Soundcard Interfaces

A sound card interface is used for digital operating modes such as RTTY, PSK-31 and FT-8. The need for such a device results from the different or completely missing grounding of the computer and the radio. This results in potential differences which lead to equalizing currents and these in turn lead to a clearly audible hum on the modulation. A sound card interface breaks the galvanic connection between the computer and the radio and thus prevents equalizing currents and hum.


The sound card interface connects the AF inputs and outputs from the radio to the computer, offers PTT control and usually also a CAT interface (Computer Aided Tuning). The connection to the computer is usually always done via USB. More modern sound card interfaces have their own USB sound card integrated, otherwise the sound card built into the PC is used. An own sound card has many advantages, for example, because settings can be made separately for amateur radio applications. Ideally, the manufacturer of the interface should also offer suitable cables for as many different radios as possible. So you don't have to solder cables yourself. Properly configured, a universal sound card interface works with any software that uses the standard interfaces of a computer.

 

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    MicroHAM Inhibit-Cable Yaesu

    'Inhibit' Cable Yaesu

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  2. Rigblaster CAT-Cable FT-817/857/897
    Rigblaster CAT-Cable FT-817/857/897

    CAT Cable RigBlaster to Yaesu FT-817/857/897/100/100D

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    MFJ-5705D Audio cable

    For 5-Pin DIN Data / Accessory Port Connector, for use with MFJ-1204D5 interface

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    MFJ-5700KX3 Audio cable

    For the Elecraft KX3`s Mic and Phones jacks, for use with MFJ-1204KX3

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FAQ

What is a sound card interface for amateur radio?
A sound card interface for amateur radio is a device that allows a computer to be connected to a radio transceiver, enabling the transmission and reception of digital modulation methods such as PSK31, RTTY, and SSTV.
Why is a sound card interface needed?
A sound card interface is required to transmit and receive digital radio modulation methods such as PSK31, RTTY, and SSTV with a computer. This is especially important for amateur radio enthusiasts interested in digital radio modulation methods.
What requirements must be met to use a sound card interface?
In order to use a sound card interface, a computer must have a sound card that is compatible with the radio transceiver. Additionally, the proper drivers and functional software must be installed to allow for the transmission and reception of digital radio modulation methods.