Re: Flyback Xfmr

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Fucian-at-aol-dot-com>

In a message dated 6/23/01 6:44:30 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes: 


>
> Hi all (Sorry I know this is a bit OT) 
>
> I recently pulled apart an old telly to get at the flyback transformer. It 
> is a sony TV transformer with the rectifier and cascade built in. I want to 
> hook it up to a 12V batttery, an FET and a signal generator, but before I do 
> that, I need to know which pins are the primary windings, etc. I actually 
> only want to use 2 pins, (primary winding) because my setup will no employ a 
> feedback loop. I doubt that anyone has a pinout of this flyback (it would be 
> great if they do :) so if possible I want to consider other options: 
>
> 1) Continuity / Resistance. Find the highest resistance pins and connect up 
> the power supply to them 
>
> 2) New winding : Wind a new primary onto the ferrite core, but how many 
> turns? 
>
> 3) Experiment: trry all the different pin combinations 
>
> Pictures are at 
> http://www.geocities-dot-com/teslamanuk/public_html/projects/flyback/flyback.htm 
> and feedbaclk would be very much appreciated!!! 
>
> I really dont wanna fry the flyback of possible, so I want some professional 
> opinion first!!! 
>
> Thanks, 
> Jason 



Hi! I have fiddled with these before.Make a new primary.Just wind on 8-10 
turns.I used a feedback though.These really suck at performance because most 
are designed to work at voltages of around 320volts i believe.It wont do too 
much.The primary is  most likely the one with the smallest resistance.Theres 
no way of telling for sure w/o contacting the manufacturer. 

Matt 

Matt