Question on extending cable to aerial

[thenookorkney]

Good morning

My new Radarbox external antenna has a 10m cable and I need to add about 3m or so.  Can I just use any low loss coax with male and female sma connectors.  I can get 50ohm easily but does it need to be lower.

Thanks in advance

[Runway 31]

You can get an extension cable from the Airnav store.  For best results the cable used to extend should be an equivilant rating to the main cable and joints really need to be done right to ensure loss is not extended

Alan