Hammond 144I 600CT to 150CT Ohm Chassis Output Audio Transformer

The 144I is a 143-146 Series output transformer with center taps on both windings: a 600 ohm CT primary and a 150 ohm CT secondary. It is listed for output applications and follows schematic 4 in the series table, suiting chassis mounted designs that need a center-tapped secondary.

The 144I is rated for 150 mW output with 6 mA primary D.C. current. D.C. resistance is 45 ohms primary and 8.2 ohms secondary, both +/- 15%.

Mechanically, the 144I 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 4 in the series table and is listed as RoHS and REACH compliant (UPC 623980192109).