P
Poxy
- Jan 1, 1970
- 0
The subject says it all - is this something that is often/ever done?
Poxy said:The subject says it all - is this something that is often/ever done?
Poxy said:The subject says it all - is this something that is often/ever done?
Way back yonder when Flintstone was just a slip of a lad, the TV aerials hadBrian Goldsmith said:The subject says it all - is this something that is often/ever done?
**** I have never seen any TV antenna fitted with a non translucent
cover.Then again I really dont understand why you want to keep the light
away from the antenna!!!!
Brian Goldsmith.
For coax, a 90V GDT (gas discharge tube) between the inner and outerPoxy said:The subject says it all - is this something that is often/ever done?
I used Polyphaser (I think) protection devices on an array of HF antenna nearThe subject says it all - is this something that is often/ever done?
The paranoid disconnect the cable from the wall.
Dave
That's from the lightening hitting his power supply not the aerial. Most
lightening hits come from the power supply, being hit on your aerial is very
unlikely.
Bodgey said:That's from the lightening hitting his power supply not the aerial. Most
lightening hits come from the power supply, being hit on your aerial is
very
unlikely.
Richard Freeman said:That is actually about as incorrect as you can get.
In fact most Lightning damage comes from sources other than Lightning
strikes to MEN mains.
ie:
Phone Lines (yes even underground ones)
Aerials
and direct strikes to houses
Michael A. Terrell said:Really? Why did I find pieces of my TV antenna more than 150 feet
from the mast after it exploded from a lightning strike?
strike burnt open the underground phone line for more than a mile out to
the highway where it destroyed the electronics in the phone companies
pedestal?
connected when lightning hit the antenna. Over $2000 dollars worth of
damage including battery powered items that had IC chips explode from
the EMP.
That is actually about as incorrect as you can get.
In fact most Lightning damage comes from sources other than Lightning
strikes to MEN mains.
ie:
Phone Lines (yes even underground ones)
Aerials
and direct strikes to houses
Franc said:Hmmm, that seems counterintuitive. I would have thought that a strike
on the mains would affect several households and would take out
expensive appliances. OTOH, a strike on the phone line may take out
your phone or your modem, but not much else. Strikes on aerials would
also be localised events.
Franc Zabkar said:Hmmm, that seems counterintuitive. I would have thought that a strike
on the mains would affect several households and would take out
expensive appliances.
OTOH, a strike on the phone line may take out
your phone or your modem, but not much else.
Strikes on aerials would
also be localised events.
Bazil said:Not at all. While that does happen, when lightning enters phone lines,
look out. I saw two very dead and burnt motherboards that were connected
via modem to the phone lines. One was actually warped and twisted from the
heat. The strike was half a k up the road and just like Richard mentioned,
entered the phone lines through the ground. I don't know why mains strikes
seem to have a smaller radius of damage (maybe all the neutral grounding?
maybe the higher load presented by all the connected appliances? higher
capacitance? probably all of above),
but it has always been said to disconnect your modems during electrical
storms.
Of course the reality is that a strike is going to cause damage to
whatever it hits. It's just where it goes and via what medium after that.