You need a protection device at the house on those lines and also one on the power line feeding the device grounded to the same ground connection. 73 Gary K4FMX ______________________________________
And why don't they run into tall trees the same way?? 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@co
Keeping a constant space between the bar and the mast may be a problem as the mast moves with wind etc. But the bigger problem is that the voltage across the gap needs to rise high enough for an arc
What frequency are you receiving it on 80 meters? 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contes
A heavy wire or strap from mast to tower is best. You want a low resistance ground. A wiper, spark gap etc. all have enough resistance to let current thru the rotor. 73 Gary K4FMX ___________________
Well, after all that "authoritive" reporting I don't think anyone should ever worry about lightning damaging anything on a tower again. Why spend the time to bypass or ground anything. If no authorit
First, happy anniversary Cam! As to running a copper cable from the top of the tower down to ground it is really a waste of copper. The tower itself has much lower inductance than the wire will have
I recently got a quote from one of the listed rotor repair guys for some parts to repair a T2X. I asked for prices on the ring gear, main spur gear, gear plate, gear set, lower gear shaft support, br
The book "grounds for lightning protection" from polyphaser has those examples and formulas in it. They tell you how to estimate how much voltage will appear in different parts of the system. You ca
The industry standard for protection device comparisons is a waveform of 8x20 microseconds. You want to see how much energy is let through with a given size strike with that wave form. If they don't
At that point I would run inside as a nearby lightning strike is imminent! 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk mai
They also sold a couple to the FAA for testing. I have a video tape of the device exploding and spreading shrapnel everywhere as it took a direct strike. 73 Gary K4FMX ______________________________
Motorola used pl-259 connectors for many years on their UHF equipment. 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk mailing
The idea is to try and keep all voltages at the same level so as not to have anything arcing as in between the cable and the tower. Further to that, grounding the coax at the very bottom of the towe
I would get that one wrong. There is no need to bond those rods together. It serves no purpose other than to waste wire. The reason is that the potential coming from the tower will be the same on ea
The way Dick describes installing connectors is the correct way to do it. Very nice Dick! I might add that with some of those not so well plated connectors you might try some liquid or paste flux app
Jim is correct. A well designed lightning ground will also make an excellent RF ground for a vertical antenna. If it will not serve as an RF ground then it is not an adequate lightning ground either
Hi Don, Lightning peaks around 1 MHz but extends well into VHF. A 160 meter ground system will take care of the bulk of it. In some types of soils placing ground rods on the radials has shown some i
No they are NOT two totally different things! Please note that I did NOT say that a good RF ground (such as elevated radials) would necessarily make a good lightning ground. A good RF ground has the
Good morning Phil, It might but no "a" and "b" in this formula. :>) 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk mailing li