One thing you might want to ask is if the fan in the switching supply 
runs all the time.  I think it is stupid to design something that the 
fan runs all the time even when not needed as m f j does in their 
supply.  There was actually an article 3 or 4 years ago in q s t that 
told how to build a temperature control for the particular m f j supply 
I have.  I'm not good enough to solder on pc boards, so never got that 
done, but I don't use that supply much any how unless I go portable 
somewhere.  Maybe I just like lots of iron. hi hi.
73
Butch
WA0VJR
Node 3148
Wallace, ks.


On Thu, 3 Apr 2014, 
Dave Basden wrote:

> Thanks to all for your explanations and advice.  It sounds like the
> switching supply is adequate if it is of modern design, but the
> conventional supply is safer if the user is very cautious.  I'll have
> to decide how cautious I am!
>
> 73,
>
> Dave, W7OQ
>
>