Hi all

snip

It would be really evil if the electronics started sensing the line
frequency and refused to operate on, e.g., 50Hz if the product were destined
for a 60Hz country.

---Joel Kolstad


ISTR reading that one (US-based) high-end audio manufacturer had done
just that - and designed a 60hz sensing circuit into their hi-fi amp.

This was then causing considerable grief and righteous indignation
amongst people where 50hz was used - said manufacturer was charging
many pennies for a 'service kit' that allowed the box to run on 50Hz
mains.....

Strange that any designer shoud go to such trouble to limit their
market....?

Adrian
Suffolk UK

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