Re: P25 for Cheap


Donald Lambert <banjodhl@...>
 



Michael WA7SKG;

Interesting, thanks for the info.

don/k0kuz

ZUT

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On Wednesday, November 6, 2019, 9:26:18 AM PST, Michael WA7SKG <wa7skg@...> wrote:


There are broadband (30-1200 MHz) amplified multicouplers available on
eBay and similar sites. Typically 4-8 outputs with a slight gain. I
picked up a 4-port device on eBay for about $20. Connected to a wideband
discone, two scanners and two SDR dongles it seems to hear everything I
want to hear.

Michael WA7SKG


Rick NK7I wrote on 11/5/19 9:37 PM:
> The minimum loss in a splitter (non-amplified) will be 3 dB, which is
> half the signal (not trivial); which may be enough to lose out on
> hearing.  Most splitters that you find at your local store are not THAT
> good, so losses will be higher.  If you MUST, make sure it's been
> spec'ed and rated for well into the GHz range (satellite systems use
> these) AND use quality cable.
>
> On the usual frequencies where one would listen to P25, antennas are
> either cheap or easy to make (then you worry about connector loss, line
> loss, phase distortion and other challenges).  ;-)
>
> Rick NK7I
>
>
> On 11/5/2019 6:29 PM, Kevin Elliott wrote:
>> You should be able to get away with a single antenna and put a
>> splitter on it (since you are not transmitting). There will be a
>> slight insertion loss for it, but in most cases it’s not significant
>> enough to be worth having to have two antennas to deal with.
>



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