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Re: Ham shack satellite communications

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From	"Don" <g@crcomp.net>
Newsgroups	sci.electronics.design
Subject	Re: Ham shack satellite communications
Date	Wed, 16 Sep 2026 14:54:20 -0000 (UTC)
Organization	A noiseless patient Spider
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Gerhard Hoffmann <dk4xp@arcor.de> wrote:
> Am 14.09.26 um 17:14 schrieb Don:
>> It seems best to start with the receiver. Here's one simple receiver
>> schematic:
>>
>> eggbeater antenna -> LNA -> LMR 200 -> RTL-SDR -> FreeBSD
>>
>> What's your favorite eggbeater and why?
>>
>> What's your favorite LNA and why?
> For 432 it is this one
> <https://www.flickr.com/photos/137684711@N07/48088857111/in/datetaken/lightbox/>
>
> Why? because I made it to fit my likings.
>
> Selectivity:
> <
> <https://www.flickr.com/photos/137684711@N07/48088857111/in/datetaken/lightbox/>
>
>
> DL7APV (RIP) measured 0.25 dB noise figure, my own 8970B said 0.5 dB.
> The difference could have to do with the bandwidth of the SAW filter
> on 432 MHz vs. the bandwidth of the noise meter, and my 346C noise head
> + Rosenberger attenuator hasn't seen a cal lab for a long time.
>
>
> You might be interested in these email reflectors:
>
> https://groups.io/g/Moon-Net
>
> https://groups.io/g/Amateur-DSN/

Your custom LNA is perfect! It inspires me to make my own LNA, after
my nascent satellite station becomes fully functional for both
transmission and reception. For the time being my strategy is to 
minimize my learning curve.
    It's supposedly possible to run DC over coax to the LNA. But
again, to minimize my learning curve, a separate outdoor DC cable
will be used instead.
    Thank you for sharing the email reflectors. A Deep Space Exploration
Society <https://dses.science/> spokesman also showed up at my 
Divisional ham convention.

Danke,

--
73, Don, WD7Q                                             veritas    _|_
                                                          liberabit   |
https://www.qsl.net/wd7q                                  vos         |

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Thread

Ham shack satellite communications "Don" <g@crcomp.net> - 2026-09-14 15:14 +0000
  Re: Ham shack satellite communications Cóilín Nioclásín Glostéir <thanks-to@Taf.com> - 2026-09-15 20:13 +0000
    Re: Ham shack satellite communications "Don" <g@crcomp.net> - 2026-09-15 21:40 +0000
      Re: Ham shack satellite communications Jan Panteltje <alien@comet.invalid> - 2026-09-16 07:45 +0000
        Re: Ham shack satellite communications "Don" <g@crcomp.net> - 2026-09-16 11:56 +0000
  Re: Ham shack satellite communications Don Y <blockedofcourse@foo.invalid> - 2026-09-16 05:54 -0700
  Re: Ham shack satellite communications Gerhard Hoffmann <dk4xp@arcor.de> - 2026-09-16 15:37 +0200
    Re: Ham shack satellite communications Gerhard Hoffmann <dk4xp@arcor.de> - 2026-09-16 15:42 +0200
    Re: Ham shack satellite communications Jan Panteltje <alien@comet.invalid> - 2026-09-16 14:25 +0000
      Re: Ham shack satellite communications Gerhard Hoffmann <dk4xp@arcor.de> - 2026-09-16 16:56 +0200
        Re: Ham shack satellite communications Jan Panteltje <alien@comet.invalid> - 2026-09-16 17:59 +0000
          Re: Ham shack satellite communications Gerhard Hoffmann <dk4xp@arcor.de> - 2026-09-16 20:17 +0200
      Re: Ham shack satellite communications john larkin <jl@htigct.com> - 2026-09-16 11:31 -0700
        Re: Ham shack satellite communications Gerhard Hoffmann <dk4xp@arcor.de> - 2026-09-16 21:28 +0200
          Re: Ham shack satellite communications "Don" <g@crcomp.net> - 2026-09-16 19:57 +0000
          Re: Ham shack satellite communications john larkin <jl@htigct.com> - 2026-09-16 13:18 -0700
            Re: Ham shack satellite communications Gerhard Hoffmann <dk4xp@arcor.de> - 2026-09-17 00:22 +0200
          Re: Ham shack satellite communications Jan Panteltje <alien@comet.invalid> - 2026-09-17 06:12 +0000
    Re: Ham shack satellite communications "Don" <g@crcomp.net> - 2026-09-16 14:54 +0000

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