RE: [amsat-bb] Interference on AO-51

["Ransom, Kenneth G. \(JSC-OC\)[BAR]" <kenneth.g.ransom@xxxxxxxx>]

Storage space, up mass costs and certification requirements are a few of
the challenges.


Kenneth - N5VHO

-----Original Message-----
From: owner-AMSAT-BB@amsat.org [mailto:owner-AMSAT-BB@amsat.org] On
Behalf Of Tim Tuck
Sent: Thursday, May 04, 2006 6:42 PM
To: amsat-bb@amsat.org
Subject: Re: [amsat-bb] Interference on AO-51

Robert Bruninga wrote:
>>>> "Phil Paulhus" <ppaulhus@verizon.net> 05/04/06 10:47 AM >>>
>> I thing Bob's ideas are right on target.  Using 2 meters for both the

>> up and down links would open the door ...
> 
> Ah, but that is the problem.  We cannot have the uplinks and downlinks

> in the same band.  That is the current problem on ISS.  Because they 
> use 2m for both up and downlinks for school contacts, no other system 
> can use 2m at the same time becuase it will either be jammed when the 
> ARISS system transmits, or it will jam ARISS when it transmits.

Umm... I may be missing something here but cant we use some nice
cavities or helical filters  just like we do in normal repeaters to
reduce or eliminate this problem ?


regards

Tim

-- 

Tim.Tuck@penrith.net, VK2XTT@penrith.net VK2XTT :: QF56if :: BMARC ::
AMSAT#35732