panasonic transformer ID help - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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 3rd July 2009, 04:59 AM   #1
diyAudio Member
Join Date: Dec 2003
Location: Massachusetts
Default panasonic transformer ID help

So I pulled this nice transformer out of an old amplifer years ago and kept it for a nice project. I've pulled it back out and want to use it now, but I can't remember where I put in 120VAC.

I think I've pretty much nailed down the secondary side, there are 3 pegs, the middle one is a center tap. The solid windings are thick for high current.

On the mains side there are 6 pegs. Three of them have thick solid core windings and three are smaller, maybe 18-20AWG?

I'm guessing the three smaller ones are where the 120VAC hooks in, but across them (two outer pins) I read about 3.6 ohms resistance (1.8 ohms per side).
According to ohms law that is 30amps if I connect 120VAC into that, which doesn't seem right?

Do you think this tranny was fed via some current limiting resistors, it seems to be a Panasonic unit, part number "SLT5P291" which comes up on google hits but no schematic.

Any ideas?


P.S. I showed what I think is the secondary in red and the primary in yellow.
Attached Images
File Type: jpg pana_trans.jpg (94.9 KB, 30 views)
  Reply With Quote
Old 3rd July 2009, 02:12 PM   #2
star882 is offline star882  United States
diyAudio Member
star882's Avatar
Join Date: Mar 2007
It appears that the red is the primary. To check, connect it to 120v through a light bulb. The bulb should not light if the connections are correct. Then check the voltages to verify.
"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
  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
WTB Panasonic WM-61A neilyboy84 Swap Meet 4 17th August 2016 06:14 AM
Panasonic EVJ 454Casull Parts 7 1st March 2009 01:06 AM
Panasonic WM-62 or WM-66 instead of WM-61? NickZ Multi-Way 2 20th December 2005 01:02 PM
Panasonic Pot AKSA Parts 2 10th March 2005 09:44 PM
Panasonic FCs jonclancy Parts 8 17th August 2004 07:30 PM

New To Site? Need Help?

All times are GMT. The time now is 09:28 AM.

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