Transformer measures approximately one half inch by one half inch. Used in PSK31 transceiver to sound-card interface, this shielded, twin cable has two, 3.5mm stereo connectors on one end. NOTE that a large ferrite core is molded into the line near the sound card end of the cable. This is another means of preventing noise and RF feedback between the transceiver and the PC sound card. The audio transformers shown above have center-taps on both the primary and secondary windings.
All wires are color coded for easy signal routing.
Also a very popular TNC interface connector to PacComm, MFJ, and AEA TNC, radio ports. This is the cable for your TNC to Radio interface, or when interfacing the PSK31 or SSTV sound card to transceiver. The cable is 3 feet long, and has a 5 pin DIN connector already installed on one end. All wires are color coded for easy signal routing. Other radios have similar ports.