If I have a Beverage "hub" from which I want to run several of them, is
there any reason not to do the switching on the antenna side of the
matching unit, rather than on the coax side? Could save some
complexity, a couple of matching transformers at least.
--
73, Pete N4ZR
The World Contest
Pete, here is my take on switching Beverages, It is a lot harder to make
a switch with very good isolation at 500 ohms than it is at 50 or 75 ohms.
You need very good isolation between connections so that your 20 to 30
dB notches are not destroyed by leakage from another antenna. What you
sa
ZL3IX wrote:
> As long as your relays have decent isolation, even for high impedances,
it may even be better to switch the Bev wires themselves. That way you
don't share the ground at the feed end, and avoid any common impedance
coupling.
I agree. I've done this since installing my fi
Hello all,
Awhile back there was some discussion about switching Beverages. When I was
back in
Illinois, I had three bi-directional Beverages and I assembled my own circuitry
for
switching between antennas and directions. Being an industrial electrician, for
me the
project was rather straight-
Hi Pete,
As long as your relays have decent isolation, even for high impedances,
it may even be better to switch the Bev wires themselves. That way you
don't share the ground at the feed end, and avoid any common impedance
coupling.
73, Greg, ZL3IX
On 2011-02-02 11:29, Pete Smith wrote:
> If
working very well
73,
Jorge
CX6VM/CW5W
-Mensaje original-
De: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
En nombre de Lee K7TJR
Enviado el: Miércoles, 02 de Febrero de 2011 12:42 a.m.
Para: Topband@contesting.com
Asunto: Topband: Switching Beverages
Pete, here
Thanks to everyone who responded. Lee's answer seems representative of
the bulk of the mail I received. Back to coax switching!
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebea
inter I'll have until May before anything
gets installed.
Carl
KM1H
- Original Message -
From: "Pete Smith"
To:
Sent: Wednesday, February 02, 2011 7:30 AM
Subject: Re: Topband: Switching Beverages
> Thanks to everyone who responded. Lee's answer seems represe
On 02/02/2011 11:20 AM, ZR wrote:
> Im currently using a pair of Ameritron RCS 4's and their isolation is
> horrible as designed. Im working on my own design using cheap 1 GHz relays
> with 70dB of isolation at HF.
You got my attention there. I want to build a K9AY array
and maybe a 2-wire bevera
KM1H
- Original Message -
From: "Rik van Riel"
To:
Sent: Wednesday, February 02, 2011 6:20 PM
Subject: Re: Topband: Switching Beverages
> On 02/02/2011 11:20 AM, ZR wrote:
>> Im currently using a pair of Ameritron RCS 4's and their isolation is
>> horrible
I use an RCS-4 but I replaced the remote antenna switch box with my own using
$1.25 relays from Allelectronics. The remote box is a small plastic one also
from Allelectronics. The isolation is super with the small DIP relays. With the
addition of another relay at the controller, it is easy to
19:09:14 -0500
> Subject: Re: Topband: Switching Beverages
>
> I picked up 2 dozen 24VDC DIP style at a local hamfest after running home
> with one and testing isolation. They were $1 each.
>
> Look in Mouser, DigiKey, Allied and other catalogs to find model # and specs
> from Omro
12 matches
Mail list logo
