extender

Just after some tried and tested help please. These extenders seem to be hit and miss and I still can't work out of they are any use or just a waste of time. My Spark with the RC will reach between 300-400m here in the UK. Is there any improvement with these extenders and if so, which one...

I'm pretty impressed with the results so far using a $9.39AUD Antenna Range Extender. On average, I'm getting an extra kilometre. Of course, as they say, your mileage may vary. The funny thing was that when I first got the Spark, I would always turn it around and bring it home as soon as the...