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ups.com: Greetings, To be honest, I'm a little embarrassed to even be posting this question. I've been a ham for over 10 years, but I've been out of the hobby for the past several and I'll freely admit that I'm one of those "memorize the multiple choice" people. Anyway, times have changed and I now own a house, and an HF rig, and have moved far from my roots. I want to get an HF station together, but I find the prospect of building/raising an antenna and putting together a grounding system a daunting task. So here's my question. Is it ok to have multiple shallow grounding rods versus one longer grounding rod? For example, what's the difference between 2 four foot rods versus 1 eight foot rod? Also, I'd like to describe my potential station set up, as I strongly suspect that it is not ideal, and I'd like any suggestions from the elmering crowd. It's on the 2nd floor of my home, over the garage. The power, cable, and phone connections are on the opposite side of the house, and there is no way to directly go under the house to get there (at least from outside the house). The home is nearly brand new (less than one year old). I should also mention that I have an unnatural fear of putting holes in the house, but I suppose I'll have to get over that in order to get on the air ;-). Thanks in advance and 73! Dan, W4XJF Hi Dan: I want to follow on what some of the other have said. First to only reason to have an RF ground in you shack is if you are going to use an antenna that brings part of the antenna that is supposed to radiate RF into the shack, as an example, a long wire antenna. Dipoles, beams and verticals that are feed with coax do not need RF grounds in the shack. Anyway making a RF ground in a second floor shack is a hard job. You do need a ground for lighting and static charge protection. For information on how to do that the Polyphaser web site is a good place to go. The basics are at least one 8’ ground rod as close to the shack as physically possible. More ground rods are better. Using shorter ground rods requires the use of more of them. In all cases more ground rods, properly installed the better. The ground rods should be connected together, if more than one is used, and to the shack with at least a #6 solid copper wire. You can bring it in to the shack anyway that is convent. Also national electrical code requires that all grounds to connect to the house ground (green wire ground) also. There is already a ground rod connecting your fuse panel to earth ground and your lighting protection ground must be connected to this ground via at least a #6 sold copper wire. The problem with RF ground and second story shacks is the length of wire will be too long the reach the earth and will act more as an antenna than a ground. Hope this helps. 73 John Passaneau W3JXP |
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