>>> Part 1 of 2...
 
-=> On 01-13-98  19:51, Rob Dennis said to Ivy Iverson,<=-
-=>"About Jammer hunting.......,"<=-
 
Hi, Rob;
...
 
 RD> If you have seen the news then you know what has been going on up
 RD> here with  the freezing rain storms.
 
Yep, I've been following it on The Weather Channel.  There are over
a million people in Maine that STILL don't have electricity, and it's
been over a week.  Several have died, either from hypothermia or CO2
from gas stoves and/or emergency generators.
 
 RD> During this emergency we have had some idiot playing games with a
 RD> repeater by blowing packet transmissions and DTMF tones into the
 RD> repeater during emergency nets we have going 24 hours a day.
 RD> I hope this idiot gets frost-bite from lack of hydro and heat and
 RD> looses all  their fingers.
 
It would serve him/her/it right if they had to do without power and
needed help but couldn't get it.  I hope you find the twit and give
'em a well-deserved "vacation" from being on the air. >SMASH!<   ;-o
 
 RD> This was NOT the time nor the place to be an idiot and this jack-ass
 RD> had to  prove just how much of an idiot they were by attempting to jam
 RD> the nets. 
 
The RIGHT time to pull crap like that is _NEVER_, but some people just
can't understand that.  What kind of a sadist does it take...?
 
 RD>> Now with APRS DF-ing is easier to do with one stationary point
 RD>> and several  mobiles using the APRS software to nail the twit.
 
I am getting ready to build a Handi-Finder with a mod that makes it
switchable between "Figure-8" and "Cartioid" patterns.  (Found plans for
both in some old QST's that were given to me).  The hardest part is
finding the IC chip called for, though I suppose I could build the
equivelent circuit, (a free-running multivibrator).
 
 II> That should be a more efficent way of tracking them.  There are a few
 II> Hams in this area that are playing with GPS and APRS, but I think the
 RD> It would if there were enough people willing ot take the time to
 RD> learn how to  use the APRS software to do DF-ing.
 RD> Sometime in the spring we must get a group together and play with it
 RD> more. 
 
How about foxhunts?  Those are a fine way to sharpen the DFing skills.
 
 RD>> I'm still playing with the APRS software,but only for the DF part of
 RD>> it for now as I do not have a GPS unit yet.
...
 
 RD> GPS units here with RS-232 ports are in the $299 Canadian range and
 RD> up. Cost depends on what features you want or need the unit to
 RD> have,and how much  money you have to spend on a unit.
 
I suppose so... the more chrome anything has, the more expensive it gets.
 
 II>> Strange thing happened about a week ago, though.  I happened to be
 II>> listening around to out of town repeaters, and I heard someone local
 II>> trying to jam a conversation on the OUTPUT of a machine perhaps 40
 RD>> Sounds like you have a stolen or "found" radio in the hands of a
 RD>> someone who has no idea of how a repeater really works.
 II> This is quite possible in this case, but that is not how our local 
ammer
 II> works.  (It could be a copy-cat).  The main jammer hereabouts has a dual
 II> band, probably a mobile, with crossband repeat, and has used it to lock
 II> up both the 444.175 and the 147.06 machnes by crossband repeating when
 RD> Ok...
 RD> If they like to cross band the two repeaters check the inputs of the
 RD> repeaters for the output audio of the other repeater being
 RD> cross-banded. Go after THAT signal on the input and nail them.
 
Obviously.   :-}
 
 RD> If they are doing full crossband repeat then they can be foiled by
 RD> changing  the length of the courtesy tone and tail drop time on the
 RD> repeater. A longer tone and tail-drop interval can mess their
 RD> crossband up as the radio  has to have no signal input before it can
 RD> switch to the other band to crossband it. ... If all they do is
 RD> crossbanding the -output- of a repeater into the -input- of  another
 RD> then it is easier to go after them as they are the only source of the
 RD> signal on the input. 
 
True.  But I believe they would stay locked up one of the machines times
out, and if it was the one with the longer tail, it would break down and
the other machine would reset, but if it were the one with the shorter
tail, and if it reset before the other machine "tailed out," it would
key right back up again, so they would go into a long-period oscillation.
 
 RD> SOMETHING TO BE AWARE OF!!!
 RD> A trick done here a few months ago was someone was re-transmitting a
 RD> simplex conversation from 2m to 70cm for -OTHERS- to recieve on 440 and
 RD> re-transmit to the input of several 2m repeaters at the same time.
 RD> Lasted for about 20 minutes and drew flack from those repeaters that
 RD> had the  one-way audio blasting their conversations and one net.
 RD> This presented several sources for the incoming signals over several
 RD> different repeater input frequencies.
 
Boy!  I guess idiocy seeks it's own level, huh?   :-<
 
 RD> Tricky to go after,but it couldbe done by isolating one of the
 RD> signals and  going after them only. When caught they will surely
 RD> chicken out and turn in  their buddies involved to avoid taking the
 RD> full blame. 
 
Ya, finding the one on 440 would be the way to do it in that case,
(assuming that it wasn't being relayed again on another 440 frequency).
 
 RD>> He/she/it has probably figured that since they can only hear one of
 II> Actually, both sides were coming in equally strong, (being a repeater
 II> output.)  IMO, the average CBer doesn't have the brains to pound sand
 II> down a rat hole when it comes to the technology which Hams take for
 II> granted.
 RD> Agreed Ivy, but that is the -average- cber.
 RD> Some of the jammers I ahve seen are VERY smart and know exactly what
 
 >>> Continued to next message...
 
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