[amsat-bb] Re: Redundant geostaionary birds?

[Karl Bullock]

Thanks, Dave.  Nothing ventured, nothing gained, eh?

73,
Karl, WA5TMC

Dave hartzell wrote:
> Hi Ed,
>
> You're right, the thread is going nowhere, other than to satisfy some
> intellectual curiosity.  That was established early on in the thread.
>
> Why not explore potential systems and alternatives, even if they are a dead-end?
>
> Thanks for contributing!  ;-)
>
> 73,
>
> Dave
>
> On 1/30/07, Edward R. Cole <al7eb at acsalaska.net> wrote:
>   
>> Dave and all:
>>
>> I wonder what all of you were thinking?  If a commercial communication
>> satellite were channeled on one of our mw ham bands, then we would be
>> booted off.
>>
>> C-band satellites used approx. 37-MHz wide channels with alternating linear
>> polarity to afford more adjacent channel isolation.  On most of the TVRO
>> units one could manually adjust polarization angle for optimizing the
>> signal.  If you adjusted 90-degrees off then one often got a ghost of one
>> of the adjacent channels.  The feedhorns had a rotating probe with the
>> motor on the backside of the feedhorn.
>>
>> Typically in the mid-1980's these TV sats cost over $100M before launch.
>> Your not going to convince the satellite company to include ham radio in
>> any manner.
>> AS has been hashed out many times previous on this reflector the path loss
>> to the Clarke Belt orbit is prohibitive.
>>
>> This topic is going no-where!
>>
>> 73, Ed - KL7UW
>>
>>     
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