[Elecraft] OT: Re: KPA500 mobile?

[Clay Autery]

I would think it would depend almost entirely on the orientation of the
tunnel...   (and satellite reception azimuth).

First, the longest of those two tunnels is only 425 feet or so.  The
other is significantly shorter (southbound).
The tunnels are oriented generally north/south which is the preferred
direction IF you have to monitor geosynchronous satellite transmissions
from overhead...  sort of).
You are right on the edge of a large body of water, which while not
brine, has better conductivity than the soil around the lake.
Significant potential for reflections off the high ground on almost all
sides....

Don't know where that first tunnel is, so I can't comment.  But if you
gotta hear in a tunnel.... those two would be great candidates...

73,

______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 4/14/2017 10:47 PM, Fred Jensen wrote:
> Semi-related curiosity regarding shielding.  My wife's car has
> Sirius/XM radio.  It usually loses contact with the satellite driving
> under Interstate bridges and the like.  Likewise in the garage.  OTOH,
> at our previous home there was a tunnel through a small hill, perhaps
> 1/4 mi long.  The XM worked fine through it. There are a pair of
> tunnels at Cave Rock next to Lake Tahoe through a granite mountain. 
> XM works fine through them too.  Anyone know why?
>
> 73,
>
> Fred ("Skip") K6DGW
> Sparks NV USA
> Washoe County DM09dn