Center Tapped Mains Transformer as Parafeed Plate Choke - 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
Thread Tools Search this Thread
Old Today, 07:07 AM   #1
diyAudio Member
Join Date: Nov 2013
Default Center Tapped Mains Transformer as Parafeed Plate Choke

Just out of curiosity, would the attached schematic work? Perhaps channel separation would be poor?

As the plate DC currents flow on opposite direction on the primary, they cancel the magnetic flux. There should be no core saturation and inductance would remain high.

Perhaps high enough VA rating is required to get the primary inductance for decent bass? How high? Assume say 5K:8 OPT.
Attached Images
File Type: jpg parafeedse.jpg (209.4 KB, 18 views)
  Reply With Quote
Old Today, 07:44 AM   #2
diyAudio Member
Shoog's Avatar
Join Date: Aug 2002
Location: Eire
It could work but the mains transformer will have fairly low inductance. You really want your plate choke to have high inductance since the OT and choke effectively have their inductances in parallel which like resistance lowers their value at the critical bass frequencies.
I once used a Microwave Oven Transformer as a plate choke but it produced some nasty phase shifts in the bass area. You should expect the same with your proposal.

  Reply With Quote
Old Today, 08:47 AM   #3
DF96 is online now DF96  England
diyAudio Member
Join Date: May 2007
I would expect very poor channel separation. How poor would depend on transformer inductance.
  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
Center tapped transformer help Buzzy Parts 2 8th August 2008 09:35 AM
parafeed plate choke calculation alexg Tubes / Valves 3 15th November 2007 04:12 PM
center tapped choke inverter alexg Tubes / Valves 48 8th July 2007 11:45 PM
Center tapped choke loading Bandersnatch Tubes / Valves 10 8th July 2003 11:56 AM

New To Site? Need Help?

All times are GMT. The time now is 09:14 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2