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

phase splitter question
phase splitter question
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 30th October 2005, 11:10 PM   #1
stoo is offline stoo  Canada
diyAudio Member
Join Date: Sep 2004
Location: Burnaby B.C. Canada
Default phase splitter question

My guitar amp has a phase splitter that uses a triode with equal cathode and anode resisters so the outputs are taken from the anode and cathode.
How does the other variety work????? Where there are two triodes. the signal from the preamp is fed into one grid. I don't know where the other triode gets it's signal. Each phase is taken from each plate. ( I think Marshall uses this config.)
  Reply With Quote
Old 30th October 2005, 11:39 PM   #2
andyjevans is offline andyjevans  United Kingdom
diyAudio Member
Join Date: Sep 2003
Location: London
the phase splitter you describe in your amp is the concertina or split load. the other one you refer to is the differential pair, where the signal goes to the first grid, which usually has a 1 meg resistor to the second grid and a small cap from there down to ground (.1uF or a bit more). The second half is driven from the joined cathodes, which have a single resistor to earth (or CCS). As you say, each half has its own anode resistor, and the outputs are from the anodes. If you do a search on concertina and differential pair (diff. pair, long tailed pair) you should pull up some info. Or look at Morgan Jones book "Valve AMplifiers" - a jolly good buy for boning up on theory. Andy
  Reply With Quote
Old 31st October 2005, 06:00 AM   #3
ray_moth is offline ray_moth  Indonesia
diyAudio Moderator Emeritus
ray_moth's Avatar
Join Date: Jan 2004
Location: Jakarta
You can find a couple of technical articles on the long-tail pair splitter at Aitken Amps
  Reply With Quote
Old 2nd November 2005, 04:46 AM   #4
aletheian is offline aletheian  United States
diyAudio Member
aletheian's Avatar
Join Date: Apr 2004
Location: Philly
There were a couple good conversations on here about the LTP (long tail pair)/differential splitter and the concertina/cathodyne/split-load that you can find if you do a search. You can check over at ax84.com on the BBS to get some great info too.
Heghlu'meH QaQ jajvam!
  Reply With Quote


phase splitter questionHide 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
Is this a phase splitter? tom-vdl Solid State 9 15th October 2009 09:21 PM
Phase splitter types slideman82 Tubes / Valves 73 15th October 2009 06:09 PM
Phase splitter which tube? Elektor78 Tubes / Valves 26 27th February 2009 11:55 PM
phase splitter with Tr ? sam8888ysl Tubes / Valves 9 22nd October 2008 12:28 PM
Phase Splitter Name Gold_xyz Tubes / Valves 17 21st February 2008 10:48 AM

New To Site? Need Help?

All times are GMT. The time now is 10:32 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