Counterpoise | Information by Electrical Professionals for Electrical . . . Counterpoise is an effective means of reducing the impedance to ground presented to a lightning strike in areas where high soil resistivity and rocky ground prevent conventional grounding Fundamentally, counterpoise, which should be considered an alternative to other methods of grounding, is a leaky transmission line that is intentionally
Counterpoise System and Grounding for Airfield At the manhole structure, the counterpoise and manhole (including all metallic parts and ground bus) is bonded to three ground rods installed around the perimeter of the structure This type of grounding is performed to airfield lighting, power (all voltages) and communication systems
Counterpoise vs triode | Information by Electrical Professionals for . . . Re: Counterpoise vs triode I found some of my old papers A triode for building ground is three rods over ten feet apart, bonded together, and installed at each building corner A counterpoise ground is a ground ring, with multiple rods The applied math indicates the triode is of lower impedance, but that is dependant on soil conditions
JPC-12 | Page 2 | QRZ Forums I did buy a counterpoise plate with 8 thumbscrews for the PAC-12, but have not found the need to try it I get a good match on the bands I tried, 20 and 40 meters For the size of the antenna I feel it has worked well with only 20 watts from mg G90
Ground Wires and MV Ductbanks - Mike Holts Forum Thanks for the offerings But I don't think we have it yet The only things to which the 4 0 is bonded are the ground wires that are installed on the inside walls of any manholes or vaults that are along the MV ductbank's route
How to cut and tune EFHW antenna for 10 - 40 | Page 2 - QRZ Forums Many ops don't use a counterpoise with a half wave end fed antenna I happen to be one At exactly 1 2 wave, the theoretical impedence is infinity, along with the voltage So I use a short tail counterpoise and choke just to move the high voltage away from the feed point a bit making it an "extreme off center fed half wave antenna"
How to cut and tune EFHW antenna for 10 - 40 - QRZ Forums Good luck with your build and effort to experiment and share your results I have built the exact antenna, and had many problems with the spliced ends coming apart from over stretching, wind etc Sure it is resonate once you get it slung up, but SWR will go way up if it comes apart and you transmit on a different length of antenna than you intended to you
How to Calculate Multiple Banded End Fed Half Wave (EFHW) A counterpoise wire extends the effective length of an end-fed antenna to do this Remember that an "End-Fed" wire antenna is in reality a "nearly end fed" or "very off-center fed" antenna (usually the equivalent of a dipole at its resonant frequency) and its end impedance is not infinite, as truely "end-fed" would imply
How to Calculate Multiple Banded End Fed Half Wave (EFHW) A half wave is, well, a halfwave, for a given band Feeding it at the end is a high voltage point, which requires a matching unit--usually a toroidal ferrite system nowadays at the end-feed--and incurs losses
Ground Loop or Couterpoise Required for Pad Mounted Tran My colleague suggested that I need a ground loop or counterpoise installed for my pad mounted 3phase, 300KVA, Delta-Wye connected, 208 120 volts, 12,460 volts primary transformer I have a ground rod installed now which obviously goes in to the ground (I believe it is 10feet)and this is what I have seen done by a previous contractor's design