34
Selecting the TX channel: (Ch 50 - 92 by Synthesizer)
Selecting the channel using the Synthesizer system (System Mode)
The modern Synthesizer system eliminates
the need for crystals.
1. Press the MODE button and switch the transmitter
ON to reach System Mode.
Note that the transmitter RF section is switched off in
this mode.
2. Select the channel selector CH using the MODE
button, then set the desired channel within the range
Ch 50 to Ch 92 using the INC+ or DEC- buttons.
3. Pressing ENTER (MODE and CHANNEL
simultaneously) stores the new frequency channel
you have selected. Switch the transmitter OFF/ON
briefly to activate the new frequency channel.
4. Simplified frequency storing: select the new frequency
channel of your choice, then just switch the transmitter
OFF/ON briefly. This stores the new frequency
channel, and simultaneously activates the transmitter
on the new transmission frequency.
Adjusting the steering wheel return spring
The force of the steering wheel return spring can be
varied by means of a recessed cross-point screw (see
Point 5, illustration of transmitter controls). Turning the
adjustment screw clockwise increases the spring force.
Charging the transmitter battery
he charge socket is located at the bottom of the left-
hand side of the transmitter. Note that it is suitable only
for Graupner charge leads. Please do not attempt to
use other makes of charge lead, as their polarity may
be different, in which case the transmitter could be
damaged. The positive terminal (red wire) is connected
to the 5.5 mm Ø outer metal sleeve. The negative
terminal is black and is wired to the 2.2 mm I.D. inner
metal sleeve.
Transmitter charging
If the transmitter is fitted with a rechargeable NC battery,
the pack can be charged via the charge socket located
on the side of the transmitter case.
The maximum permissible charge current varies
according to the battery type. Please be sure to keep
within the battery manufacturer’s stated limits.
Caution: to avoid damage to the transmitter the charge
current must never be higher than 500 mA.
The transmitter’s On/Off switch must be set to “OFF” for
the full duration of the battery charge process.
The transmitter charge socket features a reverse current
guard circuit which prevents damage to the transmitter
electronics if the charge lead plugs or shorted, or
connected with reversed polarity.
In its standard form the transmitter battery cannot be
charged using an automatic charger due to the presence
of the protective circuit, which prevents the charger
monitoring the battery voltage.
The transmitter can be converted for use with automatic
battery chargers by any GRAUPNER Service Centre.
Caution: even if you use an automatic charger the charge
current must be set manually, to ensure that the
maximum permissible charge current of 500 mA is not
exceeded.
Recommended battery chargers
6422
MINILADER 2
6427
MULTILADER 3
6426
MULTILADER 6E*
6428
TURBOMAT 6 Plus*
6429
TURBOMAT 7 Plus*
6430
TURBOMAT 16 Plus*
6417
ULTRAMAT 25*
6416
ULTRA DUO PLUS 30*
* Charge leads required:
8 I
CH
X
M
RATE
EXP
TRIM
L/F
R/B
%
V
REV .
EP
5
0
CH
X
MIX
RATE
EXP
TRIM
L/F
R/B
%
V
REV . NORM
EPA
INC +
DEC -
