6K6XFMR
600 ohm to 600 ohm audio coupling transformer, 1 to 1 ratio,

cat#  6K6XFMR

600 ohm to 600 ohm audio coupling transformer, 1 to 1 ratio.
Use two for sound card (PSK31) interface;
1 for Line IN/Mic IN
1 for Line Out/Spkr Out

OEM Xicon

Specifications:

• Impedance; 600 ohm to 600 ohm, 1:1
• Core type/size: EI-14
• Pri=55 ohm / Sec= 42 ohm 
• D.C. resistance tolerance: ±15%
• Impedance variation: ±10% @ 1KHz
• Insulation: >10MΩ @ 100VDC
• Breakdown voltage: 100VAC HIPOT for 1 minute
• Maximum output: 75mW
• Frequency response: ±3dB, 300Hz-3.4KHz @ 1KHz 0dB
• Waxing: vacuum treatment
• PC leads are soft metal wire and can be adjusted to fit a
variety of applications.