Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki 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

KT88s and grid current
KT88s and grid current
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
Reply
 
Thread Tools Search this Thread
Old 21st March 2008, 07:31 PM   #1
SpreadSpectrum is offline SpreadSpectrum  United States
diyAudio Member
 
SpreadSpectrum's Avatar
 
Join Date: Nov 2007
Default KT88s and grid current

How do KT88s perform in AB2(triode connected)? Anybody ever done it? Dumb idea?
  Reply With Quote
Old 21st March 2008, 08:00 PM   #2
Bandersnatch is offline Bandersnatch  United States
diyAudio Member
 
Join Date: Jul 2003
Location: Ann Arbor, MI
hey-Hey!!!,
Heathkit and McIntosh ran them to grid current in W6m, MC60 and MC75 designs. I can't see why triode connection would pose any significant trouble.
cheers,
Douglas
__________________
the Tnuctipun will return
  Reply With Quote
Old 21st March 2008, 08:17 PM   #3
SpreadSpectrum is offline SpreadSpectrum  United States
diyAudio Member
 
SpreadSpectrum's Avatar
 
Join Date: Nov 2007
I was mainly concerned with:

1. Grid dissipation. There is a potential to drive the grid quite a ways positive when triode connected. Don't know if this would cause harm.

2. Grid stopper, which I kind of thought was necessary. However, the designs you pointed out omit them.
  Reply With Quote
Old 21st March 2008, 08:33 PM   #4
Bandersnatch is offline Bandersnatch  United States
diyAudio Member
 
Join Date: Jul 2003
Location: Ann Arbor, MI
hey-Hey!!!,
Grid stopper resistors would create distortion due to the voltage developed across them as grid current flowed. As yu noted, where it is reasonably expected, they are left out.
cheers,
Douglas
__________________
the Tnuctipun will return
  Reply With Quote

Reply


KT88s and grid currentHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bias supply and grid current boywonder Tubes / Valves 29 29th September 2009 05:52 PM
2A3 Max Grid Current Rating? rdf Tubes / Valves 0 7th July 2009 03:10 AM
6AS7G with grid current? Wavebourn Tubes / Valves 1 17th November 2006 12:22 AM
KT66 SE amp, grid current or not? jhaible Tubes / Valves 18 25th October 2006 11:56 AM
Current limit of EL84 grid? G Tubes / Valves 10 22nd February 2003 08:08 PM


New To Site? Need Help?

All times are GMT. The time now is 12:12 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki