[Elecraft] Capicator Size for filtering across battery power

[Jim Brown]

On 10/8/2012 5:18 PM, KD8NNU wrote:
> So my options as I understand them are to put a large cap like the car
> stereo guys do across the batteries.

NO!  I listed four good options, all of which cost a lot less than that 
large cap.  Why is it that folks gravitate toward the option that 
involves BUYING a solution when the best solutions are often nothing 
more than simple wring?

And, as has been noted, the cap, if you choose to use it, goes AT THE 
RIG with zero length leads, NOT at the battery.

On 10/8/2012 2:24 PM, Mel Farrer wrote:
> On point 2)  I would rather power the accessories on the battery end 
> of the rig power cord as the voltage regulation will not have the rig 
> IR losses.

That's OK -- IF you do the chassis bonding noted. Or if you waste money 
on a big cap.  I put a big cap across the K3 power terminals ONLY as a 
test to prove that what I was hearing was that modulated IR drop, not as 
a solution.  Simple bonding requires nothing more than a few feet of 
wire, works just as well, and is a lot cheaper.

73, Jim K9YC