Hi all, Today I test my digital board with Arduino ver 0.02( original) and 2k2 pull up res on pin 26(Fn sw) , all work fine Function sw also working ok . > but then I found that Function sw is stop working. and after some checking of voltage level I find that whenever tuning voltage is between 2.24 V and 2.76 V Function sw working ok ,if this voltage is below or above this level Fn sw stop working > Also in my digital board down tuning starts at 2.15V and up tuning starts at 2.95V so if one can set tune voltage between 2.15 to 2.24V or between 2.76 to 2.95 than tuning remains steady( fix) but function sw will not work > I think in the code there is something that stop function sw when scanning is in progress > Ashok Khachar / vu2kyz