SE UL OT - primary wired in reverse - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 29th May 2004, 04:10 PM   #1
benny is offline benny  Australia
diyAudio Member
benny's Avatar
Join Date: May 2004
Location: Melbourne, Australia
Send a message via MSN to benny
Default SE UL OT - primary wired in reverse

hi all,

i want to design a SE amp with different tube types in the output stage.

because i'm a 17 year old high school kid, money's not something i'm going to claim to have a lot of... so custom tranny winds is out of the quesion for me, unless for a really good price... so what i was thinking, was in a SE UL tranny, is it alright to wire the primary in reverse, so the 40% UL tap becomes a 60% tap??? or is there a certain way the tranny is wound and so it is best to use it this way? will this change the reflected impedance (in a multi-tap secondary this is) becuase it changes the magnetic orientation, or something, and therefore will mean say, in a tranny with a 16,8,4 ohm taps, we still get 16 ohm as the value to use on 16 ohm tap for correct reflected imp, but the 8 and 4 ohm taps are now different????

i wanted to know this, because for example, in a tranny with a 5k primary, using the 40% tap will only be a 800ohm primary, which is pretty much unusable... well, ok, it's useable, especially with a number of tubes in parallel, but it's not practical for what i want... and anyway, you don't want to go paralleling a lot of tubes in a SE amp anyway.. it's just false economy.

On the other hand though, if put in reverse, then the 40% tap becaome 60%, and this gives a 1800ohm primary, which is useable.

thanks, any help apreciated.
  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
Ill be getting wired here now... phluffy Introductions 2 4th May 2009 03:42 PM
FS: Squeezebox 2 (wired) loddie Swap Meet 0 8th January 2008 03:22 AM
is this wired right? shooto Instruments and Amps 1 17th July 2006 02:47 AM
what size amp for DPL 12 wired for 4 ohm? crippledchicken Subwoofers 7 19th January 2005 11:10 PM
Wired Remote Control sma Everything Else 0 13th December 2003 03:48 AM

New To Site? Need Help?

All times are GMT. The time now is 09:01 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2