Heh...

As he said the JR slimlines are single conversion. Their "filtering" seems to make them respond just as well as dual conversion receivers though.

On our field whenever I use a single conversion receiver on certain channels including the JR 6UL ( Ultra light ) receivers, but NOT the Slimlines and above such as the S600's and S700's... I'll get severe RF hits....

This never happens with the S600's, etc. nor with ( knocks on wood ) any dual conversion receiver that I have used.

Note that many of the "parkflyer" type receivers seem to have shorter antennas, but there are exceptions.

I made the mistake of flying an XPD-8 with a single conversion park flyer RX...

Wrong move... the plane is fairly fast and quickly gets beyond 500'... at which point it drops out of control to the ground.

I'm now flying it with a Hitec Micron which seems to work well.