[Dstar] VK5REX update
Michael Carey
michaelcarey at internode.on.net
Wed Mar 24 06:30:38 CST 2010
Hi Will,
Yep, you are right. The problem that was shown on the YouTube video was
indeed caused by low level broadband transmitter noise. While the
receive cavities have a notch on the transmit frequency, the transmit
cavities are plain old band pass ones. At the moment, the problem is
"fixed" through the use of two antennas vertically separated.
Eventually, as funds permit I would like to get a nice pass-notch
duplexer for VK5REX B.
Michael.
VK5ZEA
Will wrote:
> Hello Michael,
>
> Watched your Dstar youtube videos and in particular
> the desensing problems you are having with the UHF
> repeater.
>
> With all the receiver isolation it would appear that
> the problem is with transmitter noise. The two cavity
> filters shown, are they notch or band pass...?
>
> Will
> VK6UU
>
>
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