Highly Selective, Transistorized, Measures Wave Components Directly Advantages: No calibration or stabilization needed Direct readings; accurate Measures frequencies 20 cps to 50 KC Completely transistorized Battery or ac powered; hum free Low power consumption; no warmup needed Very sharp acceptance circuits AFC; also frequency restorer circuit Compact, rugged, versatile Oscillator-tuned voltmeter Uses: Measures and analyzes fundamentals, harmonics, and intermodulation products in telemetering, carrier and vibration systems as well as audio circuits. Speeds analysis of noise and broadcast amplifier characteristics; modulation amplifier, film sound track and recording distortion; hum, network characteristics, etc. Model 302A Wave Analyzer is a significant improvement in wave analyzer design. It obviates the need for tedious calibration procedures and stabilization before use, has sharp acceptance circuits, is completely solid state, compact and easy to operate. Other exceptional features are extremely narrow bandwidth, automatic frequency control, automatic tracking when used as an oscillator tuned-voltmeter, provision for battery operation (18 to 28 volts) as well as ac line power, and elimination of warmup time.