Re: [coldwarcomms] A EMP Question.
- Waveguide is especially well grounded, as is all other tower
appurtenances as well.
The low freq EMP component manifests itself in miles of wiring, like
primary and secondary power lines to produce the horrendous voltages
which puncture insulation and cause problems. The relative short length
of waveguide, towers, guy wires etc, are not as much the problem as the
ingress of the pulse via the power mains feeds. Thus nice big
polyphasers (or similar) were used to control ingress. Ive stood in a
doorway next to a set while I watched lightning hit the tower about 2000
yards away, and the crack was deafening as they discharged. (You can
tell by the time frame it was induced into the lines vs an actual hit,
as I watched the sonic shock wave cross the field, knocking drops of
water off the plant life.) Everything survived just fine.
Dex W4DEX wrote:
> lasertower wrote:
>> Ok, What goes into a waveguide at a site to to keep EMP out of the
> I'm certainly no authority on EMP but from what I understand damage by
> the pulse is primarily caused by induced energy into conductors. The
> amount of microwave radio frequency energy created by a blast that is
> received by the directional antennas aimed on the horizon I suspect is
> minimal. What broadband microwave energy there may be from the antenna
> is then reduced even more by the channel filters. The waveguides at
> hardened sites pass through a thick steel waveguide windows which are
> very well grounded to the building's full metal shield which would keep
> the induced current carried by the waveguide from passing into the building.
> Hopefully someone knowledgeable on the subject will enlighten us all.
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