Could the "resistive material" be powdered toroidal material?
Might one then twist it around a cable, or wrap it like a coil
at a specific point, and at certain frequencies might it absorb
RF?
Might the "22 gauge stranded (19/34), tinned conductor" be grounded
at one end and serve as a drain?
Could the combo, wrapped around a coax line, be effective in blocking
and draining ground-induced energy from lightning, snow-static, sand-
static, and other low-level EMP?
Would a twisted pair of these be useful to carry a control voltage
to or from a tower - impervious to ingress from near-field high-power
RF?
Just speculating ... the physics is way beyond me.
Believe it or not... its actually a mil spec item. I did some searching and
it is mil-c-85485/5 which you can see at:
http://assistdocs.com/search/document_details.cfm?ident_number=34825&StartRo
w=54901&PaginatorPageNumber=1099&status_all=ON&search_method=BASIC
It has a 3 layer insulation with some kind of absorber in the middle layer,
they don't say in the spec but I would assume its probably some kind of
resistive material. They also say something about it only being effective
when used as a component in a shielded cable, so its probably not what you
want to run out and buy a bunch of to play around with.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net
-----Original Message-----
From: Dave Cole [mailto:dave@nk7z.net]
Sent: Sunday, September 09, 2012 12:51
To: K1TTT
Cc: rfi@contesting.com
Subject: Re: [RFI] just what everyone needs!
Oh Dear God!
--
Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|