On Oct 29, 1:21*pm, Highland Ham wrote:


However I fear that the main reason for the buzzing is that the
transformer (of US origin) was designed for 60 Hz ,whereas here in the
UK (like in all European countries ) the supply frequency is 50 Hz.
Can someone on this NG please confirm/reject my suspicion.

Another possible reason could be that the cabinet sheet metal which is
very close to the transformer is vibrating (transducer effect) .

TIA for any constructive advice/opinion

Frank * * GM0CSZ / KN6WH

I can confirm the 50/60Hz problem. Have been moving line powered
equipment (including microwave ovens, Astron P/S, and more - even real
Wahl hair clipper) between US/Canada and Europe for over 10 years and
found the increased level of buzz when running 60Hz eqpt on 50Hz in
practically all cases. My Astron P/S is just a 4A unit and the buzz is
bearable. Other stuff ranges from OK to loud like hell.

73,
Rich OK8RF/VE3FSF