Screen driven output stage - 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 30th November 2008, 10:23 PM   #1
nhuwar is offline nhuwar  United States
diyAudio Member
nhuwar's Avatar
Join Date: Jan 2007
Location: Cypress Texas
Default Screen driven output stage

Hi all,

Just wandering if anyone out there has tried to run a 813 in screen drive mode? I'm talking se by the way. I was thinking about trying it and was curious if anyone had any advice.

  Reply With Quote
Old 1st December 2008, 05:06 PM   #2
SY is offline SY  United States
diyAudio Moderator
SY's Avatar
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 2
Just from a quick look at the datasheet, the 813 doesn't seem like a good candidate- the screen drive requirements are much too high. Ideally, you'd want a tube where something less than 200V will get the tube conducting hard (thus the suitability of high perveance sweep tubes). The 813 looks like if would want at least 400V which is a pretty challenging drive level.

In theory, you could use a stepup transformer to hit the required swing, but at those drive levels, it would be an expensive and tricky proposition.
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
  Reply With Quote
Old 1st December 2008, 05:10 PM   #3
nhuwar is offline nhuwar  United States
diyAudio Member
nhuwar's Avatar
Join Date: Jan 2007
Location: Cypress Texas
Thanks SY

Don't know to much about screen driving so figured I'd ask. You answered some other question I had too, thanks.
  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
6GB5 and Variants as Screen Driven Amps wrenchone Tubes / Valves 67 3rd October 2016 11:29 PM
Transformer-driven SEPP output stage. Circlotron Solid State 17 20th February 2015 03:22 PM
Has anyone screen driven an EL84? Lingwendil Tubes / Valves 11 22nd April 2009 03:04 AM
6JN6 screen-drive (g2 driven) plate curves? GordonW Tubes / Valves 26 23rd April 2008 01:56 PM
Screen driven EL36 / 6CM5 /PL36 /25E5 Tubes4e4 Tubes / Valves 2 26th February 2006 12:00 PM

New To Site? Need Help?

All times are GMT. The time now is 08:03 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