The Ampro 11 is a helical-wound HF mobile whip antenna for the 11m band (27 MHz) — available in Moonraker and Sigma versions. Designed for mobile HF operation, the helical winding delivers full-size electrical performance in a manageable 245cm physical length, making it a practical choice for 11m and CB band mobile operation.Rated at 250W and with a VSWR of 1.5:1 or better, it's well suited to SSB and AM operation on the 11m/CB band. The 350 kHz bandwidth provides generous coverage across the band. The 3/8" thread fitting is compatible with the vast majority of mobile antenna mounts and magnetic bases.Key Features Type: Helical wound HF mobile whip Frequency: 27 MHz (11m / CB band) Antenna length: 245cm VSWR: 1.5:1 or better Max power: 250W Bandwidth: 350 kHz Fitting: 3/8" thread Available in Moonraker and Sigma versions Technical Specifications Frequency: 27 MHz Type: Helical wound Length: 245cm VSWR: 1.5:1 or better Power: 250W Bandwidth: 350 kHz Fitting: 3/8" thread