Operating Modes and Power Ranges A. Transmitter must support FM-only operation. B. It must be frequency agile from 87.5 to 108 MHz without tuning or component changes. C. Nominal output power: 3,000 watts D. Power ranges must include: a. Analog FM Range: 30 to 3,300 watts b. Adjustable in smaller steps for fine-tuning Efficiency (AC to RF) A. Minimum efficiency at 3,000 watts: 74% typical B. Bidders must provide manufacturer’s efficiency ratings across listed power classes. Output Connector and Impedance A. Output impedance: 50 ohms B. Output connector: 7/16 DIN or ⅞” EIA unflanged (for 3,000 - 2,500W class) a. With automatic foldback and return for high VSWR or thermal overload conditions Mechanical Specifications A. Standard 19” rackmount width B. Max Dimensions at 3,000W: a. Height: 3 RU / 5.19 in. (131.8 mm) b. Depth: 20 in. (508 mm) c. Weight: 49.6 lbs. (22 kg) Power Input and Environmental A. Power input: Single Phase, 180–277VAC, 50/60Hz B. Operating ambient: 0°C to +45°C C. Altitude rating: Up to 10,000 ft (derate 2°C per 1,000 ft) D. Power factor: ≥ 0.99
