Model Forum / Radio Controlled / Air Models / February 2004

Hi all

Any comments.

The powers that be in NZ have decreed that all frequencies above
72.5mHz are no longer to be used here (conflict with R/c cranes, log
hawlers and rail shunting engines).

I was on 72.550mHz (Ch. 38 US)   :-{
In process of moving to 72.250mHz (Ch. 23 US).

JR and FMA brand R/x (maybe others) can be used on any frequency in
the 72mHz band.
Futaba have Hi and Lo 72mHz R/x and say Hi band R/x with Lo (Ch. 23)
crystal are not compatible.

Took all gear to the field and set up a test.

With T/x (aerial down) 30 paces away, tried every compatible
combination.
T/x module (Ch. 38 and 23 I have both for test), and Futaba R/x (Hi
and Lo with R/x crystals for 38 and 23).

Found no problems with Hi R/x with Lo crystal installed.

At about 60 paces between T/x and R/x had jittering of servos
with Hi to Hi combination as expected as well as Hi to Lo
combinations.

Are Futaba being super cautious about Hi R/x - Lo crystal
combinations.
Any one regularly swap Hi - Lo crystals in Futaba gear.

V