[Fwd: LF: Re: PA components]

[André Kesteloot]

André Kesteloot wrote:

> These guys are into serious power levels...
> Andre N4ICK
>
> Jenny wrote:
>
> > > One of the problems I encounterd when building my 136kHz PA was to find
> > the
> > > proper capasitors and inductor materials. Even for relative low power (50
> >
> > > Watt) this seems critical.
> >
> > You can get the 3C85 material in 58mm dia toroids from Electronic Services,
> > tel. 01279 626 777. They do credit card orders for amounts greater than 25
> > pounds sterling. The cores are part no. 420605G and cost 6.2 pounds
> > sterling plus delivery and tax each. These are the cores recommended by
> > G0MRF in his PA article in the LF source book. I've just got some and will
> > see how much they can take!
> > I am presently using a junk-box huge green ferrite toroid in the PA and
> > have pushed 900W of RF through it, but it does get hot at that level! It's
> > happy at 600W and the Cirkit core mentioned in my article is good to 500W.
> >
> > http://www/picks/force9.co.uk/136.htm
> >
> > I need over a kilowatt for my one watt erp so I may need some cooling fans!
> >
> > 73 all, Dave G3YXM