"Bevois Valley" in triode, what to do with the feedback? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

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
Reply
 
Thread Tools Search this Thread
Old 24th April 2009, 05:14 PM   #1
pwan is offline pwan  United Kingdom
diyAudio Member
 
Join Date: Apr 2006
Location: Earth
Default "Bevois Valley" in triode, what to do with the feedback?

Hello

If I wired "Bevois Valley" in triode (using 560 Ohm Rk), what to do with the feedback?

A. Leave the current one as is
B. Remove them out ( i.e. no negative feedback)
C Adjust the value of feedback (if then, to what value?)

Thanks.
  Reply With Quote
Old 24th April 2009, 05:58 PM   #2
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
According to the Mullard data sheet, you get 5W out of PP triode-connected EL84. In voltage terms, that's really not much different to 10W, so why not just try the feedback as is and see whether you like it?

To remove the feedback, undo the end of the feedback resistor going to the output transformer and connect it directly to ground.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote

Reply


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
Morgan Jones's Bevois Valley amp... nickds1 Tubes / Valves 49 23rd May 2012 06:23 AM
PP EL84 Build Questions (Bevois Valley) cgrums Tubes / Valves 19 16th July 2008 06:37 PM
Bevois Valley Design Question cgrums Tubes / Valves 32 9th July 2008 01:20 PM
Bevois Valley and parallel push pull pbholmen Tubes / Valves 11 3rd November 2007 02:44 PM
Kofi Annan in: "Oscillatin' in the Bevois Valley'" Kofi Annan Tubes / Valves 88 21st July 2007 10:16 PM


New To Site? Need Help?

All times are GMT. The time now is 09:24 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2