Consider that the old BOATANCHOR rigs were made at a time before the current 3 wire power distribution system. They were not connected to ground through the power wiring. And it was not necessary to connect them to a ground. A dipole antenna really does not require a ground. If you are getting noise int your receiver try running with ground isolator adapter. That should tell you if the noise is coming in on the ground.
I live in a retirement apartment complex. We have some kind of orange arc lamps in the courtyard that really make a mess of 75M. There is nothing I can do about them. And guess waht? They are only on at night. In addition to that, 90% of the new electronics seems to have a micro computer in it. Every one of these things generates RFI! That plus my TWO computers, 3 printers, and scanner! At least I have one switch that kills the entire computer system! Bob Macklin K5MYJ Seattle, Wa, "Real Radios Glow in the Dark" ----- Original Message ----- From: <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" <amradio@mailman.qth.net> Sent: Monday, November 05, 2007 1:11 PM Subject: Re: [AMRadio] Station Grounding > "Bob Macklin" writes: > > >What is the concern with the grounding? Is it noise reduction or better > >antenna perfomance? > <snip> > > Hello, > Antenna performance is not the issue. The coax fed dipole > is resonant at the 75 mtr AM area. Some RF in the shack is inevitable with the dipole about 20ft over my head. Not an issue. > What I am concerned with is the advisability of seperating the house earth from the station (RF) earth. > With heating season here the oil burner for the first floor business has a new solid state high voltage ignitor that generates considerable phase control noise visable on the AC line and this happens to have serious harmonic content with an almost complete wipeout of the 3875-3890 portion of that band. > I do not know if the building ground is even still properly connected to a good earth point. It's not my building. > So, with this said I feel that there is the possibility that the house earth conection is useless and would like to use a (clean) earth for the entire station power along with some filtering as appropriate. > I have been in the live sound business for at least 30 years and floating certain grounds for loop and noise elimination has often been necessary but not really code. > > Anyway, that is the story. A noise and safety issue rather than RF/Antenna. > > 73, > Bill, KB3DKS/1 > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
