I typically use a high uF cap that is rated at 70-80 volts DC. My current installation utilizes a 44,000 uF cap and all is quiet for my DC power needs when running off of the battery fed by a charger.
73, Eric W9WLW On Oct 6, 2012 5:36 PM, <[email protected]> wrote: > > Gents, > > My setup uses four ()4 12v batteries in parallel for powering my K3 and > SGC powercube amp that I float with a battery maintainer. > > I believe that I have an RF problem with the power setup. I have put > chokes in the power leads to the equipment but at certain times I can > hear the ferrites buzzing with either the digital code being sent of > matching my voice with SSB. The chokes are clamp on types. I am not > observing any RF problems or reported problems on the air. But I think > that something is not right as of yet so I want to go after it to make > my shack even better. > > It has been suggested to me by a ham on the air that batteries just pass > this thru as they have no filtering capability. His suggestion is to > but a bit CAP across the batteries to kill this phenomenon. > > So my question as I am not an EE by education is how would I properly > pick a CAP size and would different materials that CAPS are made out of > make any difference. > > It would be easy to go out and get a large CAP like used on car stereo > systems but I want to have a better shot of fixing it right than just > hacking away. > > As always thanks in advance for your help. > > ~73 > Don > KD8NNU > FH#4107 > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
