Note
The Kenwood AT-200 is an antenna tuner designed for use with Kenwood TS-520 and TS-820 series transceivers. It is a versatile station accessory that combines an antenna coupler, a through-line RF wattmeter, an SWR meter, and an antenna switch into a single unit. The device is specifically engineered to match various antenna loads to a 50 Ω input impedance while reducing TVI (Television Interference) by acting as a band-pass filter.
Features
– Operating Range: 1.8 MHz and 30 MHz.
– Integrated Metering: Features a built-in through-line RF wattmeter and SWR meter for monitoring performance.
– Antenna Selection: Includes a four-output antenna switch that can connect two coaxial-fed antennas, one wire antenna, and one dummy load.
– Tuning Capability: Equipped with a universal matching circuit capable of matching loads ranging from 10 Ω to 500 Ω.
– Through Mode: Includes a "THROUGH" switch position that allows an antenna to be connected directly to the transceiver while still allowing for power and SWR measurement.
– Low Loss Design: Utilizes a low-loss toroidal core to realize minimal insertion loss during operation.
Specifications
– Frequency Range: 6 amateur bands from 1.8 to 29.7 MHz.
– Input Impedance: 50 Ω.
– Output Impedance: 10 to 500 Ω, unbalanced.
– Output Impedance (1.8 MHz only): 20 to 500 Ω, unbalanced (100W max power).
– Max Through Power: 200W maximum.
– Insertion Loss: Less than 0.5 dB when well-matched.
– Measurable RF Power: Switched ranges for 20W and 200W.
– Measurement Modes: Switched for forward power and reflected power.
– Accuracy: Better than ±10% of full scale.
– SWR Meter Detection: Toroidal core directional coupler.
– Measurable Range: 1.1 to 10.
– Minimum Required Power: 4W.
– Input Connector: UHF type (50 Ω).
– Antenna Connectors:
ANT-1 & ANT-2: UHF type for coaxial cables.
ANT-3: Specifically for wire antennas
