Why doesn't JR662 have proportional flap knob?
Yup, I've got the same problem with my JR XF631.
Didn't really think about it until sometime after I got the radio.
If I'd thought about it in advance, I probably would've got the Futaba 6AS instead for the same money :stupid:
You could try asking in the JR support forum if the switch can be swapped out for a dial.......