DSDPlus Antenna setup

[Mr_Sample]

Hi can eany one help me understand is this setup is good for P25 phase 2
Its trunking normal but I think it's can be improved.
Setup 2x V3 dongles
2x nagoya NA-771 (VHF UHF)
and for testing purposes 2x Tp link 2,4 ghz

 

[riccom]

Hi can eany one help me understand is this setup is good for P25 phase 2
Its trunking normal but I think it's can be improved.
Setup 2x V3 dongles
2x nagoya NA-771 (VHF UHF)
and for testing purposes 2x Tp link 2,4 ghz
View attachment 69071

I think it may be too much antenna, and you would be good using the 2.4 antennas, a miss match like that will cause the antenna to resonate at a (lower mhz) band,

Sent from my moto e5 play using Tapatalk

 

[foxtail]

Only problem I see is that the rtl only goes to 1.7-1.8
So the TP are out..they are reverse pos. too I think....

 

[foxtail]

I do like the setup. I am also trying something along that line.

 

[M105]

What frequency are you trying to monitor? Use an antenna for that frequency with a proper 75 ohm splitter cabled to each dongle or use two antennas with one connected to each dongle. Using multiple antennas with a "T" connector and not a splitter will mismatch your impedance. Keep it simple..

 

[prcguy]

Looks like a mess to me and most anything else would probably work better.

 

[TheButcher]

Id run the different aerials thru a TV rf splitter / combiner. You know, the type with 'F' connectors. You will get roughly -3dB of attenuation per port, but it will be vastly better than what you have there RF wise i'd say...

 

[slicerwizard]

You will get roughly -3dB of attenuation per port

3 dB of gain? I don't think so...

 

[TheButcher]

Ah, yea, ~-3dB or 3dB of attenuation per port. Mr. slicerwizard is correct. Well, I was only 6dB out !

Thanks for correcting me