SOund of 3B28 vs. 866A - 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 13th March 2008, 01:55 AM   #1
diyAudio Member
korneluk's Avatar
Join Date: Jan 2005
Location: South Florida
Default SOund of 3B28 vs. 866A


Has anyone compared the sound of the 3B28 xenon rectifier vs. the 866A and 83 mercury types? If so, which do you prefer and why?


-- josé k.
  Reply With Quote
Old 13th March 2008, 02:36 AM   #2
diyAudio Member
Tubelab_com's Avatar
Join Date: Jul 2005
Location: West Virginia panhandle
They are interchangeable in most circuits. I have both, you can borrow them when you get that monster built. 3B28 has a pale purpleish white glow visible only at relatively high current in a dark room.

FG32's are in the truck, remind me tomorrow.
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
  Reply With Quote
Old 13th March 2008, 04:34 AM   #3
diyAudio Member
Join Date: Sep 2006
Monster eh, sounds interesting

I remember seeing a post about the 866 having less sag, but i can't find it. More sag will make your amp sound more like a tube amp.

The 866 will also need a few minutes warm up time where as the 3B28 does not.
  Reply With Quote
Old 13th March 2008, 08:48 AM   #4
Gluca is offline Gluca  Italy
diyAudio Member
Gluca's Avatar
Join Date: Nov 2004
Location: Back to Italy
Originally posted by ak_47_boy

The 866 will also need a few minutes warm up time where as the 3B28 does not.
Nah ... 10-30 secs are enough if you use the tube every day. Warm it 1 hour or more after the first installation before applying any high voltage. If it doesn't light up after a couple of attemps and it keeps on blowing your fuses just forget it, sometime it happens with MV rectifiers.

  Reply With Quote
Old 13th March 2008, 02:19 PM   #5
diyAudio Member
Join Date: Mar 2003
Location: NYC
to me the 3B28 has a solid state sound whereas I find mercury to be very full and musical.

  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
filter circuit for 866a Masami Power Supplies 4 15th April 2017 09:28 AM
using 24G and 3B28 in an od ball amp....... diesel_tech Tubes / Valves 6 7th October 2007 05:40 PM
866a Min operating voltages timothyldodd Tubes / Valves 10 12th September 2007 01:18 PM
866A tubes WALTER BURKHARD Swap Meet 0 27th June 2003 02:07 PM

New To Site? Need Help?

All times are GMT. The time now is 06:53 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