Go Back   Home > Forums > >

Tony's latest traffo DIY build
Tony's latest traffo DIY build
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
Old 19th March 2021, 09:43 AM   #1041
TonyTecson is offline TonyTecson  Philippines
diyAudio Moderator Emeritus
TonyTecson's Avatar
Join Date: May 2003
Location: Maybunga, Pasig City
Originally Posted by Kay Pirinha View Post
Wow, those are monster C cores! What power capability would your estimate at 50Hz grids?
Best regards!
this was from an isolation traffo rated for 1000watts/50 hz...300 watts at 30 hz is a reasonable expectation imho...
  Reply With Quote
Old 23rd March 2021, 01:36 PM   #1042
gorgon53 is offline gorgon53  Finland
diyAudio Member
Join Date: Nov 2006
Location: Finland
360VA if you can squeeze in the same amount of copper and can liv with the distortion at maxed out induction.
I use 0.5T at 50Hz for lowest distortion (distortion increases at higher induction, starting from 0.4T, inductance reaches a max somewhere between 0.8 and 1.2T), this would give at most 80W output but it all depends on what you need or want want. In the old days 0.4-0.6T at 40Hz (allowing maxed out inductance at 20Hz) was considered best for minimum distortion with 3%Si Goss (McIntosh squeezed out a bit more, 75W with only 4kg of iron, but that is because the high amount of fb allowed for a bit higher transformer distortion)

Last edited by gorgon53; 23rd March 2021 at 01:46 PM.
  Reply With Quote
Old 24th March 2021, 12:40 AM   #1043
TonyTecson is offline TonyTecson  Philippines
diyAudio Moderator Emeritus
TonyTecson's Avatar
Join Date: May 2003
Location: Maybunga, Pasig City
those were 6kg a piece ....thanks gorgon53
  Reply With Quote
Old 12th June 2021, 08:45 AM   #1044
mariogert is offline mariogert  Netherlands
diyAudio Member
Join Date: Jun 2006
Originally Posted by TonyTecson View Post
this is a power traffo using a 2inch center leg stacked to 3 1/4 inch DEECO silicon steel (noss) irons..
specs are as follows:
primary: 220 volts 60hz.
secondary1: 250volts at 2amps.
secondary2: 100volts at 0.5amps
secondary3: 12.6volts at 10 amps
secondary5&6: 6.3 volts at 3 amps

completed, there are 3 chokes sitting on top, 1/2inch, 5/8 inch, aqnd 3/4 inch.

testing prior to dipping in polyuretahne varnish

line voltage:

magnetizing current:

unloaded core apparent power:

actual unloaded power in watts:

power factor:
Dear Tony,
I have a tube preamp thet wants 120V and 12V power supply fom 230V AC EU mains power.
Would it be possible for you to make me a transformer with dual 120V and 12V outputs like the one here? Please quote in PM.

Mario G Rouwenhorst
  Reply to this post


Tony's latest traffo DIY buildHide this!Advertise here!
Thread Tools

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
tony's 6LU8 push-pull power amp build TonyTecson Tubes / Valves 31 7th April 2018 02:56 AM
My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111 LinuksGuru Tubes / Valves 2 4th October 2017 01:03 AM
Trinium, my latest build Mark.Clappers Multi-Way 18 17th July 2012 07:07 PM
My latest CHR-70 build tresch Full Range 8 6th December 2011 12:34 AM
My latest build SS 23W smithy666 Subwoofers 6 14th April 2009 11:50 AM

New To Site? Need Help?

All times are GMT. The time now is 11:57 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio