On 10/6/2012 5:15 PM, [email protected] wrote: > 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. That is interesting. I suspect that they are reacting to the elecromagnetic field created by rapid current fluctuations in the DC lines rather than picking up RF. RF would be far to high a frequency to cause a ferrite to audibly buzz or rattle.
I too run batteries on my K3 when I am at the cabin. and cant say that I am aware of ever suspected RF issues in the DC power system other than with the charger which is horrible for noise on the reciever and any attempts to tame it have failed so I just disconnect it when I'm on the air. As far as RF in the power system if it really is a problem I would put a small cap across the input terminals to the rig. for RF id say .01mf ceramic disk. if you are attempting to filter ripple from a generator or charger which is not an RF issue I would first connect the charger as close if not directly to the battery terminals. then add a large say 50000 mf 16 to 20V capacitor near the power terminals at the rig. this will filter ripple but wont filter RF well so add to it a small .01mf ceramic capacitor for any RF. > I am not > observing any RF problems or reported problems on the air. If you are not having any issues than I wouldn't worry about it. RF issues in the power source like batteries are not often a problem so long as things are wired and grounded properly 73 Dave ______________________________________________________________ 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
