ADS-B antenna to receiver cable runs


#1

Want to add external antenna to my set up. :smiley:

What type of cable and how far can I make the run?? :confused:

Thanks

Gary


#2

I am running a 50 ft RG-6 from Home Depot to a homemade groundplane antenna on the roof. Range up to 200NM where the hills aren’t in the way.


#3

This site will let you calculate cable loss for different types of cables over different lengths and frequencies.
Joelwiley’s 50ft of RG-6 for example will loose half (!) of the received signal (3.5 dB) in the cable.
This might sound much but even the thicker and more expensive RG11/u doesn’t do much better.

So the RG-6 cable is ok. Also pay attention to the connectors, the way they’re connected, possible solder joints. At these frequencies sloppy work can easily cost you 0,5dB. Think of using a roof mounted pre-amp if you need to go a very long way down.
(good reference material)

The good news is that - given line of sight - signals are strong enough to overcome the cable/connector loss.
Being obstructed (or below horizon) signals rapidly drop and the few dB won’t help.
In summary: Prioritize on getting your antenna as high up and free as possible.
/paul