AMERITRON SDC-104
for
Automatic Screwdriver Antenna Controller
Elecraft, Icom, Kenwood and Yaesu Radios
INSTRUCTION MANUAL
PLEASE READ THIS MANUAL BEFORE OPERATING THIS MACHINE!
_______________________________________________________________________
Version 1C
Printed in USA
116 Willow Road
Starkville, MS 39759 USA
662-323-8211
www.ameritron.com
Introduction:
The SDC-104 Screwdriver Antenna Controller will automatically adjust the
antenna to the transceiver’s frequency. The controller reads the frequency from
an Elecraft, Icom, Kenwood or Yaesu Transceiver. The controller then moves
the antenna to the correct location. The controller connects to any Elecraft,
Kenwood or Yaesu that has an RS-232 or Icom CI-V or Yaesu TTL. The
antenna must have a sensor installed for the antenna controller to operate
properly. If your antenna does not have a sensor, contact the antenna
manufacture or Ameritron.
Features:
Automatic antenna tuning
Frequency display
Manual UP/ DOWN buttons
Adjustable current sense trip for Antenna Motor Production
Antenna turns counter
Home
Operation controls
Power: Switches the controller’s power on and off.
Up: Moves the antenna up.
DOWN: Moves the antenna down.
SETUP: Allows programming of the antenna
SKIP: Navigates thru the menus
ENTER: Stores the menu setting.
TUNE: Moves the antenna to a programmed setting for the displayed
frequency.
INSTALLATION:
WARINGING: Do not reverse the polarity of the Red and Black wires.
Damage will occur to the controller.
1. The Red Power Line needs to be fused to protect the controller and the
antenna. The fuse must be no larger than a 5 amp rating. Some antennas may
require a lower current rating. Refer to the antenna’s manual for the current
rating. Connect the Red wire to a +12 VDC Supply. Use 16 gauge wire when
adding additional length.
2. Connect the Black wire to the negative of the power supply or chassis ground.
3. Connect the four prong Molex plug to the antenna. Note: Some antennas do
not have the correct plug to match the controller’s plug. The mate can be order
thru Ameritron part number 13-TAR102-2. Or the plug can be cut off and hard
wire to the antenna. See pictorial for wire color and its functions.
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motor control
Antennas that do not have a 4 pin plug. The plug can be cut
off. Use the chart below for wire color and its function.
CONTROL CABLE
RED MOTOR WIRE
BLACK MOTOR WIRE
GREEN SENSOR
WHITE SENSOR
WARNING: An RF choke must be placed around the control lines at
the antenna. The Controller may be damaged if an RF
choke is not used.
Motor Operating Voltage
This control unit is designed to operate with a screwdriver antenna that operates
on 12 volts. Some antennas operate on only 3 or 4 volts, a Dropping Resistor
can be used inline with the motor wires to bring the voltage down. Consult your
antenna manual or manufacturer for the operating voltage.
Important: Failure to adjust and operate your screwdriver
antenna at the proper voltage will damage the
antenna motor.
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