At 04:10 PM 12/30/07, you wrote:
As I mobile around while monitoring the output of my 224.18 MHz
repeater as I have done for many years (it has been on the air since
the late 70's), I have never heard any kind of strange signals on
its output freq. or any 220 output freq. I have a 3 band Kenwood in
the car and am used to hearing signals break the squelch on certain
2M and 440 frequencies, but never 220. The past few weeks, I have
heard signals (CW, no modulation noticed) of a fairly strong nature
break the squelch on 224.18 MHz, much like the signals that break
the squelch on certain 440 repeater output freqs, which were
eventually traced to cable TV leakage.
I am wondering if anyone else has heard signals of this nature on
the 220 band? I know of three places within a few miles of my house
that emit these signals. I am going to take my talkie out one of
these days ands see if I can "home" in on one of these new signals.
Roger W5RD
If you are going to attempt to DF one of these signals, I suggest
that you take a handheld (or two) and set it to the fundamental
and a harmonic.
Example: Here in Los Angeles the T-Hunting frequency is
146.565, and one of the games the hiders play is to camouflage
the transmitter so on-foot hunting is an exercise in frustration.
However by stetting an handheld to the third harmonic
(439.695 MHz) I can walk up to within a few feet of the
transmitter. With the radio inside a sealed box, with an
attenuator I can get to within inches.
Ever try and find a green-colored soda straw (with a 2m
whip inside) in a wetlands preserve? At night, with no
moon?
So my suggestion is to use a 220 handheld to get close,
and when it saturates to go to 440 or even higher (using
a handheld scanner on 660, 880 or even 1300).
I wouldn't be surprised to find it's a piece of computer
equipment (like a router, print server, laser printer, etc).
I say this because my desktop trashes a few 2m
frequencies, and my Verizon-provided Actiontec GT704
router totally trashes GMRS frequencies. Interestingly
my HP Laserjet 4 is clean.
Mike WA6ILQ
