vhfwxsatellitetips-hw
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vhfwxsatellitetips-hw [2021/08/02 15:08] – [Radios] mm3iig | vhfwxsatellitetips-hw [2021/08/14 23:43] (current) – [Low Noise Amplifiers] mm3iig | ||
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+ | [[vhfwxsatellitetips|Front Page]] | [[vhfwxsatellitetips-antenna|Antennas]] | [[vhfwxsatellitetips-hw|Hardware]] | [[vhfsatellite-sw|Software]] | [[vhfsatellite-general|General Tips]] | [[vhfsatellite-gallery|Gallery]] | ||
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====== Hardware Overview ====== | ====== Hardware Overview ====== | ||
===== Radios ===== | ===== Radios ===== | ||
- | To follow, some general information on what you can do this with (RTL-SDR dongle, | + | It is entirely possible to do this with just an RTL-SDR dongle |
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+ | Moving up to a better, more sensitive SDR with higher bit resolution would definitely help. The Airspy kit looks good, MM3IIG and M7SMU swear by their RSP1As which seem to do a better job of picking the weaker low-angle signals out of the noise than the dongles with their poor front ends. | ||
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+ | If you’ve got a hardware receiver that can do this then great! Especially | ||
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+ | And finally remember: you can’t do this with a handheld and out to an audio jack as the 25 kHz bandwidth | ||
===== Low Noise Amplifiers ===== | ===== Low Noise Amplifiers ===== | ||
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If you move away from VHF to higher bandwidth/ | If you move away from VHF to higher bandwidth/ | ||
+ | The Nooelec stuff is all great and well-supported, | ||
===== Bandpass Filters ===== | ===== Bandpass Filters ===== | ||
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This also applies to those weaker signals at lower angles (for both APT and LRPT). Sometimes you’ll want the gain up to help and that lets the intermod in. Filtering before gaining up will mean your radios front end won’t have as many issues with other signals interfering. | This also applies to those weaker signals at lower angles (for both APT and LRPT). Sometimes you’ll want the gain up to help and that lets the intermod in. Filtering before gaining up will mean your radios front end won’t have as many issues with other signals interfering. | ||
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+ | Here's a good resource on making a filter with the kind of materials you may have lying around (standard capacitor values, etc): https:// | ||
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+ | You may well decide that a certain signal is so powerful that you want to use a notch filter to remove it instead, of course. |
vhfwxsatellitetips-hw.1627916901.txt.gz · Last modified: 2021/08/02 15:08 by mm3iig