Re: Flyback HV terminals (fwd)

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Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 04 Mar 2007 02:25:37 -0500
From: David Speck <dave@xxxxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Flyback HV terminals (fwd)

Chris,

The low end of the secondary is one of the pins around the bottom.  The 
primary windings have very low resistance compared with the secondary, 
so it would be difficult to determine which of the pins is the most 
direct connection to the secondary. 

You may be able to figure out which is the end of the secondary by 
simple inspection, as long as the winding are not potted. 

However, most of the time, experimenters who drive flybacks do not use 
any of the original primary windings, but instead just thread 5-10 new 
turns of 18 Ga wire through the core opening to make a new primary, and 
then just ground one of the bottom pins for the secondary.

Dave
>
> Hello list,
>   I have had a large flyback transformer that has been sittting around in my parts box for a while. I am thinking of putting it to use now as a HV power supply, the only thing left for me to do is to figure out where said HV comes out. =D I see one large insulated wire coming out of the large secondary, however, that seems like the only connection. There are lots of other taps around the secondary, but they all measured the same resistance relative to the large insulated wire. So does anybody know where the other end of the secondary goes? Thanks in advance for the help.
> -Chris