Hammond 850GA Sealed 150/600 Ohm Line Isolation Transformer

The 850GA is a sealed 850A Series broadcast-quality transformer for line isolation or hybrid circuits. Primary and secondary are both a nominal 150/600 ohms, and both windings have a nominal resistance of 71 ohms (+/- 20%), giving a symmetrical 1:1 style unit for isolating 600 ohm class audio lines and breaking ground loops between equipment.

Across the series, frequency response is +/- 0.5 dB max. from 20 Hz to 20 kHz, insertion loss is approximately 1 dB, maximum power level is +15 dBm with the specified characteristics, and distortion is approximately 1.5% at 20 Hz under full power. The sealed case and internally wax potted core are intended for stable characteristics and long life.

An electrostatic shield between primary and secondary is connected to the green lead. Humbucking construction and balanced split windings on both sides add circuit versatility, and the primary may be used as the secondary and vice versa for impedance matching.

The case is deep-drawn steel with a tin plated finish, sealed, and fitted with two 6-32 mounting studs; mounting hardware is included. Leads are a minimum of 4" long. The listed overall dimensions are A 1.20 in (30 mm), B 1.70 in (43 mm), C 1.65 in (42 mm) and D 1.32 in (34 mm). The 850GA is RoHS and REACH compliant, with a listed shipping weight of 0.45 lbs (0.20 kg) and UNSPSC 39121301.