The Oncore 2000 or similar is a good idea.
The small puck antennas usually dont have any onboard filtering and the 3801
will lose lock if, as in my case I transmit 30W of 1296MHz 40' away
Antennas such as the Oncore 2000 have onboard filtering as they are
intended to be used in rf polluted environments (ie cell sites)and do not
suffer this problem. Since changing to one of these "cone antennas" the
problem has never reoccurred
Dave
ww2r
Message: 1
Date: Sun, 3 Jun 2007 13:49:56 -0400
From: "michael taylor" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Z3801A Antenna
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 6/2/07, Bill Janssen <[EMAIL PROTECTED]> wrote:
> I know this has been discussed recently but am wondering what the
> recommended (cheap but usable )
> antenna would be. I want to give him a recommendation or two. The
> antenna has to be a 5 Volt version
> to match the Z3801A
I actually have been using a el-cheapo generic passive GPS antenna fed
that came with about 10 feet of RG-174 or smaller. With the antenna
placed outside I was able to maintain a GPS lock at least 95% of the
time. Certainly usable while testing or in my case until I get around
to installing my active antenna. The patch antenna useful for initial
testing, as 10 feet is too short for my desired permanent
installation.
QST Oct 2002, "An Inexpensive External GPS Antenna"
<http://www.arrl.org/tis/info/pdf/0210036.pdf>
I ended up purchasing a Oncore 2000 antenna (5V, 25dB) from Ridge
Equipment <http://www.ridgeequipment.com/store/page6.html> that I need
to install still (when there is no risk of thunderstorms).
-Michael, VE3TIX
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