The Iskra FM50 is a directional FM reception antenna designed for the 87.5–108 MHz band. With 5 elements and a gain of 6.5–7.5 dBi, it provides improved signal capture compared to omnidirectional alternatives, and its front-to-back ratio of 18–24 dB helps reject interference arriving from behind the antenna.

The antenna connects to a receiver or distribution amplifier via a female F connector and mounts on masts with an outside diameter of 20–62 mm. Beam width of 50° horizontal and 70° vertical allows some flexibility in alignment, while the 0–10° inclination adjustment gives fine control over the reception angle.

Key Features

• 5-element directional FM antenna for 87.5–108 MHz
• Gain: 6.5–7.5 dBi
• Front-to-back ratio: 18–24 dB for rear interference rejection
• Beam width: 50° horizontal / 70° vertical
• Antenna length: 176 cm
• Impedance: 75 Ohm
• Connection via female F connector
• Inclination adjustment: 0–10°
• Mast mounting for outside diameters of 20–62 mm

Product Benefits

• 5-element directional design captures more signal than a simple rod or dipole, improving reception in areas with moderate signal strength
• 18–24 dB front-to-back ratio reduces pickup of interference from transmitters behind the antenna, improving audio clarity
• Female F connector makes connection to standard coaxial distribution systems straightforward
• Wide mast compatibility (20–62 mm) suits the majority of rooftop and balcony installation masts
• 0–10° inclination adjustment allows optimisation for the elevation angle of the transmitter

Technical Specifications

• Model: Iskra FM50
• Frequency Band: FM — 87.5–108 MHz
• Number of Elements: 5
• Gain: 6.5–7.5 dBi
• Front-to-Back Ratio: 18–24 dB
• Beam Width: Horizontal 50°; Vertical 70°
• Antenna Length: 176 cm
• Impedance: 75 Ohm
• Coaxial Connection: Female F connector
• Inclination: 0–10°
• Mast Diameter Compatibility: 20–62 mm (outside diameter)

Why You'll Love It

• Mast mounting is straightforward with the included bracket accommodating masts from 20 to 62 mm — covering virtually all standard installations
• The F connector makes it easy to connect to coaxial cable runs and existing distribution systems without adapters
• At 176 cm, the antenna is compact enough for balcony or terrace installation while still providing directional gain
• Iskra is a well-established manufacturer of FM and TV antennas, with the FM50 a standard model in their directional FM range