Untested unit. Selling for parts or repair. The Precision Electronics Model 201 (often associated with Grommes-Precision) is a vintage, multi-function electronic test instrument used to troubleshoot radio, television, and audio equipment. It operates by tracing RF/IF and audio signals stage-by-stage through a circuit so you can isolate where a signal drops out.Key Features and Capabilities:Signal Tracing Modes: Includes separate inputs and cables for RF (Radio Frequency) and AF (Audio Frequency) tracing. The RF tracer employs a built-in diode detector to demodulate high-frequency signals, while the AF tracer utilizes a multi-stage preamplifier.Dual Monitoring Indicators: Uses both an electron-ray "eye" tube and a built-in 5-inch speaker for visual and audible signal verification.Component Substitution: Features built-in jacks on the front panel to let you substitute the tracer's internal speaker or transformer for external circuit testing.Noise and Wattage Testing: Includes a special position on the function selector for noise testing, plus a calibrated watts control on the front