----- Original Message ----- From: "drmail377" > > However, I would think a better parallel port interface would employ > opto-isolators. Opto-isolators will prevent a potential source of > ground loops.
All I do is break the loop. The I2C connections go from the interface but the return goes through the audio cable ground. Then connecting the LPT makes no difference to my waterfall. 73 Alan G4ZFQ
