ORIGINAL: Campy
You will also find that dual conversion receivers have a substantially greater range than single conversion receivers. Single conversion receivers are typically found in the small to mid size electrics.
Campy,
I thought that too. However there are companies that provide single conversion receivers that provide DSP instead of dual conversion that have .6 KM range ratings or higher. I don't know the electronics of either, but that is what I have read.
Then Hitec came out with a new line of single conversion receivers rated at 1 mile + range.
4 Channel
http://www.hitecrcd.com/product_fs.htm
1,2,3,4,6
http://www.hitecrcd.com/product_fs.htm
1,2,3,4,5 - shift select
http://www.hitecrcd.com/product_fs.htm
About the same weight as the Micro 555 and about 40% less expensive. Have not tried one yet. I use almost all Hitec receivers so I watch what they are producing.