Galaxy DX Radios DX11B
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Roger Beep Tone Mod

The tone and time of the roger beep on the DX77HML can be changed as follows:

The roger beep tone is controlled by R181 which is 220K ohms:
for a higher tone try 150K to 200K ohms for a lower tone try 270K to 2M ohms

The roger beep time is controlled by C134 which is 2.2uF@16V DC:
for longer time try 5uF or 10uF@16V DC for shorter time try 1uF@16V DC

 

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we cannot guarantee that the instructions will work on every radio presented.