Page 13
EXTERNAL DATA CONNECTORS
The LA-1K automatically selects bands and it is normally NOT
necessary to connect band data cables between your transceiver and
the LA-1K ampli er.
Radio Interface (ICOM/YAESU) Connector
This connector is designed to be pin compatible with other ampli ers.
The required cables are widely available. They can be used to connect to
the ICOM and YAESU transceivers.
RS-232 Band Control (Kenwood) Connector
This connector is designed to be used with Kenwood transceivers for
band selection using a null modem adaptor. It is also designed to control
the ampli er from a computer.
PIN
FUNCTION
1
BCD B IN
2
BCD A IN
3
Kenwood RX
(data IN) *
4
Kenwood TX
(data OUT) *
5
ICOM Band Data
6
GROUND
7
Amp-Key IN
8
BCD D IN
9
BCD C IN
PIN
FUNCTION
1
N/C
2
RS-232 Transmit
3
RS-232 Receive
4
N/C
5
GROUND
6
N/C
7
RTS
8
1kΩ Pullup Resistor
to +12V *
9
N/C
* Custom cable required
* Required with Kenwood transceivers
XCVR Interface
(Radio Interface Pinout)
RS-232 Band Control
(Kenwood) Pinout
PALSTAR
Page 10
PREVENTING DAMAGE
TO THE LA-1K
WARNING
TO PREVENT DAMAGE TO THE AMPLIFIER:
Never
drive input power in excess of 60 Watts.
Never
use a tuning pulser in CW full break-in mode. The LA-1K was
NOT
designed for full break in CW operation Very high speed full break in
keying which toggles the PTT line can lead to ampli er damage.
Never
block the air vents of the LA-1K. Without proper air ow, excess
heating of internal components may occur.
