Hammond 102J 6000:2000 Ohm CT Interstage PCB Audio Transformer

The 102J is a miniature interstage audio transformer in the 102 Series, stepping a 6000 ohm primary down to a 2000 ohm center-tapped secondary. It suits P.C. board amplifier designs that couple a higher-impedance stage into a balanced following stage.

Center-tapped units in this series use a bifilar winding technique, which gives balanced resistive and capacitive characteristics on the split secondary. Rugged black epoxy potting encloses everything in a completely sealed unit. Mounting is by square pins, 0.025 in square typical, and where a connection is not used no pin exists. The 102J follows drawing figure 2.

Key ratings:

• Maximum primary DC: 2.8 mA
• DC resistance: 900 ohms primary, 260 ohms secondary, +/- 15%
• Output: 20 mW
• Insertion loss: 1.5 dB
• Low frequency roll-off: 310 Hz at -1 dB
• Peak working voltage: 100 V

Identifiers include UPC 623980179308 and UNSPSC 39121301. The part is RoHS and REACH compliant and ships at 0.02 lbs (0.01 kg). Compared with the 102K, which shares the 2000 ohm CT secondary, the 102J has a lower 6000 ohm primary and allows more primary DC (2.8 mA versus 2.5 mA).