26/el-84 amp possible..? - 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 8th May 2008, 02:46 AM   #1
JandG is offline JandG  United States
diyAudio Member
Join Date: Jan 2005
Location: Washington State
Default 26/el-84 amp possible..?

I would like to try a 26 as a driver in a 2 stage amp & wonder if el-84 strapped would be a possibility..? I have prime examples of both tube type & have built a few 26 pre's with success. Any simple schemetic ideas for this .? Maybe even 26/6v6 strapped in triode. wattage is non issue.. I do have a couple pair of the Tamradio little 5k /8/600 ohm tranny's on hand I could use. Thanks J & G
  Reply With Quote
Old 8th May 2008, 02:56 AM   #2
diyAudio Member
korneluk's Avatar
Join Date: Jan 2005
Location: South Florida
Sure. Take a look at Gary Pimm's web pages for ideas.


Just replace the 45 by an EL84.

Click the image to open in full size.
  Reply With Quote
Old 8th May 2008, 03:04 AM   #3
diyAudio Member
Join Date: Apr 2004
Location: Monroe Township, NJ
A look at the data sheet shows that the type 26 exhibits both low mu and low gm.

You can get the gain you need (assuming a CDP source) by CCS loading the tube. Driving the substantial Miller capacitance of a triode wired EL84 or 6V6 could be problematic. DC coupling a ZVN0545A source follower to the anode of the # 26 solves that problem.

If you drive the amp with a line stage that has some gain, you can resistively load the # 26.
Eli D.
  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

New To Site? Need Help?

All times are GMT. The time now is 01:03 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