[amsat-bb] Arrow Antenna
Mvivona at yahoo.com
Tue Oct 13 13:13:36 UTC 2015
My experience with the duplexer is:
I looked at my Arrow on my antenna analyzer without the duplexer. After some tuning I got a pretty good dip at 146 and 436 MHz.
With the duplexer attached the tuning went way off. I tried, but couldn't even get it close with it installed.
I use mine with my ICom 910. One coax per band. The antenna is on a sturdy camera tripod with two Arrow dualband yagis. I have each antenna connected to a small BNC coax switch so I can remotely switch polarization as needed. At the antenna there is a preamp for each band with power for the preamps being fed through the coax.
For a rotor I simply use a large RC robot style geared servo for AZ being that this is just a temporary out the back door setup. For EL I just walk out and set the EL on the tripod before the bird comes over.
With this setup I usually use about 5 to 10 watts on VHF depending on the bird and elevation. On UHF I sometimes need a little more power due to the attenuation in the coax which is about 50 ft long.
Sent from my iPad
On Oct 13, 2015, at 7:54 AM, Steve Kristoff <skristof at etczone.net> wrote:
I ordered my Arrow Antenna without the duplexer, so I've always used it with two separate coaxes and two radios. I use a simple digital recorder to record the QSOs. My experience, so far, is limited to SO-50, but the set-up works just fine for that satellite.
----- Original Message ----- From: "W3MAT ." <w3mat03 at gmail.com>
To: "AMSAT-BB" <amsat-bb at amsat.org>
Sent: Tuesday, October 13, 2015 1:23 AM
Subject: [amsat-bb] Arrow Antenna
> Has anyone removed the duplexer and its coax and replaced it with one coax
> cable to VHF, and one coax cable to UHF for two radio operation? If so,
> did you notice any improvement and what would the power rating be now
> without the duplexer?
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