Antennas And Lightning Induced Voltage Transients
 

Hello:

We get a lot of lightning strikes around here, and was wondering about this:

Presently have a receive-only random length wire running around the inside
of my attic.

Guess I'm not really too worried about "direct" lightning strikes; if there
is one I imagine I have a lot more to worry about than the radio.

But, does the roof provide any protection from nearby lightning strikes
inducing a high transient voltage
into the indoor attic antenna wire, as compared to if I had the wire antenna
strung outside the house ?
Again, from an induced voltage standpoint concern.

Or, is the fact that it is indoors really meaningless ?


Thanks,
Bob

Antennas And Lightning Induced Voltage Transients
 

MEANINGLESS !!

Robert11 wrote:
Hello:

We get a lot of lightning strikes around here, and was wondering about this:

Presently have a receive-only random length wire running around the inside
of my attic.

Guess I'm not really too worried about "direct" lightning strikes; if there
is one I imagine I have a lot more to worry about than the radio.

But, does the roof provide any protection from nearby lightning strikes
inducing a high transient voltage
into the indoor attic antenna wire, as compared to if I had the wire antenna
strung outside the house ?
Again, from an induced voltage standpoint concern.

Or, is the fact that it is indoors really meaningless ?


Thanks,
Bob

Antennas And Lightning Induced Voltage Transients
 

"Robert11" wrote in message
. ..
Hello:

We get a lot of lightning strikes around here, and was wondering about
this:

Presently have a receive-only random length wire running around the inside
of my attic....

But, does the roof provide any protection ...

Or, is the fact that it is indoors really meaningless ?
Thanks, Bob


The roof has absolutely no significant magnetic properties, right? SO...
the high current of the lightning is the "primary" of a transformer. The
wire in your attic is the "secondary" of a transformer. A pretty poor
transformer, but with that current, it'll induce lots'a voltage in your
wire...roof or no roof. Right?

73, Steve, K,9.D;C'I

Antennas And Lightning Induced Voltage Transients
 

The roof protects the antenna from lightning, even the sneaky stuff.
All you have to worry about is lightning striking the roof and
yourself if you are not under it.
----
Reg.

Antennas And Lightning Induced Voltage Transients
 

Robert11 wrote:

Hello:

We get a lot of lightning strikes around here, and was wondering about this:

Presently have a receive-only random length wire running around the inside
of my attic.

Guess I'm not really too worried about "direct" lightning strikes; if there
is one I imagine I have a lot more to worry about than the radio.

But, does the roof provide any protection from nearby lightning strikes
inducing a high transient voltage
into the indoor attic antenna wire, as compared to if I had the wire antenna
strung outside the house ?
Again, from an induced voltage standpoint concern.

Or, is the fact that it is indoors really meaningless ?


Meaningless. A neon to ground is traditional for
receiving antennas. Makes a good EMP indicator.


vy 73

Andy