Re: Flyback Xfmr

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Kidd6488-at-aol-dot-com>

Hi, I also have a flyback xfrmr that I'd like to use for a JL, or a small TC. 
It is in a enclosed case, and paart of the core sticks out. There are the 
usual two HV Leads on top. On the bottom, there are a total of nine pins. It 
is a circualar setup. On one side, there are three pins, which I think is the 
flyback.  On the other side, there are five wires, with two of them soldered 
together, making it four pins. Away from this "circle", there are two other 
pins, which appear to go up to a circuit board with two knobs: "screen" and 
"focus". This flyback came out of a 25" color TV. 

-- Jonathon Reinhart 






In a message dated 6/23/01 08:13:34 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