Graupner Hendheld RC 2.4 GHz No. of channels: 12 33124 Data Sheet

46

Servo mounting lug

Retaining screw

Rubber grommet

Tubular brass spacer

Servo arms must be free to move throughout their 

4. 

entire range of motion. Pay attention that there are no 
objects which could hinder servo arm motion.

The sequence in which servos are connected to the 
receiver depends on the type of model. Follow the 
connection layouts provided for this on pages 57 and 59.
Also observe the safety notices provided on pages 4 … 9.
In order to prevent uncontrolled movements of servos 
connected to the receiver during startup

and when fi nished with operation 

When programming the transmitter, be sure that 
electric motors cannot start running without control 
or that a combustion motor equipped with automatic 
starting cannot start up unintentionally. To be safe, 
disconnect the receiver's drive battery or, in the case of 
a combustion motor, disconnect the fuel supply.

The function of every individual channel is determined 
by the transmitter used, not by the receiver. However, 
channel assignments can be changed in the receiver 
by programming done in the "Telemetry" menu. 
Nevertheless, it is recommended this be done on the 
transmitter side via the "Transmitter output" option, see 
page 206.

Wrap the receiver in a foam rubber pad that is at 

1. 

least 6 mm thick. Attach the foam rubber to the 
receiver with rubber bands so it will be protected 
against vibration and/or the jars of a hard landing. 
All switches must be installed such that they are not 

2. 

affected by exhaust gasses or vibration. The switch 
knob must be freely accessible over its entire range 
of movement.
Mount servos on rubber bushes/spacers with hollow 

3. 

brass bearings to protect them from vibration. Do 
not tighten the fastening screws down too tight as 
this would negate the vibration protection to be 
provided by the rubber bush/spacer. Only when servo 
fastening screws are properly tightened will this 
arrangement provide security and vibration protection 
for your servos. The fi gure below shows how a servo 
is mounted properly. The brass bearings are to be 
pushed into the rubber bushes/spacers from below.

Regardless of which Graupner receiver system you use, 
the procedure is always the same.
Please pay attention that the receiver's antennas must 
be mounted at least 5 cm away from all large metal 
parts or any wiring that is not directly routed out of 
the receiver itself. In addition to steel parts, this also 
includes carbon fi ber parts, servos, fuel pumps and all 
kinds of cables etc. Optimally the receiver should be 
placed at a readily accessible location that is well away 
from all other equipment. Under no circumstances may 
servo cables be wrapped around the antennas or routed 
close to it.
Please note that cables are subject to the acceleration 
forces which occur during fl ight and these forces may 
cause such cables,  to shift in position. Therefore be 
sure the cables in the vicinity of the antennas are not 
able to move. Such moving cables can cause reception 
disturbances.
Tests have shown that vertical (upright) antennas 
provide the best results during wide-range fl ights. In the 
case of diversity antennas (two antennas), the second 
antenna should be oriented at a 90° angle to the fi rst 
antenna.
The GR-24 HoTT receiver connections designated 
"11+B" and "12+B" are intended for battery connections. 
If necessary, an addition battery connection for a 
servo can be made if a V or Y cable is used, Order 
No. 3936.11. The power supply is bussed across all 
numbered connections so it can be attached at any 
of these 12 connectors. However, due to additional 
voltage losses associated with the traverse connectors, 
connections 8, 9 and 10 should not be used for 
connecting the receiver's battery.