That is a great RF shield and very similar to what is built for just that
purpose in many rf/hf facilities. We had similar RF shielded enclosures in
our embassies to avoid rf escaping to the outerword, and such enclosures in
base facilities where we did repair work on our equipment. If you could be
assured that the vault door remained shut during the time of an EMP it would
be a very good place to keep emergency equipment. Of course, putting any
equipment in a vault, and hooking it up to the outside world thru coax
and/or ac lines would invalidate any protection afforded by the steel
walls/floor/ceiling. There are filters that would take care of the AC
supply, and you could pass the incoming signals thru light pipes, but that
still doesnt allow transmission, without the coax.
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesy I upload to eQSL but if you
use that - also pls upload to LOTW
or hard card.
moderator [EMAIL PROTECTED]
moderator http://groups.yahoo.com/group/DXandTalk
----- Original Message -----
From: "DuBose Walt Civ AETC CONS/LGCA" <[EMAIL PROTECTED]>
To: <digitalradio@yahoogroups.com>
Sent: Tuesday, February 20, 2007 10:07 AM
Subject: RE: [digitalradio] Remotely controlled radio with full
connectivity.
> I tried out my IC-T7H in the NOSC of a large ISP which was in the basement
vault of an old bank.
>
> There was a really good repeater within4-6 blocks of the NOSC and I
couln't hear it or anything else on 2 or 79 cm.
>
> When I stepped out to the vault and the vault door was closed, everything
came back to normal.
>
> Walt/K5YFW
>
> -----Original Message-----
> From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
Behalf Of LELAND ZANTESON
> Sent: Monday, February 19, 2007 5:54 PM
> To: digitalradio@yahoogroups.com; digitalradio@yahoogroups.com
> Subject: RE: [digitalradio] Remotely controlled radio with full
connectivity.
>
>
> Beware a heavily populated commercial radio site. If they have pagers or
other
> digital hardware, the RF noise at HF can be terrible. I am a former owner
> of mountain top radio sites and have tried operating from my buildings and
> ended up moving at least 100 yds. from the building. Sites may not be all
> the same but on my sites you could not operate HF in the building.
>
> Lee
> W6FPO
>
> LELAND ZANTESON
> [EMAIL PROTECTED]
> Why Wait? Move to EarthLink.
>
>
>
>
>
> Announce your digital presence via our DX Cluster
telnet://cluster.dynalias.org
>
> Our other groups:
>
> http://groups.yahoo.com/group/dxlist/
> http://groups.yahoo.com/group/themixwgroup
> http://groups.yahoo.com/group/contesting
> http://groups.yahoo.com/group/wnyar
> http://groups.yahoo.com/group/Omnibus97
>
>
> Yahoo! Groups Links
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.441 / Virus Database: 268.18.3/693 - Release Date: 2/19/2007
5:01 PM
>
>
