[Dstar] Antenna upgrade at VK5REX B
Michael Carey
michaelcarey at internode.on.net
Sun Nov 29 11:42:44 CST 2009
Hi Everybody,
This morning (29th Nov) at 0900 a brand new RFI Folded Dipole antenna
was installed on top of the tower at the VK5REX B D-Star repeater site.
I was able to utilize a rigging company that was in town on another job
which saved me any travel costs. The riggers were delayed a few days
because of the inclement weather and were more than happy to help me out
before heading back to Adelaide. The two guys who climbed the tower had
it done within an hour. The existing ex-Austar MDS cable was used and
the antenna plugged directly into a 7/8" EIA flange to N type adapter.
Because of the ongoing isolation issues with the current duplexer, I am
currently running VK5REX B on a two antenna setup. The existing antenna
is now the transmit antenna, and the new antenna on the top of the tower
is used for receive.
Initial on-air (non scientific) tests show a marked improvement on
receive performance. I can use low power on my IC-91AD radio from
anywhere inside my house where as before, I would have trouble even
using high power. In coming weeks I will be performing DX receive tests
to see how VK5REX B is now performing.
You can't imagine how big my smile is!!
Michael.
VK5ZEA
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