 | SDR (Software Defined Radio) | 533 Members |
| RTL-SDR, Amateur, Digital Signal Processing, programming, embedded systems, hardware, circuit, raspberryPi, and much more... | 51 Servers |
| SDR (Software Defined Radio) | 533 Members |
| RTL-SDR, Amateur, Digital Signal Processing, programming, embedded systems, hardware, circuit, raspberryPi, and much more... | 51 Servers |
| Sender | Message | Time |
|---|---|---|
| 26 Nov 2024 | ||
 @tom_show:matrix.org left the room. | 15:20:41 | |
 Thomas joined the room. | 17:17:16 | |
| 27 Nov 2024 | ||
 readerman joined the room. | 07:54:11 | |
| 28 Nov 2024 | ||
 Coelacanthus changed their profile picture. | 21:08:06 | |
 @ixlun:matrix.org joined the room. | 22:32:49 | |
| @ixlun:matrix.org left the room. | 22:34:36 | |
| 29 Nov 2024 | ||
 cat joined the room. | 05:28:44 | |
| cat | Hello. I just bought my first sdr dongle (didnt even arrive yet) and am looking into low-cost portable dish antennas. My primary usecases are scanning for 868Mhz sources (meshtastic/loras in general) and recieving images from noaa/iss. My first idea was to use a reflex umbrella for studio photography as a reflector and something like helical/yagi or quadrofiliar helicoidal antenna . Now ive found this model: https://www.printables.com/model/967903-hexdish-signalboost-amplify-your-phone-signal-outd/ Imo with some modifications it should make an ok-ish dish. What do you think? What would be your solution? | 06:11:47 |
| cat | * Hello. I just bought my first sdr dongle (didnt even arrive yet) and am looking into low-cost portable dish antennas. My primary usecases are scanning for 868Mhz sources (meshtastic/loras in general) and recieving images from noaa/iss. My first idea was to use a reflex umbrella for studio photography as a reflector and something like helical/yagi or quadrofiliar helicoidal antenna . Now ive found this model: https://www.printables.com/model/967903-hexdish-signalboost-amplify-your-phone-signal-outd/ Imo with some modifications it should make an ok-ish dish. What do you think? What would be your solution? Also, would a normal dipole work good enough as a feed? | 06:16:34 |
| cat | * Hello. I just bought my first sdr dongle (didnt even arrive yet) and am looking into low-cost portable dish antennas. My primary usecases are scanning for 868Mhz sources (meshtastic/loras in general), recieving images from noaa/iss and maybe some Hydrogen Line astronomy . My first idea was to use a reflex umbrella for studio photography as a reflector and something like helical/yagi or quadrofiliar helicoidal antenna . Now ive found this model: https://www.printables.com/model/967903-hexdish-signalboost-amplify-your-phone-signal-outd/ Imo with some modifications it should make an ok-ish dish. What do you think? What would be your solution? Also, would a normal dipole work good enough as a feed? | 06:33:05 |
| cat | * Hello. I just bought my first sdr dongle (didnt even arrive yet) and am looking into low-cost portable dish antennas. My primary usecases are scanning for 868Mhz sources (meshtastic/loras in general), recieving images from noaa/iss and maybe some Hydrogen Line astronomy (i dont think it woild be possible with that kind of jank though). My first idea was to use a reflex umbrella for studio photography as a reflector and something like helical/yagi or quadrofiliar helicoidal antenna . Now ive found this model: https://www.printables.com/model/967903-hexdish-signalboost-amplify-your-phone-signal-outd/ Imo with some modifications it should make an ok-ish dish. What do you think? What would be your solution? Also, would a normal dipole work good enough as a feed? | 06:35:21 |
 Freemor | In reply to@nannk:synapse.nannk.xyzFor NOAA/ISS you don't need a dish, however a good wideband LNA is a real plus. The LNA would probably help a lot forthe 868Mhz sources. I do a ton of stuff with my SDR + Wideband LNA + discone antenna including getting very nice images From NOAA/Meteor sats, SSTV from the ISS, listening to local Public safety net (P25 @ 770MHZ). In fact a dish might hanper NOAA/Meteor/ISS and dishes are VERY directional so then you'd need to worry about tracking the satellites as they pass over head. Where as with a Discone or V-Dipole no tracking is required. | 11:15:33 |
