Re: gdt

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

Original poster: "gtyler" <gtyler-at-drummond-dot-org.za> 

A good way to do it is use a small ferrite toriod, wind with 5 wires at
the same time. When you are finished connect windings in series to get
the windings with more turns. Turns need to be calculated from
N = VOLTAGE/4 x FLUX DENSITY X FREQUENCY X CORE AREA (IN MM2)

Flux density would be about 0.2 . Filter toriods are not good, you need
a power ferrite like Seimens n27 although n38 will also work. Phillips
3C8 etc. A smaller toriod is actually better, about 14mm works well. Use
grade 3 PI magnet wire unless you need to be able to connect the drive
side to the user interface, then use triple insulated wire for the
primary wire.
     Are you sure that is what you need though, most of mine end up 1 : 1
+1? maybe increasing the primary side supply voltage is easier.

George Tyler

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, July 11, 2004 5:51 AM
Subject: gdt


 > Original poster: "claude masetto" <claudmas-at-optusnet-dot-com.au>
 >
 > Hello,
 > Could someone tell me the best way to wind a GDT with a turns ratio of
1:2:2
 > and still maintain good coupling between primary and secondary. Also,
what
 > seems to be a good number of turns.
 >
 > Thanks
 > Claude.
 >
 >
 >