As one who has been exploring caves for the last 40+ years, my
principle interest in the 630M band is its ability to
communicate thru solid rock. There is a long history of cave
radios operating on medium frequencies under part 15, most of
which use antennas consisting of a coil of wire. (One o
35-dB over noise for months with barely a couple dB variation
in strength. Terrific emcomm potential. Why the ships used it for
their emergency band when CW was still in use.
73, Ed
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Date: Sun, 08 Jul 2012 15:48:18 -0700
From: Jim Lowman
Subject: Re: [Elecraft] K
There are plenty of LF converters to homebrew from, most very
simple including those using an SA602/612. Another is the AMRAD
LF converter, QST April 2002. PCBs can be purchased from FAR
circuits. I use three of those for dual RX and TX with a 14MHz
local oscillator and a K3 in transverter m
Not to rain on anyone's parade, Bill, but a couple of things
come to mind:
-- I would think it a risky business to develop a transceiver
for a band that is not yet authorized for amateur use
-- If most of us have trouble getting an antenna going for
160m - wow - 630m?
Just thinki
Wayne:
An Elecraft Transverter for below 510 kHz would be well received, world wide.
I guess the number of participants would be rather low to start with but
interest would increase with the availability of such an item. A poll of the
amateur market would give a good indication of interest.
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