Re: [IRCA] Remote Termination on DKAZ and EWE

[Neil Kazaross <neilkaz58@xxxxxxxxx>]

James,

Assuming that I understand your plans correctly you're planning on using
the pot in the shack with lamp cord running from it to the DKAZ. The
problem here is that the two wire cord will become part of the antenna and
screw up the pattern and null. To do what you plan to do, you need a
transformer at the end of the antenna to start with.

Colin Newell of IRCA is making a selling Vactrol setups for a very fair
price. http://www.dxer.ca/

Perhaps if you ask him, he could make one for you if you want to use your
lamp cord rather than cable to power it.

After installing a Vactrol setup here, made for me by a good DX friend I
feel strongly that this is the way to go for remote control of Rt. My fixed
resistor Rt was set to be very good via much trial and error. However, the
Vactrol is every bit as good as the fixed Rt on all freqs and I can usually
tweak in a few more dB of null on a station and not hurt the null of other
stations. It is also useful to adjust Rt in some cases for improving nulls
of stuff at large angles to the exact back end or to improve nulls high end
or low end.

You won't be able to use this type of setup with a EWE since it is
connected to ground, but there are ways around that. However, I am not a
circuits guy so I am unsure how to do that.

I'd use a Vactrol if you want to remotely vary Rt.   73 KAZ out to test
this setup at night.

On Sat, Mar 19, 2016 at 2:36 PM, James Niven <jniven@xxxxxxxxxxxxx> wrote:

> Hi all,
>
>
>
> A General question...
>
>
>
> I think it's time to try out setting up remote termination on my DKAZ and
> EWE.
>
> I have some lamp cable which I can run the length of my dkaz 140 foot to
> the
> DX shack.
>
>
>
> I thought I picked up 1k pots from radio shack, but I see I have 5k
> instead,
> will a 5K Linear-Taper Pot work or do I need something smaller?
>
> Also, this pot I have has three solder lugs, which lugs do I use to fix the
> wire end on?
>
>
>
> James Niven
>
> Austin, Texas
>
>
>
>
>
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