Re: [IRCA] DKAZ questions

[Neil Kazaross <neilkaz58@xxxxxxxxx>]

Agreed about a Vactrol to control and to be able to vary Rt (termination
resistance). My guess would be that 940 ohms is a bit high unless your
wires are quite thin. It is also very tedious and you can never be sure
when varying Rt manually. A Vactrol makes this job much easier and while a
different Rt can be best for different parts of the band (doesn't vary that
much) it is also useful to get a better null on some stations off to the
side.

Most likely when you switch to a Vactrol your overall back null if you
compare across the band will likely end up a couple of dB better as mine
have.  73 KAZ

On Thu, Oct 6, 2016 at 5:30 PM, R. Colin Newell <coffeecanuck@xxxxxxxxx>
wrote:

> Get the Wellbrook FLG 100 and put that HEAD Amp at the antenna - less
> noise!
>
> Also consider a VACTROL for your antenna - details at DXer.ca
>
> On Thu, Oct 6, 2016 at 2:29 PM, Mark Pettifor <mark@xxxxxxxxxxxxxx> wrote:
>
> > For those of you who have DKAZ antennas, which preamp do you use? Do you
> > find it makes much difference whether you put it at the antenna or in the
> > shack?
> >
> > I need to "finish" construction on mine. Right now, I have two 470-ohm
> > resistors alligator-clipped together for the null end, and a hand-wound
> > transformer (my first ever) on a core made of unknown material, to go
> from
> > 940 to 50 into a 50-ohm feedline.... RG-8X, 150 feet. That is also
> > alligator-clipped together. It was for testing, ya know?  :^)
> >
> >
> --
> Colin Newell - Editor and creator *of *Coffeecrew.com
> <http://www.Coffeecrew.com> and DXer.ca <http://www.DXer.ca> -
> VA7WWV | Twitter @CoffeeCrew | Victoria - Canada
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