Monday, May 5, 2008

GROUNDING



BROADCAST AND SOME SERIOUS HAMs design their station which include provisions to keep the station on the air even during lightning storms so some station are design 24x7x365 even in the face of lightning. You may spend a thousand of Ringgit on your tower, antenna and your rigs but dont forget to put a side some $$$ for your earthing system get some advice from a good electrician and engineer......











































Ground Rod use at least 2x6 feet copper rod (suggestion cover the earth clamp with high tension tape to protect from water)









Look At the Ground Rod Connection....


My Advice is get 2 nos of 6' copper rod use at least 4mm2 electrical cable the bigger the better I used 6mm2 PVC cable and go through the brick wall and into my shack. The most important things is the cable connection at the ground rod if you just connect it by using the clamp supplied i would tell you that kind of joints cannot last long...it will oxydize. The best method is using exotomic weld which most of us cannot afford it. Second method is by drilling a hole and using stainless steel bolts and nuts. Third method using stainless steel hose clamp and clamp the cable using the Hose Clamp. And after you have finished it don't forget to used High Tension Tape to cover  the joints that you have done. 



Check your impedance with this instrument
the reading should be less than 10 ohm






Some might suggest to do grounding like this..using RG 8 or RG 213.for your radio....







1" Copper Tape attached to ground rod









Control Box....












































Don't foget your tower or your mast need to be ground also....

1 comment:

  1. Boy, this is one of the most comprehensive nuts and bolts presentation I've seen on grounding for lightning protection. What's nice about it is that you put all in one place, the entire continuum of options, from ultimate to ham-practical. Please write me; I'll follow you! Bill K1WMT

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