Hammond 149C 160:20/80 Ohm Driver Transformer, 200 mW PCB Mount

The 149C is the lowest-impedance driver in the 149 Series, pairing a 160 ohm primary with a 20/80 ohm secondary. It is intended for designers who need a board-mounted driver transformer between low impedance stages, and its 56 mA primary current rating is the highest among the series drivers.

The 149 Series uses an economical, open type, horizontal bracket construction with pin-type terminals for P.C. board mounting, and adds clinching lugs for extra mounting strength. Windings are bifilar wound for balanced capacitive and resistance characteristics on pin bobbins spaced for a standard 0.2" grid, and the series is insulation tested at 250V rms.

The 149C is rated for 200 mW output with a maximum primary D.C. current of 56 mA. D.C. resistance is 24 ohms on the primary and 7 ohms on the secondary (+/- 15%). Frequency response is 200 Hz to 15 kHz (+/- 1 dB, referenced at 1 kHz) and insertion loss is less than 1/2 dB, while total distortion is approximately 2% at 200 Hz for drivers, decreasing at higher frequencies. The split secondary gives a choice of 20 or 80 ohms, wired per schematic figure 2.

Net weight is 1.0 oz. and the listed shipping weight is 0.05 lbs (0.02 kg). The 149C is RoHS and REACH compliant, UPC 623980199009.