Yaesu ATAS-25 Portable Antenna System for 40M-70CM (View ATAS-25 Documentation)
The ATAS-25 utilizes a manual tuning system which resonates the radiating element for lowest SWR without the need for expensive, inconvenient mono-band resonating whip assemblies. The ATAS-25 allows dual-frequency operation (on HF or 50 MHz and either 144 or 430 MHz), if two transceivers are combined via a suitable diplexer (not supplied). The ATAS-25 is designed to mount directly onto a standard camera tripod (not supplied).
| OPERATING BAND |
RADIATING ELEMENT(S) |
| 7 MHz |
Three Elements |
| 14 MHz |
Three or Two Elements |
| 21 MHz |
Two Elements |
| 28 MHz |
Two or One Elements(s), or No Connection |
| 50 MHz |
Do Not Connect |
| 144 MHz |
Not Used |
| 430 MHz |
Not Used |
Frequency Range: 7/14/21/28/50/144/430 MHz - Amateur Bands
Input Impedance: 50 Ohms
Max. Input Power: HF/50 MHz: 100 W (SSB/CW, 50% Duty)
50 W (AM/FM)
144/430 MHz: 50 W (ALL MODE)
Matched SWR: Less than 2.0:1
Height (Approx.): Max. 7.2 ft (2.2 m) during Operation
Min. 1.96 ft (0.6 m) for Transporting
Weight (Approx.): 2.05 lb. (930 g)
ATAS-25 Main Body.............................................................. 1
Radiating Elements .............................................................. 3
Radial Element (for VHF band) ............................................ 1
Radial Element (for UHF band) ............................................ 1
Radial Wires (20 ft (6 m) , 9.8 ft (3 m) & 6.6 ft (2 m) Length) ... 1
Spare Radial Wire (32.8 ft (10 m) Length) ........................... 1
Allen Wrench ........................................................................ 1
Operating Manual ................................................................. 1