| Freemor | * For NOAA/ISS you don't need a dish, however a good wideband LNA is a real plus. The LNA would probably help a lot forthe 868Mhz sources. I do a ton of stuff with my SDR + Wideband LNA + discone antenna including getting very nice images From NOAA/Meteor sats, SSTV from the ISS, listening to local Public safety net (P25 @ 770MHZ). In fact a dish might hamper NOAA/Meteor/ISS as dishes are VERY directional so then you'd need to worry about tracking the satellites as they pass over head. Where as with a Discone or V-Dipole no tracking is required. | 11:16:37 |
 Eris | This could also prove useful: https://www.nooelec.com/store/sdr/sdr-addons/sawbird/sawbird-plus-noaa-308.html | 11:39:30 |
| Eris | They also have: https://www.nooelec.com/store/sawbird-h1.html | 11:41:31 |
 takipsizad joined the room. | 13:56:28 | |
| takipsizad | wanna ask a question does anybody know how this performs? | 14:57:28 |
| takipsizad |  Download 1732892222301.jpg | 14:57:28 |
| cat | In reply to @haileris:dreamless.oneThank you, Ill check what i can do without additional hardware first. | 15:02:59 |
 fredy | In reply to @takipsizad:matrix.orgThis is an old version and one of the first dongles used for sdr, it will work but it may be affected a lot from temperature. Depending on what do you want to do it could be ok. | 15:24:58 |
| takipsizad | mhm it just seems to be the least pain to get so that's why I asked (idk about its frequency range either so) | 15:55:46 |
| takipsizad | * mhm it just seems to be the least pain to get so that's why I asked (idk about its frequency range either so) as for the temperature range related warning thanks | 15:57:46 |
| 1 Dec 2024 | ||
| cat |  Download image.png | 06:42:15 |
| cat | Does someone know if this information is still correct? | 06:42:16 |
| cat | * Does someone know if this information is still correct?
from https://www.rtl-sdr.com/setting-up-a-goes-weather-satellite-antenna-system/ | 06:42:41 |
| 2 Dec 2024 | ||
| cat | In reply to @Freemor:matrix.orgRegarding getting images from Meteor satelltes... Ive found that there are public airspy servers have and tried to get some noaa and meteor images. I managed to get some from noaa using apt, but couldnt see meteor signal at all. Do i need an lna, or would i be able to get enough of it with just aiming? | 13:59:08 |
| cat | * Regarding getting images from Meteor satelltes... Ive found that there are public airspy servers and have tried to get some noaa and meteor images. I managed to get some from noaa using apt, but couldnt see meteor signal at all. Do i need an lna, or would i be able to get enough of it with just aiming? | 13:59:28 |
| cat | * Regarding getting images from Meteor satelltes... Ive found that there are public airspy servers and have tried to get some noaa and meteor images. I managed to get some from noaa using apt, but couldnt see meteor signal at all. Do i need an lna, or would i be able to get enough snr with just aiming? | 14:00:08 |
| cat | * Regarding getting images from Meteor satelltes... Ive found some public airspy servers and have tried to get some noaa and meteor images. I managed to get some from noaa using apt, but couldnt see meteor signal at all. Do i need an lna, or would i be able to get enough snr with just aiming? | 14:14:11 |
| Freemor | In reply to@nannk:synapse.nannk.xyzI have a tram 1411 Discone antenna, a 6db lna, and an rtl-sdr v3. I don't do any aiming. I get the APT images in the 137Mhz range, I have gottens some Meteor images @ 137.9 MHZ it is a pain. The Meteor signals are much weaker than the NOAA APT ones. also it is too close to NOAA 18 so they interfere with one another is they are passing at the same time. | 14:42:34 |