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Groups > sci.electronics.design > #747822
| From | john larkin <jl@htigct.com> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Ham shack satellite communications |
| Date | 2026-09-16 11:31 -0700 |
| Organization | A noiseless patient Spider |
| Message-ID | <31olallgb3fuskvtji77dn64jolu7efsof@4ax.com> (permalink) |
| References | <20260914a@crcomp.net> <118e621$a3qb$1@solani.org> <118e8sv$3f367$1@dont-email.me> |
On Wed, 16 Sep 2026 14:25:34 GMT, Jan Panteltje <alien@comet.invalid> wrote: >>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 220 -> 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/ >> >> >>73, Gerhard DK4XP > >I have this for 2.4 GHz: > https://panteltje.nl/pub/spectrian_2.4-GHz_linear_top_view_IMG_4576.JPG > >Low power driver: > https://panteltje.nl/pub/1W_PA_400_to_2700MHz_PCB_view_IXIMG_0051.JPG > >And a bunch of Yagi antennas: > https://panteltje.nl/panteltje/raspberry_pi_satellite_tracker/yagi_2.4GHz_25dB_IMG_3984.JPG > Controlled by some RC servos but not in use atm: > https://panteltje.nl/panteltje/raspberry_pi_satellite_tracker/ > >Just experiments... > >A lot more stuff, not really active on ham RF atm. > >What also makes a very good receive antanna are the old TV antenna racks: > https://www.asat.nl/outdoor-antenna-12-5-db > TRIAX DIGI Grid UHF antenna (LTE 700) > The antenna is designed to receive a ground -based digital TV broadcast in > the frequency range 470 ... 694 MHz (channels 21-48). >Good screening from the back, used it for many years for many different things. > https://www.dropbox.com/scl/fi/ekj2c70spwogmwuo63u5q/MoonBounce.JPG?rlkey=taobwn5osfptklqmyil8kytma&raw=1
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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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