The ATAS-120 mobile antenna system is designed for use with Yaesu transceivers equipped with the ATAS system ( Active Tuning Antenna System). These Yaesu transceivers are the new FT-897, FT-847 and the FT-100/D. The ATAS-120 utilises a motorised tuning system which resonates the radiating element for the lowest SWR using control voltages sent to ther ATAS-120 via the coaxial cable connected to your rig. The ATAS-120 is designed to mount directly onto a standard SO239 mobile antenna mount (not supplied). Magnetic mounts are not generally suitable for this antenna. For operation on 144 and 430MHz bands a diplexer for the FT-897 and the FT-100/D or triplexer for the FT-847 maybe addionally purchased. The optional ATBK-100 VHF/UHF antenna base kit is also available

Yaesu's patented ATAS^TM (Active Tuning Antenna System) makes the ATAS-120A a unique mobile antenna designed for use with Yaesu's transceivers, such as the FT-897, FT-857, FT-847, FT-100/100D and the FT-450.It provides 7/14/21/28/50 Mhz bands coverage with automatic motorised tuning

Key Features/Specifications:

• Frequency range: 7/14/21/28/50/144/430MHz 
• Max input power: 120W (A3J) 
• Input impedance: 50 Ohms 
• Matched SWR: < 2.0:1 (with proper counterpoise) 
• PL259 plug for SO239 base 
• Solid 'trombone' sliding sections 
• 20% faster than ATAS-100 
• Size 1.4-1.6m 
• Weight 900g 

Note: The ATAS-120A is designed specifically for use with Yaesu transceivers equipped for the "ATAS" system, and is NOT capable of automatic operation with other transceiver models