Duratrax indycar range
H all,New to this forum and the rc world.hoping someone can help me.I was given two duratrax indy cars complete with radio/controllers.the problem I'm having is very short range.with the antennas to both the car and radio almost touching it.operates fine.once they get approx 6 feet apart they loose their signal.I have tried all the obvious things.antenna wire continuity between wire in antenna and receiver circuit board,battery voltage,various connections,different motors.im a aircraft mechanic who is pretty good with a meter so I think I covered all the obvious points.I have tried ever combination between the two cars.different receivers,esc's,batteries,motors,radio's etc.is there something obvious I'm missing.were these receivers junk,is there something I'm missing?is there a reasonably priced receiver that I could buy as a replacement?thanks in advance for any help.