KL503 HD
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:
8x RM 3 1x RM 4 MOSFET Driver
Max I/P Current:
30A
Power Supply:
13VDC+/- 1V 40A
Input Fuse (Internal):
3x10A (5x20mm Fast)
Input RF Power:
1-35W max (All modes)
Output RF Power:
300W 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 May 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
13VDC (± 1V) Power Supply or Auto Battery. Pay at-
tention to the correct polarity
4. Make sure that the amplifier is switched off
5. Adjust the Transceivers RF output power to 25W
(35W max) if it is capable of more than 25W 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.
