Amplifier Research LN1500

The Amplifier Research LN1500 is a solid-state, low-noise preamplifier engineered to amplify weak RF signals across the UHF spectrum. Delivering +10 dBm output with 30 dB minimum gain and 3.8 dB typical noise figure, it bridges low-level signal sources to power amplifiers or receivers requiring enhanced sensitivity. The unit maintains ±1.5 dB gain flatness across its operating band, with harmonic distortion held to –20 dBc at rated output.

Its 50 ohm input and output impedances tolerate any load condition without oscillation, fold-back, or damage. The LN1500 faithfully preserves AM, FM, and pulse modulation on input signals. Auto-ranging 100–240 VAC primary power with IEC 320 connector simplifies field deployment.

Offered in benchtop cabinet or rack-mount configurations with front or rear RF connectors.

Technical Specifications

• Frequency Response: 1 MHz to 1500 MHz


• Power Output: +10 dBm at <1 dB gain compression


• Gain: 30 dB minimum; ±1.5 dB flatness


• Noise Figure: 3.8 dB typical


• Input for Rated Output: –19 dBm maximum


• Input Impedance: 50 ohms, VSWR 2.5:1 max


• Output Impedance: 50 ohms, VSWR 2.0:1 max


• Harmonic Distortion: –20 dBc max at +10 dBm output


• Third Order Intercept Point: +20 dBm typical


• Modulation Support: AM, FM, pulse modulation

Key Features

• Mismatch-tolerant design operates at 100% load/source impedance mismatch without damage or oscillation


• Auto-ranging internal power supply accommodates 100–240 VAC, 50/60 Hz input


• Benchtop cabinet (26.0 × 11.7 × 21.6 cm; 4.5 kg) or rack-mount option


• RF connectors configurable on front or rear panel

Typical Applications

• EMC testing signal conditioning


• Communication system receiver sensitivity enhancement


• Low-level RF source amplification


• Laboratory signal generation and control

Compatibility & Integration Operates across 5°C to 40°C ambient with relative humidity to 80% (derated to 50% at 40°C). Altitude rating to 2000 meters. CISPR compliant. Mains supply voltage fluctuations must not exceed ±10% of nominal.