Originally Posted by ommadawn
Heres a question for the RF techs. Im planning on using a 2.4Ghz 18Db patch and a Lawmate Rx with my RV tracker. Do I need 50ohm or 75ohm impedance coax? I intend using only about 200mm. Will it make a difference over this length?
You need 50 ohm cable. Yes, it could make a difference as the cable otherwise would act like an impedance transformer. Not likely that something would happen since this is the receiving side of things, but you get better reception with a matched impedance.
Check for an apropriate RG58 or RG316 coax cable. They can be bought off ebay for not much money.