Hammond 107P 10K:1.5K Ohm Center-Tapped Miniature Audio Transformer

The 107P is a 107 Series miniature audio transformer with a 10K ohm centre-tapped primary (pins 1-3) and a 1.5K ohm centre-tapped secondary (pins 4-6), a 2.58:1 turns ratio. It is intended for audio input, line matching, isolation or output use between a high-impedance source and a 1500 ohm circuit on a PC board.

It handles 150mw from 150 Hz. to 50 Khz. and covers 150 Hz. to 80 Khz. +/- 1.5db at +0, +10 and +20 dbm without D.C. saturation; the frequency response is ±1.5db from 300Hz to 50KHz. Typical DCR is 700 ohms primary (400/300 ohms) and 122 ohms secondary (61/61 ohms), versus table values of 680 and 150 ohms (+/- 20%). At 1.0 kHz, 1.0 V the primary measures 14.5 Hy and 57.3 K ohms, and the secondary 2.45 Hy and 9.40 K ohms. Maximum D.C. unbalance is 1.5 mA and dielectric strength 100 Vrms.

Every 107 Series unit is epoxy potted in an attractive black molded case, and the rugged potting produces a completely sealed part that withstands severe environmental conditions. It will withstand soldering for 10 sec. at 260 degrees C, with a maximum ambient temperature of 85 degrees C; the casting epoxy has a workable range of -40°C to +105°C under a normal rate of change, not including thermal shock. The drawing notes primary and secondary may be exchanged.

It mounts on a PC board with pin-type terminals of min. 0.187" length and is RoHS and REACH compliant, with a shipping weight of 0.02 lbs (0.01 kg).