[amsat-bb] A satellite transponder is a shared resource

[Mike Sprenger]

You're spot on Bob,

I intended to stir some good ham radio memories !

Thanks,
Mike

Sent from my iPhone

> On Dec 10, 2016, at 9:48 PM, Bob- W7LRD <w7lrd at comcast.net> wrote:
> 
> good times indeed on AO-40 I had more fun than a human being is supposed to have (sobsob)
> 73 Bob W7LRD
> 
> From: "Mike Sprenger" <mikesprenger at gmail.com>
> To: "Zach Metzinger" <zmetzing at pobox.com>
> Cc: "amsat-bb" <amsat-bb at amsat.org>
> Sent: Saturday, December 10, 2016 5:04:59 PM
> Subject: Re: [amsat-bb] A satellite transponder is a shared resource
> 
> On AO40 Leila would definitely tell you if you were too hot on the uplink.  But, it wasn't unreasonable...good times.  
> 
> Oh....to think about squint angle (of the directional satellite antenna pointed at your location vs your receiving antenna.   Good times they were
> 
> Thanks,
> Mike
> 
> Sent from my iPhone
> 
> > On Dec 10, 2016, at 2:10 PM, Zach Metzinger <zmetzing at pobox.com> wrote:
> > 
> >> On 12/10/16 12:47, Clayton Coleman wrote:
> >> Often there are portable stations running 5 watts with their Arrow
> >> antennas. Please, please reduce your CW power. If you are operating CW
> >> to overcome hearing deficiencies at your station,please consider
> >> making station improvements rather than taking more of the
> >> transponder's limited power for yourself.
> > 
> > This is a great example of where a digitally processed (DSP/SDR) transponder would excel.
> > 
> > Assuming that any one uplink signal didn't crush a sensitive receiver/ADC with good dynamic range, it could process all signals in the pass-band and AGC the problematic ones before sending the signal back to an output DAC/filter/PA.
> > 
> > I never AO-40, so I haven't experienced LEILA in action, but the idea would be similar. "Quieting the alligators"
> > 
> > --- Zach
> > N0ZGO
> > 
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