Fwd: Re: gdt

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

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>


>From: "Eastern Voltage Research Corporation" 
><dhmccauley-at-easternvoltageresearch-dot-com> (by way of Terry Fritz 
><teslalist-at-twfpowerelectronics-dot-com>)
>Subject: Re: gdt
>
>For my 1:2:2 transformers, I do it the following way:
>
>For example, if I want a 10:20:20 turn GDT, i simply wind three strands of
>20 turns and then cut the primary in half and then parallel both
>10 turn primaries.  I can maintain a measure coupling of greather than 0.99
>when I do this.
>
>Just one thing.  Once I have 10 turns on the core, i'll pull some slack on
>the primary winding and twisted maybe 4 inches of that piece outward.  Then
>I continue
>winding the additional 10 turns.  It also helps to put tape on the primary
>to make paralleling easy.  Once you wind it, it may be difficult to
>determine which end is which
>when you start paralleling.
>
>Dan
>
>
> > 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.
> >
> >
> >
> >
> >