PSN-L Email List Message
Subject: Question About Analog Seismo Telemetered On 163.797 in So.Cal
From: Douglas Gavilanes gavilan1@.............
Date: Wed, 06 Apr 2005 15:35:00 -0700
Greetings from under my rock. I have received a few questions recently
from fellow amateur radio folks about the *general* location of the
seismo that is currently telemetered via VHF (163.797MHz) into the LA
basin (for the Caltech Seismo Lab). I'm not seeking an exact location.
Most believe it to be located at Crystal Lake, L.A. Co., but I believe
having heard that it was on Catalina Island. The Crystal Lake seismo
(which most of us affiliated with PSN Pasadena listened to) was just off
of 162.810, but it went fiber or satellite ages ago. Many of us built
discriminators back then for its 680Hz tone, with data outputs, alarms,
etc. In any case, a few ham folks would like to know which way to point
a dedicated beam antenna for best signal reception. Since it is so
weak, one can't be sure if their antenna is aimed at the transmitter, or
at a reflection off of a mountain or building. Any direction here (pun
intended) is appreciated. Off list is OK, if you're concerned.
Garden Grove, CA.
Public Seismic Network Mailing List (PSN-L)
[ Top ]
[ Back ]
[ Home Page ]