"Mark" wrote in message
...
No, wait!!!

I have several Sony portables, but not the model you mention (7600D,
7600A,
2001D/2010, SW55). I (in New Zealand) also have the same Westminster
system
of power supply that you have in the UK, 240V phase-to-earth (415 volts
phase-to-phase), 50Hz. (I mention this because we have a
Mains-Earth-Neutral
setup, which USA does not, so other posters may be experiencing different
reasons for any interference or hum).

I use power supplies for all my radios, saves buying batteries all the
time.
Also, reception is better with the power supply hooked up (honestly, I
think
maybe I'm getting a better ground or something, but if you run on
batteries,
then plug in the power supply, the noise level drops).

One more point: some of my Sonys were supplied with a Sony power supply
and
some weren't. Don't bother buying a Sony power supply, they cost too much.
They will run perfectly well on a much cheaper multi-plug/multi-voltage
adapter you can buy quite cheaply. Never,ever had any noise problems.

Mark.

Hi
I have one of the type you mention (the multi-plug/volts etc) tried it out
on my Sony, but the hum was unbearable, That's why I thought the proper Sony
one might be better.
cheers
Alan