[FoxHunt] LPER Modes

Fri, 22 Mar 2002 20:11:13 -0800

"you will ALWAYS be pointing at the transmitter when the meter reads
zero"

Except when there are reflections :).

Bob wrote:
> 
> Well you are quite wrong......
> 
> The LPER does not have a for/aft ambiguity. If the
> transmitter is directly in front of you or directly behind
> you (or off the air) the meter will read zero. This is a
> null case and doesn't mean anything. With the usual
> sensitivity of the LPER you will almost never have the LPER
> pointing with 3-4 degrees of the transmitter (or away from
> it) so the meter will be reading something other than zero.
> You then rotate the LPER in the direction of the needle
> offset to cause the meter to go to zero, and you will ALWAYS
> be pointing at the transmitter when the meter reads zero. So
> simple even my wife can do it..
> 
> Bob, WB6JPI
> 
> "J. Craswell" wrote:
> >
> > -I have LPER Serial number 6 that I bought before they came
> > -out. I have been using since on a monthly basis (25+
> > -years??). I always use it in the DF mode and seldom have any
> > -problems with going the wrong way. The big problem is using
> > -it for horiz pol. I don't use it on signals that are weak
> > -enough not to require the attenuator cranked in a bit. In
> > -other words, I mostly use it within 500 ft of the
> > -transmitter as I drive the offroad thing that close. (
> > -remember that hidden transmitters are hidden by people and
> > -therefore much closer to places you can drive than ELTs
> > -usually find themselves.)
> >
> > Clearly you know what your doing and I would not argue with success.
> >
> > My point in teaching Recv mode only is that people who are just learning
> > tend to have a limited amount of info they can process.  The meter does this
> > in this mode and than this in the other is great if you have lots of been
> > there and done that.  Not so good when you break the equipment out of the
> > box infrequently <grin>  Plus while "you" may not go speeding off in a wrong
> > direction I think you will agree that DF mode only gives you a bearing which
> > can be reciprocal or not.  There is no true indication.  Recv mode I like
> > which "should" always point to the target.  And last our Aircrews as fine as
> > they are don't always get up there quick enough (for me anyhow) and I like
> > to get our ground pounders up on the hilltops radioing in azimuths asap.
> > Recv mode gives a fair direction quite a ways away.  DF is twitchy on weak
> > signals.
> >
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