Hammond 149G 600 Ohm PCB Driver Audio Transformer, 200 mW Output

The 149G is a driver transformer with a 600 ohm primary and a 150/600 ohm secondary. The secondary offers both 150 and 600 ohm options, a practical choice for engineers working with common 600 and 150 ohm audio interfaces on a printed circuit board.

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 149G is rated for 200 mW output with a maximum primary D.C. current of 29 mA. D.C. resistance is 92 ohms on the primary and 58 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 150 or 600 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 149G is RoHS and REACH compliant, UPC 623980199306.