Ham Radio: Digital: WSJT-X: JT65 - Selecting your Transmit / Receive Frequency
У вашего броузера проблема в совместимости с HTML5
Very quick, short demo, about changing and manipulating your TX (transmit) and RX (receive) frequencies/tones while using WSJT-X during JT65 Operation.
The same principle applies for JT9.