RM Italy KL805 User manual

www.rmitaly.com [email protected]
Remote Control:
The remote head is not supplied from RM Italy however the circuit diagram below shows the requirements
of creating a remote front panel if required. The connector is an RJ45 type and cable length should be no
more than 3m in length. The remote front panel controls offer the same functionality as the front panel of
the KL805.
The function of the pins present on the remote connector as as follows:
1. Ground
2. Preamplifier ON input
3. Wattmeter signal output
4. Power output for the remote command
5. Hi power input
6. Linear amplifier ON input
7. Low power input
8. SSB input
At no time should should voltage appear on pins 5 & 7 at the same time.
When using the remote control, the switches on the front panel should be set as follows:
 Preamplifier OFF
 Linear Amplifier OFF
 SSB / AM AM Mode
 Power set to Mid, (center), position.
The digram below shows the circuit diagram of the remote control circuit and pin out of the RJ46 front
Pin1 Pin 8
Warranty:
The KL805 is covered by a 24 month warranty against manuafacturing defects, from the
date of purchase. The RF transistors, external and asthetic damage are not included in the
warranty.
KL805 Linear Amplifier
www.rmitaly.com [email protected]
25-30 MHz
Specifications:
Freq. Range: 25-30MHz
Power Supply: 22-30Vdc (24V)
Max input current: 35A max
Fuse: 3x12A
Input Power: 1-15W max.
Output Power: 600W max.
Modes: AM FM SSB CW
Red
Black
+
-
RTX
Max 15.0W
Battery / PSU
24Vdc
ANTENNA
RTXANT
KL805
The KL805 is a 24Vdc narrow band HF Linear amplifier covering 25-30MHz.
Maximum output power is 600W from 15W input power. It may be used in
AM,SSB,CW and FM modes of transmission. The KL805 features a independant
receive preamplifier that provides about 26dB gain for the received signal. The
diagram below and the front and rear panel descriptions on the following page show
how the amplifer should be connected. The KL805 features an internal RF switch
so when the linear amplifier is switched on, it will automatically switch to TX and
amplify the output of the transceiver when there is RF on the RTX input connector.
The KL805 features internal automatic VSWR protection and will shut down if the
antenna VSWR increases about about 2.5:1 protecting the transistors from damage.
It is also protected from excessive temperature that when reached will disable the
amplifer and increase the fan speed to maximum speed, automatically resetting
when the temperature falls to within the normal range. The KL805 is also protected
against accidental DC input reverse polarity.

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.