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

output transfo problem
output transfo problem
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 10th April 2013, 08:02 AM   #1
Mangekyo24 is offline Mangekyo24  Philippines
diyAudio Member
Join Date: Apr 2013
Default output transfo problem

hello, im new on this forum., i have a question, i have E'I' core with 1" center leg from 3 ampere power transformer that i salvage lately, my plan is to build my own guitar tube amp and plan to rewind and use it as my output transformer. would it be good for it? i have my power tube 2x6L6GC and have 3x12ax7. Spec on 6l6 that i soon to build Typical Operation, Class AB1, Audio Power Amplifier (Values for two tubes)
DC plate voltage 450 V
Screen grid voltage 400 V
Control grid bias voltage -37 V
Peak AF grid-to-grid voltage 70 V
Zero-signal plate current 116 mA
Maximum-signal plate current 210 mA
Zero-signal screen grid current 5.6 mA
Maximum-signal screen current 22 mA
Load Resistance, plate-to-plate 5600 ohms
Total harmonic distortion 1.8 %
Maximum signal power output 55 W..
my problem is how to determine primary turns and awg wire no# for pri and sec. plz help .. thank you very much all if adress some answers on this,good bless all DIYer's and more power tube .
  Reply With Quote
Old 10th April 2013, 08:23 AM   #2
Shoog is online now Shoog
diyAudio Member
Shoog's Avatar
Join Date: Aug 2002
Location: Eire
You can do it, and in a guitar amp application the steep roll off of the top end might not be an issue.

  Reply With Quote
Old 10th April 2013, 11:46 AM   #3
DUG is offline DUG  Canada
diyAudio Member
Join Date: Jan 2003
Location: mississauga ontario canada
The material used for power transformer will have significant power losses at higher frequencies (audio).

Research how big a 55W audio transformer is and compare that with what you have.

Hammond Mfg. - "Classic" Push-Pull - Tube Output Transformers - (1608 - 1620, 1645 & 1650 Series) for starters.

Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  Reply With Quote
Old 12th April 2013, 04:01 AM   #4
Mangekyo24 is offline Mangekyo24  Philippines
diyAudio Member
Join Date: Apr 2013
thanks guys, i found some calculator for that now, hopefully i can work on it. godspeed
  Reply With Quote


output transfo problemHide 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
"Output Transfo + FETs" Amplifier GlidingDutchman Solid State 10 7th April 2009 08:32 PM
low zout vs output transfo jeapel Tubes / Valves 6 6th February 2009 05:10 PM
Help for a Output Transfo problem jogas Tubes / Valves 4 25th May 2005 11:48 PM
does anybody know this transfo? then_dude Tubes / Valves 24 6th July 2004 09:48 PM
Problem with transfo connection arold19 Pass Labs 6 6th March 2003 02:10 PM

New To Site? Need Help?

All times are GMT. The time now is 11:56 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio