KL703
HF 25—30 MHz Linear Amplifier
Specifications:
Operation Frequency:
25—30 MHz (10m Amateur HF Band)
Modulation Types:
SSB,CW,AM, FM, data etc (All narrowband modes)
Transistor:
16x RM 3 MOSFET
Max I/P Current:
50A
Power Supply:
13.8VDC+/- 1V 60A
Input Fuse (Internal):
4x15A (Auto Fuse)
Input RF Power:
1-35W max (All modes)
Output RF Power:
500W max
Maximum bypass power (Amplifier off): 50W max
Input VSWR:
1.1—1.5:1
Output VSWR Maximum:
2.5:1
Harmonic Output:
>-50dBc 25-30MHz
WARNING:
Before using this product please read carefully all of
the information in this manual or at least the quick start guide!!! To avoid dam-
age or incorrect operation this is extremely important!!!
Ver 1.0 Oct. 2018
2
Quick Start Guide:
A more complete guide to the installation is featured later
1. Connect the RTX input connector to transceiver with
50 Ohm patch cable
2. Connect the ANT Output of the Amplifier to SWR
Bridge / Wattmeter (If required), and then the Antenna
(50 Ohm load Impedance)
3. Connect the Amplifier DC power Cable to a suitable
13.8VDC (± 1V) 60A Power Supply or Auto Battery.
Pay attention to the correct polarity
4. Make sure that the amplifier is switched off
5. Adjust the Transceivers RF output power to 30W
(35W max) if it is capable of more than 30W output
6. Switch on the Amplifier and start operating
7. Check that the antenna VSWR is acceptable with the
amplifier in use. Any large increase in VSWR indi-
cates that the Antenna is not suitable for the power
being used. Operation should be halted immediately
to avoid damage to the Amplifier / Radio / ATU etc.
