DC restorer - 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 3rd March 2013, 04:57 PM   #1
diyAudio Member
 
Join Date: Feb 2010
Location: Eastern Ontario CA.
Default DC restorer

Can someone explain the DC restorer zener circuit and how to apply it? I have the same 'Base' model vintage amplifier used in Bob Carver's NEW design 'http://www.bobcarver.com/vta20s.asp' in the vintage amp he used a DC restorer zener circuit to stablize the voltage drop from tubes driven close to cut-off at high output demands. "This circuit 'zener is connected to the cathode bias resisterand fed back to the grids such that thegrid bias is held at a constant voltage (Carvers used 12volts) thereby restoringthe lost DC component of thedrive signal." His words.

kingfisher
  Reply With Quote
Old 23rd July 2013, 03:16 PM   #2
diyAudio Member
 
Join Date: Aug 2008
It should be on another thread, sorry.

Last edited by LinuksGuru; 23rd July 2013 at 03:42 PM.
  Reply With Quote
Old 23rd July 2013, 04:01 PM   #3
Yvesm is offline Yvesm  France
diyAudio Member
 
Yvesm's Avatar
 
Join Date: Jul 2004
Location: Ardeche
No possible answer without seeing a schemo . . .
  Reply With Quote
Old 23rd July 2013, 07:37 PM   #4
diyAudio Member
 
Join Date: Jun 2011
its a simple auto bias circuit. so the amp doesn't run in class B

on another note if someone expands on the circuit say with a ccs the auto bias circuit would have enough gain in essence to trnsform the final stage into a local AGC keyed VCA and compress the signal.
  Reply With Quote
Old 23rd July 2013, 08:39 PM   #5
diyAudio Member
 
Join Date: Feb 2010
Location: Eastern Ontario CA.
Default DC Restorer

Thanks DavesNotHere The simplest answer is the best starting point!
  Reply With Quote
Old 23rd July 2013, 09:31 PM   #6
diyAudio Member
 
Join Date: Aug 2008
Not exactly DC restorer, which is discussed in details in this thread
Putting Stock In Carver?
but automatic bias control developed back in 1947 and published in Audio Engineering - "High Quality Audio Amplifier with Automatic Bias Control".

Article in PDF format attached.
  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
Hypex SMPS DC Error detection and DC blocking cap bypass MaartenJ Class D 4 7th January 2011 11:58 AM
9v. 350ma.dc. class2 ac-dc wall adapter question crippledchicken Power Supplies 1 26th October 2009 05:39 AM
we can offer power module of DC/DC Converter & AC/DC Adapter auling Vendor's Bazaar 0 12th May 2009 04:48 AM
to convert a 12v dc car adapter to support 19 volts dc shadiedog87 Power Supplies 6 31st October 2007 08:27 PM
Combined PFC AC/DC & DC/DC SMPS ChocoHolic Power Supplies 33 22nd December 2005 11:04 PM


New To Site? Need Help?

All times are GMT. The time now is 09:45 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