Electrical characteristics:
Winding ratio:6.3+6.3:1+1
DC resistance (ohms +/-15%):
Primaries:10.3 + 10.3 Secondaries: 0.37 + 0.37
Impedance: primaries: 150 ohms + 150 ohms
secondaries: 3.75 ohms + 3.75 ohms
Inductance, measured at 1kHz, 0.27V
(series equivalent circuit):
Primary: 100mH + 100mH (nominal)
Secondary: 2.5mH + 2.5mH (nominal)
Proof voltage: primaries to screen: 1kVrms
screen to secondaries: 1kV rms
Frequency range: 30Hz - 35kHz +/-1.5dB.
Power: 100mW @ 300Hz and 1mW @ 30Hz
Distortion: less than 1% T.H.D. 600 ohms 30Hz - 35kHz
measured at OdBm
Operating temperature range: 0 to +70°C
Storage temperature range: -25°C to + 120°C
N.B. Do not pass DC through the windings

Materials: all materials are UL94V-0 rated
Bobbin and box material: FR530
UL file number: E69578(M)
or 'Polyplastics Co. Ltd
Material name: 1140 A(C)
UL file no. E109088(M)
2-part epoxy resin type 3300A and 3300B
UL file number 218090
or Epoxylite EIP4728: UL file no. E143115
Core: class B (49% Ni) EE laminations
Winding wire: ECW. ÚL file no. E174837
Tape:3M No. 56 polyester or equivalent