47 uf with .022 and .1 being the majority!! What's the science here??
Thaanx in advance!
  Reply With Quote
Old 8th January 2006, 04:39 AM   #2
aletheian is offline aletheian  United States
diyAudio Member
aletheian's Avatar
Join Date: Apr 2004
Location: Philly
Here you go:

All the math you need. The Co in conjunction with the following impedance to ground sets the low freq rolloff. The deeper the bass, the more change of ugly grid blocking (or "farting out" as they call it in the guitar world). So it is a trade off of sufficient bass response and potential blocking.
Heghlu'meH QaQ jajvam!
  Reply With Quote


Coupling cap. values???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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
values of ground(?) coupling caps in Aikido cbutterworth Tubes / Valves 1 31st October 2007 03:53 PM
Calculating values for input coupling capacitor officeboy Chip Amps 14 29th January 2006 04:41 PM
changing (de)coupling cap values Klimon Tubes / Valves 14 25th April 2005 09:33 AM
coupling capacitor intermediate values adam12 Tubes / Valves 3 12th February 2005 09:44 PM

New To Site? Need Help?

All times are GMT. The time now is 04:37 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio