Heh, try Hardee board (concrete) or aluminum siding, or stucco (wire
based to hold it together). Or clay brick roofing.
BUT that also contains wifi within the structure for network security hi
hi.
If the antenna choice is HOA based (yuck, ick, ew) perhaps laying the
invisible wire ON the roof will work (better) for you (install on a week
day while everyone is at work/school). The other issues include potent
RFI in the building (smoke detectors are great receivers, particularly
on 40M; GFCI devices are second best).
73,
Rick nk7i
On 7/29/2023 9:46 AM, Dr. William J. Schmidt wrote:
A bigger concern for attic antennas is the use of "radiation shield"
plywood on the roof of houses build in the last 10 years or so that turn
the attic into a Faraday cage. The single most annoying reason cell phones
don't work inside your houses anymore.
Dr. William J. Schmidt - K9HZ J68HZ
-----Original Message-----
From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net>
On Behalf Of Steve L
Sent: Saturday, July 29, 2023 10:42 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Grounding, Lightning & Attic Antennas
Jim & Co.,
I’m reading all the recent posts on the Elecraft reflector concerning
lightning protection…
After a recent move, I am working on the design and construction of
attic antennas for both HF and V/UHF. The topic of grounding and/or
providing lightning protection for this installation has baffled me given
no outside presence of any antenna components. While not so concerned
about a direct strike (perhaps naively?) I am concerned about induced
currents and resulting equipment damage - where clearly disconnection may
be the best protection.
Might anyone have any good references for reading/study on grounding
recommendations, how to’s, best practices, etc. for attic antennas?
Thanks a bunch,
73,
Steve
AA8AF
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