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