Current sourced 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 26th January 2004, 09:16 PM   #1
Salas is offline Salas  Greece
diyAudio Chief Moderator
Salas's Avatar
Join Date: Oct 2002
Location: Athens-Greece
Default Current sourced heaters

Hello all,

I have seen through searching that some of you have actually tried out current sourcing the heaters of driver tubes. Taken we find a cool enough place in the chassis to protect the taxed heatsinked IC from longtime failure, do you recommend this method sonicwise? what possible benefits did you experience vs grounded pot AC or RC filtered DC?

Attached Images
File Type: jpg iheaters.jpg (35.5 KB, 232 views)
  Reply With Quote
Old 26th January 2004, 11:03 PM   #2
diyAudio Member
Join Date: Dec 2001
Location: Earth
Current sourced has an inbuilt slow turn first of all due to the resistor after the ccs. It helps to protect the tubes.

BEcause the current is controled, the tubes gets heated up properly, the sound of a DHT will be more consistent than using AC as mains is always changing.

Sonically ccs DC is as close to AC than normal DC without the hum.
  Reply With Quote
Old 26th January 2004, 11:05 PM   #3
diyAudio Senior Member
fdegrove's Avatar
Join Date: Aug 2002
Location: Belgium

When you make a plot of the DHT tube it will show almost the exact same curves when the heater is fed from a current source as it would fed from AC heaters.

Without the noise, hum!!.

Most of the time I prefer DC heating, that's more to my liking, YMMV.

  Reply With Quote
Old 26th January 2004, 11:09 PM   #4
diyAudio Member
Join Date: Sep 2002
Location: Oregon, USA
Plug - I have tried this, and have some parts sitting around if you're interested:

FS: DC regulator boards for 2A3 (or other) filaments
  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
Tube current regulation for series heaters' supply. engels Tubes / Valves 4 5th August 2007 10:49 PM
Current Sourced Cathode Follower dr._sleep Tubes / Valves 8 27th February 2006 08:46 PM
Current sourced heaters in a CF Salas Tubes / Valves 21 31st May 2005 09:35 PM
current sourced cascoded BLS schematic SteveG Pass Labs 48 24th July 2002 07:16 PM

New To Site? Need Help?

All times are GMT. The time now is 06:33 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