Antenna Preamplifier 25 dB No name ANT0598 for Logarithmic Antennas

The Antenna Preamplifier 25 dB No name ANT0598 for Logarithmic Antennas is a compact RF amplifier intended to be mounted close to a log-periodic antenna. It provides 25 dB of gain to boost weak broadcast signals before they travel through the coaxial cable, helping to offset cable attenuation and improve signal-to-noise ratio for TV, FM or VHF/UHF reception when used within the antenna's operating bandwidth. The housing and form factor are designed for outdoor mounting near the antenna feedpoint to minimize the length of unamplified cable and reduce system noise contribution.

Advantages

This preamplifier delivers a fixed 25 dB gain to increase received signal levels and compensate for feedline losses. By amplifying signals at the antenna, it reduces the impact of cable attenuation and connector losses on overall reception. The compact design allows straightforward mounting at or near the antenna, reducing the unamplified cable run and improving effective sensitivity. The unit is suitable for use with logarithmic (log-periodic) antennas, where its bandwidth and gain characteristics enhance performance across the antenna's covered frequencies.

Suitable for

• Improving TV reception where long coax runs cause signal loss
• Boosting FM broadcast signals for receivers with weak input
• Enhancing VHF/UHF reception when paired with log-periodic antennas
• Outdoor installations that require a compact antenna-mounted amplifier

Key specifications

• Gain: 25 dB
• Intended antenna type: Log-periodic (logarithmic) antennas
• Application: TV, FM, VHF/UHF reception depending on antenna bandwidth
• Mounting: Antenna/feedpoint mounting (compact outdoor unit)
• Purpose: Low-noise preamplification to compensate feedline attenuation

How to use

Install the preamplifier as close to the antenna feedpoint as practical, securing it to the antenna structure or mast according to local mounting conditions. Connect the antenna output to the preamplifier input and run the coaxial cable from the preamplifier output toward the receiver or distribution system. Provide power to the preamplifier as required by your system's power-injector or masthead power supply; follow any manufacturer instructions for powering through the coax if supported. Verify connections are weatherproofed and ensure coaxial connectors are tightened to maintain low loss. After installation, adjust the antenna orientation and check signal levels at the receiver to confirm improved reception and optimal performance.

Usage recommendations

Use this preamplifier only when the antenna and installation require additional gain to overcome significant coaxial cable loss or when small signal levels are observed at the receiver. Avoid using excessive gain in environments with very strong local transmitters to prevent receiver overload; if strong signals are present, consider adding attenuation or a band-limiting filter. Ensure power supply method is compatible with your system and that outdoor connections are sealed against moisture to maintain reliable operation.