[Elecraft] Which PS for K2/100, linear or switcher?

[Bob Nielsen]

On Feb 27, 2006, at 8:56 AM, Craig Rairdin wrote:

>> The advantages of the switchers are:  physically lighter and smaller,
>> smaller or no magnetic field.  Disadvantage: possible electrical  
>> noise
>> generation.
>
>> Many people will tell you that such-and-such a switcher is totally
>> quiet.  This seems to vary by particular unit.
>
> My Alinco DM-330MV (32 Amp) switcher sits right next to my K2 and  
> works
> fine. Do I just not know what to listen for? What should this ps  
> sound like?
> This particular model allows me to adjust the noise frequency to  
> move it out
> of the way if necessary. I've twisted that knob from one stop to  
> the other
> and I don't hear any difference on the K2.
>
> Craig
> NZ0R
> K1 #1966
> K2/100 #4941


I have the same model and it really is that quiet.  I bought it to  
replace my Astron RS-20 which wouldn't quite handle the current drawn  
by my TS-570D at full power (the K2/100 draws quite a bit less than  
the Kenwood, however).  Running a comparison with my K2 between a  
linear supply and the Alinco doesn't show any difference in noise,  
birdies, etc., as far as I can tell.

Bob, N7XY
K2 #3273