centre tap or floating heaters? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 22nd August 2006, 09:56 PM   #1
diyAudio Member
Join Date: Dec 2003
Location: earth
Default centre tap or floating heaters?

which is best?

and bridge or full wave 2 diode recitication?

  Reply With Quote
Old 23rd August 2006, 06:02 AM   #2
diyAudio Member
Geek's Avatar
Join Date: Sep 2004

I've used centre tap as well as floating w/one leg grounded with a 'lytic cap (2.2-4.7uF) in mic stages, where noise is very noticeable. I'd say there's at best a 6dB favor for the centre tap. However, if you tie the heaters to say, +30V, there seems moot difference between the methods.
  Reply With Quote
Old 23rd August 2006, 06:11 AM   #3
diyAudio Moderator
TonyTecson's Avatar
Join Date: May 2003
Location: Palatiw, Pasig City
a two diode full wave bridge has one side of the transformer cut-off, doing nothing, at reverse phase.

a 4 diode full wave bridge otoh uses the full secondary winding at all times, therefore in terms of transformer utilisation is better the the 2 diode ones.
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
  Reply With Quote
Old 23rd August 2006, 06:35 AM   #4
cm_ls1 is offline cm_ls1  Australia
diyAudio Member
Join Date: Mar 2006
Location: AUs
i found

referencing the centre tap of the heater to 1/4 b+ with a voltage divider coupled to earth the quietest .

next best was grounding the CT

and floating produced quite a bit of hum

this is with ac heaters
  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
Heaters and centre tap duderduderini Tubes / Valves 10 17th November 2010 10:38 AM
PSU for 12V DC heaters cbutterworth Tubes / Valves 15 9th March 2007 06:25 AM
Phantom centre channel with centre channel lol Toast_Master Multi-Way 5 5th December 2006 03:54 AM
Floating the heaters YoungFred Tubes / Valves 2 16th September 2006 10:59 AM
X- amp, centre-tapped vs floating drive. Circlotron Pass Labs 3 23rd January 2005 01:48 AM

New To Site? Need Help?

All times are GMT. The time now is 06:48 AM.

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