[Dstar] VK5REX update

[Steve Reining]

Hi Micheal

A Notch / Bandpass Diplexer is cheaply acheived by using
a mobile type Notch diplexer and a seperate single band pass cavity
on the Tx and RX
I can supply one of these setups for about $100.00
Ideal for any 70cm Repeater
Regards Steve VK3UJ

At 07:00 AM 24/03/2010, you wrote:
>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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Steve Reining VK3UJ
VK3RHF System Owner Operator
29.640/29.540
53.625/52.625
438.750/433.750  enc 88.5Hz
1273.400/1293.400
4 Way Repeater System
http://www.vk3rhf.net [VK3RHF WEB PAGE]
PO Box 1079
Huntingdale, Victoria
Australia 3166
Mobile 0428 100268
sreining at bigpond.net.au
Western Communications (vic)