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

["Nigel A. Gunn G8IFF/KC8NHF" <nigel@xxxxxxxxx>]

Yes but most cavity filters are bigger than your average amateur satellite.

Tim Tuck wrote:
> 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
>
>   


-- 
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. 59 Beadlemead, Milton Keynes, MK6 4HF, England. 
Tel +44 (0)1908 604004       mobile +44 (0)7765 471661
e-mail nigel@ngunn.net             www  http://www.ngunn.net 
Amateur radio stations  G8IFF, KC8NHF
Member of  ARRL, GQRP Club, QRPARCI, SOC #548,  Flying Pig #385,
           Dayton ARA #2128, AMSAT-NA  LM-1691,  MKARS,  RAYNET
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>