[Elecraft] KPA500 Noise While Off

[Jim Brown]

On 6/27/2018 1:33 PM, Bob McGraw K4TAX wrote:
> This would give a clue if further line conditioning would be advantageous.

I'm certain that some charlatan preying on high futility nuts would be 
quite happy to lighten his bank account by at least as much as he paid 
for the KPA500. These products provide no benefit to audio consumers, 
and they would provide no benefit in a ham station. Their only function 
is to transfer money from the buyer to the seller.

None of what's being discussed here should be a problem, and the easiest 
ways to minimize the symptoms are 1) to simply beef up the wiring 
between the power amp and the distro panel, or 2) shorten the wiring, or 
3) provide a breaker dedicated to the shack. A single 15A circuit should 
run all the RADIO equipment in the shack where the power amp is a 
KPA500. Obviously, a 20A circuit provides more margin, bigger copper and 
shorter copper reduce IR drop.

For the printer, as others have noted, the IR drop between it and the 
breaker panel for the turn-on surge, so bigger copper for that part of 
the run would also have to be replaced.

And yes, a solar array syncing could easily be the cause of that 
9AM-10AM event reported by NW6V.

73, Jim K9YC