Feeding multiple 2M ham repeaters with one SDR dongle?

[Thunderknight]

I understand that for the RTL-SDR dongles, they are good for about +/- 1 MHz. If I center it on say 146.5, I should be able to use it to tune multiple area 2M ham repeaters. And I'd like to do this on a Raspberry Pi.

But...how do I feed multiple individual analog conventional repeaters with a dongle? I see writeups about feeding trunked systems using SDR dongles.

I'm thinking something like:
146.79 Repeater in County A
147.18 Repeater in County A
147.03 Repeater in County B
etc.
It wouldn't scan them, but would be 3 separate simultaneous feeds using one receiver (dongle) and computer (Pi).

From what I've read, I think this is easily done for a Calls feed of a trunked system...but can it be done for individual conventional FM feeds? I'd rather not have to dedicate a stack of radios to feed them if it can be done with an SDR dongle.

Thanks

 

[lwvmobile]

rtl_airband should be able to handle that and send the feed to an icecast server. 1 dongle should easily handle those three since they are all within 1Mhz of each other.

GitHub - szpajder/RTLSDR-Airband: Multichannel AM/NFM demodulator

Multichannel AM/NFM demodulator. Contribute to szpajder/RTLSDR-Airband development by creating an account on GitHub.

github.com

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Multichannel AM/NFM demodulator. Contribute to charlie-foxtrot/RTLSDR-Airband development by creating an account on GitHub.

github.com

RTLSDR-Airband – Fuzz The Pi Guy

fuzzthepiguy.tech

 

[Thunderknight]

So "RTLSDR-Airband" is good for more than just the "Air Band"....ah
Thanks

 

[DC31]

The raspberry pi (Linux) typically uses pukseaudio to manage sound. RTLSDR_airband supports a “pulse” sound output To direct it to pulseaudio. Set up multiple Null Sinks in pulseaudio to receive your individual channels and from there route the audio to your repeaters. Of course, it isn’t as simple as I can make it sound…

have a read of this WIKI:

RTL SDR multiple FM channels - The RadioReference Wiki

wiki.radioreference.com