Note
The Kenwood AT-230 is an antenna tuner designed for use with Kenwood HF transceivers. It is a universal matching type tuner capable of matching 10 to 500 Ω unbalanced loads to a 50 Ω input impedance. The unit features a low-loss toroidal core that ensures low insertion loss and provides harmonic attenuation, which is effective in reducing TVI.
It was designed as a matching accessory for the TS-130S and the TS-830S transceiver.
Features
– Comprehensive Integration: Consists of an adjustable antenna coupler, a through-line RF wattmeter, an SWR meter, and a four-position antenna switch.
– Wide Band Coverage: Designed for use on all amateur bands between 1.8 MHz and 30 MHz.
– Multi-Output Antenna Switching: Includes four outputs: two for coaxial-fed antennas, one for a wire antenna (such as an inverted-L), and one dedicated for a dummy load.
– Dual-Range Wattmeter: The RF wattmeter features selectable 20W and 200W ranges.
– Advanced SWR Detection: Uses a toroidal core directional coupler for accurate SWR measurement.
– Bypass Capability: The "THROUGH" switch position allows antennas to be connected directly to the transceiver, bypassing the matching circuit while still allowing power and SWR measurement.
Specifications
– Frequency Range: 9 amateur bands from 1.8 to 29.7 MHz.
– Input Impedance: 50 Ω.
– Output Impedance: 10 to 500 Ω, unbalanced (20 to 500 Ω for the 1.8 MHz band only).
– Through Power: 200W maximum (100W maximum for the 1.8 MHz band).
– Insertion Loss: Less than 0.5 dB at optimum match.
– Measurable RF Power: Up to 20W or 200W, switched.
– Accuracy: Better than ±10% of full scale.
– SWR Detection: Toroidal core directional coupler.
– Measurable Range: 1.1 to 10.
– Minimum Power Required: 4W.
– Connectors:
INPUT: UHF type (50 Ω).
ANT-1 & ANT-2: UHF type for coaxial antennas.
ANT-3: Terminal for wire antennas only.
DUMMY: Dedicated connector for a dummy load (not fed through the coupler).
GND: Stud for grounding to a good earth ground.
