[Elecraft] Local Noise Problem

[Jim Brown]

On 4/3/2011 10:12 AM, AB8XA wrote:
> The sub-panel will also have a 30 amp circuit to my "shack," feeding a 24 VDC to 13.8 VDC converter for full nominal voltage to our 100 watt rig. There are many advantages to 24 VDC over 12 VDC in residential use.

Yes, BUT -- that 24VDC to 12VDC converter is almost certainly some sort 
of switching power supply, and you will need to carefully search to find 
one that is not a source of RF noise..  AND the conductors are going to 
need to be pretty large, because they're carrying a 10A load (at 24V) 
just to run your 100W rig.  Multiply that current (and copper) by about 
9X if you also want to run a 500W amp. And the only one I know of that 
runs on 13.8V is the Ten Tec Hercules II, a very nice amp that's been 
out of production for about 20 years.

73, Jim K9YC