Hammond 144B 200CT to 3.2 Ohm Chassis Mount Output Audio Transformer

The 144B is an output audio transformer in the 143-146 Series with a 200 ohm center-tapped primary and a 3.2 ohm secondary. It is listed for output applications and is the lowest primary impedance output part in the 144 group, suited to builders of chassis mounted audio equipment driving 3.2 ohm loads.

The 144B is rated for 150 mW output and 10 mA of primary D.C. current. D.C. resistance is 10 ohms on the primary, and the series table lists the secondary D.C. resistance as 0 ohms (+/- 15%).

Mechanically, the 144B is a small, economical open type transformer with a two hole horizontal bracket for chassis mounting and overall dimensions of A 1.26 in (32 mm), B 0.69 in (18 mm), C 0.69 in (18 mm) and D 1.06 in (27 mm). It uses insulated, color coded flexible leads at least 4" long, and net weight is 0.5 oz. Where a P.C. board mounted version of this style is needed, the manufacturer refers to the 148 and 149 series.

Frequency response is 150 Hz to 15 kHz within +/- 1 dB, referenced to 1000 Hz. The manufacturer notes that operating at impedances below nominal lowers power capability and frequency spectrum proportionately, while higher impedances raise them. It follows schematic 3 in the series table and is listed as RoHS and REACH compliant (UPC 623980191607).