I have an old clock radio that works fine, except for one detail. The clock is made for 60 hz mains but I would like to use it in a country where 50 hz is the standard. As the clock directly relies on the mains frequency to keep track of time, it slows down when used with 50 hz mains power, making it useless as a clock.

Is it likely that it is possible to modify the clock to work with 50 hz mains power? The clock radio is a Panasonic RC-6030. I have not been able to dig up schematics for it.

  • \$\begingroup\$ You should open it and take some pictures, but I think such a modification is not simple, nor it is worth the time/effort/money, unless you like the radio for a particular motivation and/or you want to mess with it a bit. \$\endgroup\$ Commented Jan 11, 2015 at 22:17
  • 3
    \$\begingroup\$ If it uses the popular LM8560 chip then you can use pin 26 to select 50Hz operation. \$\endgroup\$
    – Majenko
    Commented Jan 11, 2015 at 22:33
  • \$\begingroup\$ You may need to change the primary clock chip. It would probably be cheaper and easier to get a new clock. \$\endgroup\$ Commented Jan 11, 2015 at 22:33

1 Answer 1


In a word, no. It's a mechanical flip-digit clock, which means it uses a synchronous motor to operate the clock mechanism. The gear train that selects 50 Hz vs. 60 Hz operation is sealed inside the motor, so you have to replace the entire motor in order to change it. It just isn't worth the effort or expense.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.