Is there any way of knowing whether a R4-B mains transformer
is designed for 60Hz or 50Hz ?
I got mine from a German radio-amateur decades ago...
It has the IC audio amp.
Michael 2E0IHW
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On 24/11/2023 20:55, nigel patterson G3YDT wrote:
...
one reason why I am sensitive to the voltage is that our UK mains is 50Hz, so the transformer gets hotter.
