On Jan 17, 2008, at 8:16 AM, Stewart Rolfe wrote:
Hi all,
The enjoyment of my new K3 was being severely compromised by an old
linear power supply whose fan sounded like an old vacuum cleaner
and whose transformer buzzed loudly in time with my cw at any
powers above about 20 watts.
So I decided to take a chance on a switcher and bought the Alinco
DM-330MW on offer at the moment in RadCom for 79.95ukp (RSGB
members) until the end of February. What a difference.....the
silence is deafening! I can now hear the K3's dulcet sidetone and a
quick flick across the bands has not shown up any obvious switching
noise either.
It's small size and weight makes it an ideal companion to the K3
and the duo would make a great combo for a field day or dxpedition.
I'll reserve final judgement until I've used it a couple of weeks
and had a good check for digital nasties but it looks very good so
far.....
I have had my Alinco DM-330 for several years (it replaced an Astron
linear supply) and have been quite happy using it with my K2. The
adjustable output makes it easy to supply sufficient voltage for
charging the internal battery and I have never noticed any switching
noise. There was a review in QST which showed a much cleaner
spectrum than most of the other supplies they tested.
Bob Nielsen
[EMAIL PROTECTED]
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