1.
SSB-CW / AM/FM Switch
2.
Preamplifier ON / OFF Switch
3.
Linear Amplifier ON / OFF Switch
4.
Output Power Selector
5.
Transmission ‘TX’ LED indicator
6.
Receive Pre-Amplifier ‘ON’ LED indicator
7.
Linear Amplifier ‘ON’ LED indicator
8.
Output Power LED Indicator:
Green - Low Power
Orange - Medium Power
Red - High Power
9.
Output Power level and Protection indicator
10.
Remote Control Connector
1.
SO239 (UHF) Transceiver (RTX) Connector
2.
SO239 (UHF) Antenna (ANT) Connector
3.
24VDC Power Supply input connector
KL805 Front and rear Panel Connections:
Operation:
Connect the amplifier as shown on the front cover connection diagram. Ensure that the KL805 is
located in an area that will provide adequate ventilation for the heatsink.
Use power supply cables of at least 6mm cross sectional area and directly connected to a 24V
battery system or 24Vdc power supply, and cables no longer than 3meters in length. The power
supply cables should be as short as pratically possible, if a longer length is required the cross
section of the cable conductor should be increased accordingly. The cables should be attached to
the supplied mating connector of the KL805 and secured firmly wih the screw terminals on the
connector.
Use a good Quality antenna with at least 1000W continuous power rating and tuned to give a
maximum VSWR of 1.5:1 or less. The coaxial feeder from the amplifier to the antenna should
be 50 Ohms impedance and suitably rated for the at least 1000W continuous use. It too should
be kept as short as practically possible. Excessive coaxial cable length only increases losses both
in transmisssion and reception
Do not hold the amplifer in transmission at maximum power for extended periods of time as it is
not designed for continuous duty cycle. Allow sufficient time between transmissions for the
transistors to cool down.
If the antenna VSWR increases beyond a preset value the amplifer will protect itself by shutting
down the amplifer and flashing all of the LED’s on the output power LED indicator. To restore
normal operation the antenna VSWR should be adjusted to within acceptable limits <2.0:1 but
prefereably 1.5:1 or less. The Amplifier On OFF switch needs to be cycled OFF and OBN to
restore operation.
If the heatsink temperature is allowed to increase excessively the internal thermostat will shut
down the amplifer and increase the cooling fan speed to maximum. The KL805 will
automatically reset when the temperature falls to within acceptable limits. It is advised not to
switch off the amplifer during this time as the cooling fans will reduce the temperature at a faster
rate.
The receive preamplifier may be used independently without having the amplifer switched on.
Maximum input power should be no more than 15W. The output power of the KL805 can be
regulated in two ways. Either by reducing the input power on the transceiver or by selecting
Low Mid or HI power from the front panel of the KL805.
If using SSB or CW the SSB switch should be set to SSB. This will provide a short delay, about
1 second, to the RTX relay before it switches back to RX avoiding the RTX relay switching
back to RX during pauses in speech.
