Output transformers resistance - 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 5th January 2007, 11:42 PM   #1
nhuwar is offline nhuwar  United States
diyAudio Member
 
nhuwar's Avatar
 
Join Date: Jan 2007
Location: Cypress Texas
Question Output transformers resistance

Ok I'm sure this is a easy questions for most of you guys but how do I figuare the
primary resistance needed for a output transformer. Should it be the resistance of the plate load or not. Im looking at 2500 vdc at 317ma. Oh it's not a normal audio tube.

Any help would be greatly appreciated.
  Reply With Quote
Old 6th January 2007, 12:12 AM   #2
diyAudio Member
 
korneluk's Avatar
 
Join Date: Jan 2005
Location: South Florida
I think what you are asking for is how to determine the "impedance" not the "resistance".

For a single ended triode (SET) application, the simple rule of thumb, as a starting point, is to use a primary impedance of 2x (two times) the Rp (tube's plate resistance) at the chosen operating point - you can get this data (either directly or derived from the curves) from the tube data sheet.

For a push-pull (PP) application the impedance should be 4x the plate resistance.

I hope this helps,

-- josť k.
  Reply With Quote
Old 6th January 2007, 02:02 AM   #3
nhuwar is offline nhuwar  United States
diyAudio Member
 
nhuwar's Avatar
 
Join Date: Jan 2007
Location: Cypress Texas
Ya I knew about impedence or Z: but I was being generic anyway's thanks for the info.

Nick
  Reply With Quote
Old 6th January 2007, 02:02 AM   #4
nhuwar is offline nhuwar  United States
diyAudio Member
 
nhuwar's Avatar
 
Join Date: Jan 2007
Location: Cypress Texas
Shut I know double posting is a no no but it's a tetrode not a triode.
  Reply With Quote
Old 10th January 2007, 11:10 AM   #5
Merlinb is offline Merlinb  United Kingdom
diyAudio Member
 
Merlinb's Avatar
 
Join Date: May 2006
Location: Lancashire
Just decide what class you want it to run in and draw a load line:
http://www.freewebs.com/valvewizard1/se.html
  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
I want to make an amp with a Negative Output Resistance, but HOW?? CeramicMan Solid State 28 10th September 2013 06:36 PM
Op amps: output impedance and load resistance mudihan Chip Amps 36 28th October 2012 03:15 PM
Output transformer DC resistance.. jpdesroc Tubes / Valves 6 12th March 2008 09:46 PM
ear 834p output resistance FTSIKIS Tubes / Valves 5 10th May 2007 09:26 AM


New To Site? Need Help?

All times are GMT. The time now is 04:02 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