Parafeeding an EL84 SE(T) - 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 28th February 2011, 06:53 PM   #1
diyAudio Member
 
rvrazvan's Avatar
 
Join Date: Jul 2010
Default Parafeeding an EL84 SE(T)

I'm not happy with the ideea of air gapped limited response low power output transformers. And my budget is not allowing for more right now. I've been reading about parafeed output but the information is not to abundent so i need some tips.
I've read that the transformer should be rated at 5 X output power. What about the chokes?


ALSO. I've seen a schematic where a toroidal power transformer with 12-0-12v or something close to that was used in a SE schematic. one section was used for the output from the amplifier and the other one was used to cancel the magnetic field thus avoiding parafeeding or big expensive output transformers.
  Reply With Quote
Old 28th February 2011, 06:59 PM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I don't have any answers to your questions, but i have a pair of RH84 monobloks here that are parafeed and work well. We used vinatge Grundig iron (1 console/monoblok) with 1 OPT as the OPT and the other's primary for the parafeed choke.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 28th February 2011, 07:31 PM   #3
diyAudio Member
 
rvrazvan's Avatar
 
Join Date: Jul 2010
2A3 SE parafeed with PP-transformer
  Reply With Quote
Old 1st March 2011, 03:09 PM   #4
diyAudio Member
 
rvrazvan's Avatar
 
Join Date: Jul 2010
Bump. Need help on the schematic
  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
5W EL84 drive EL84 SE Audio_idiot Tubes / Valves 31 31st May 2012 08:38 PM
My EL84 SE jerluwoo Tubes / Valves 20 22nd August 2008 02:07 PM
SE EL84 question phn Tubes / Valves 8 12th March 2007 07:51 PM
Cheap SE EL84 DocLorren Tubes / Valves 8 13th September 2005 03:18 PM
SE el84 takashi Tubes / Valves 10 29th June 2004 01:34 PM


New To Site? Need Help?

All times are GMT. The time now is 10:58 PM.


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