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Re: AO-40 Satellite RF Architecture Question



If AO-40's design is not classified or proprietary, maybe we could build 
linear transponder
clones to supplement the antiquated FM repeaters in the V/UHF bands.
Constructive flames accepted...

Joe Leikhim wrote:

>1. Why is AO-40's transponder described as having receivers and
>transmitters when nothing is apparently demodulated? There is an IF to
>which I would assume downconvertors and upconvertors are interfaced like
>any other bent pipe transponder..
>
>2. Why do I see little discussion of the HELAPS (sp?) power amplifiers?
>What are these? Are they an Envelope Elimination and Restoration
>technique? How does HELAPS work?
>
>3. Did HELAPS achieve the efficiency and linearity required for the
>mission? Would HELAPS be used on a new mission like "JJ"?
>
>--
>Joe Leikhim K4SAT
>Jleikhim@nettally.com
>
>Sky King, Sky King, do not answer.
>
>"The Revolution will NOT be televised" -Gil Scott Heron
>
>
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>
>
>


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