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A FUNDAMENTAL INSTRUMENT ...useful for measurements ranging from interelectrode capacitance of semiconductors to impedance of transformers weighing several tons. [[image]] * Wide Range-0.001Ω to 10 MΩ, 1 pf to 1000 μf, 1 μh to 1000 h; 0.02 to 1000 for Q at 1 kc, 0.001 to 50 for D at 1 kc. * Patented ORTHONULL* feature eliminates "sliding balance" - enables easy measurement of low-Q inductors and high-D capacitors. * C, R, and L measurement accuracy within ±1% (±5% for D and Q); accuracy holds over all ranges - not reduced at range extremes. * Unique "flip-tilt" cabinet serves as adjustable stand and doubles as protective carrying case. * Panel controls designed for operator convenience - switching arrangement and panel engraving make bridge operation self-explanatory. * Battery operator - completely self-contained; built-in transistorized 1-kc oscillator and null detector; single null indicating meter for both a-c and d-c measurements. Type 1650-A Impedance Bridge...$450 *U.S. Patent No. 2,872,639 Proven Accuracy * Day-In, Day-Out Dependability Completely Self Contained * Convenient Operation Write for Complete Information GENERAL RADIO COMPANY WEST CONCORD, MASSACHUSETTS NEW YORK, WOrth 4-2722 District Office in Ridgefield, N.J. WHitney 3-3140 CHICAGO Oak Park VIllage 8-9400 PHILADELPHIA Abington HAncock 4-7419 WASHINGTON, D.C. Silver Spring JUniper 5-1088 SAN FRANCISCO Los Altos WHitecliff 8-8233 LOS ANGELES Los Angeles HOllywood 9-6201 IN CANADA Toronto CHerry 6-2171