Hammond 144F 500CT to 3.2 Ohm Chassis Mount Output Audio Transformer

The 144F is an output audio transformer in the 143-146 Series with a 500 ohm center-tapped primary and a 3.2 ohm secondary. It is listed for output applications and fits chassis mounted audio designs driving 3.2 ohm loads from a 500 ohm CT stage.

The 144F is rated for 150 mW output with 6 mA primary D.C. current. D.C. resistance is 27 ohms primary and 0.33 ohms secondary, both +/- 15%.

Mechanically, the 144F 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 623980191805).