Re[2]: GDT

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Alexander Turkin" <alex_3@xxxxxxx>

It's outer diameter is 2cm, inner diameter 1cm. I don't know the material 
but the seller said it will work up to 500 kHz.
Will such one do the job? It seems too small to me...




-----Original Message-----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Date: Mon, 09 May 2005 17:47:38 -0600
Subject: Re: GDT

> Original poster: Finn Hammer <f-h@xxxx>
>
> Alexander.
>
> "Quite small" does not offer much destription to the majority of us. we
> need Inside dia. outside dia. length. (or width, if you prefer that
> orientation.)  Material would be nice.
> For the gate transformers that I have made, I used 5 lengths of 0.35mm
> magnet wire twisted together. I cannot see why not going down to 0.2mm wire
> driving up to 40N60`s.
> 1 wire is used for the primary, the 4 others are secondary`s.
> I twisted them using a hand drilling machine with a hook in the chuck. the
> wires were in a 1.5meter long 2and a half loop at that time, with the loose
> end and 2 loop ends chucked in a vice, the other 2 loop ends passing around
> the hook. Rotating the hook makes a very satisfyingly look on the twisted
> wires. They twist nice and even that way.
>
> Jan Wagner already layd down the basics of inductance needed for the
> relevant frequencies, check his site for relevant reading. GDT core size is
> one reason to keep the res.freq. uppish.
>
> Cheers, Finn Hammer
>
> Tesla list wrote:
>
> >Original poster: "Alexander Turkin" <alex_3@xxxxxxx>
> >
> >Hello all!
> >
> >  I've got a ferrite (for a Gate Drive Transformer) but it's quite small.
> > So I have to use a thin wire. My question is: what wire can I use in it?
> > I mean how thin it can be? What currents are present there?
> >  Can I make the number of turns less (for example, 10 turns primary and
> > 10 turns each secondary)? What will change?
> >
> >Alex
>