Re: LF: Re: Re: TIL QRO for EU sunrise...

[Scott Tilley <sthed475@telus.net>]

Hi Nic

8 FETs in 4 push pull modules combined with a 4 port Wilkinson combiner. 
Combiner provides LPFing.  SWR protection is included on the output. 

See: http://imagenisp.ca/jsm/VA7LF.html

It has two settings:
STUNT - 1200W
KILL - 2400W

and a little known possibility for a third setting but you really must 
be mad to suggest I try it.  I have about double the PSU capability of 
what it needs but not the courage to try...
I use a supplementary 400W amp to 'quantify' the antenna match then 
switch in the big amp.  Just makes the switching requirements easier and 
safer for the system as a whole.
73 Scott

Nick Mclean (SYD) wrote:
> What design is your PA?
> 73's
> Nic McLean
> VK2KXN / VK5ZAT
>
>   
> > > 1200W out and the rain is sizzling on the coil...
> > >
> > > silly boy...won't you ever learn?
> > >
> > >       
> > Natural coil cooling.... friendly to the enviroment, efficient and
> >     
> free.
>   
> > Hmmm.
> >
> > J. 
> >
> >
> >
> >     
>
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