These are Ultra miniature Core Type EI-1A, 75mW Max Output audio transformers.
SPECIFICATIONS
Impedance: Primary/ secondary 100Ω
Impedance variation: ±10% @ 1KHz
DC Resistance:
Primary 10.9Ω
Secondary 9.1Ω
D.C. resistance tolerance: ±15%
Breakdown voltage: 100VAC HIPOT for 1 minute
Maximum output: 75mW
Frequency response: ±3dB, 300Hz-3.4KHz @ 1KHz 0dB
WARNING
