Re: Going on an Antenna Hunt (was: RF interference issue again (esp. for E Drucker and Jim Weir and other RF wizards)

Channel two visual is 55.25 mHz and aural is 59.75 mHz. Their digital
channel is transmitted on channel 43 with a pilot frequency of 644.31
mHz. Digital audio and video are encoded into one data stream.
--
Gene Seibel
http://www.pad39a.com/gene/plane.html
http://www.pad39a.com/gene/broadcast.html



> 
> What is TV channel 2 digital sound frequency and normal
> Channel 2 sound frequency?  Just wondering if by chance
> the difference between the two might be...127.0??  How
> about Channel 2 and Channel 5?
> 
> Jim Weir <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> > Well, then take other folks advice who have had this problem and solved it.  I
> > gave you the method that works for me.
> 
> I take my hat off, then Jim.  I could barely scrape up the
> hour to drive around, much less weeks or days or even hours
> to park patiently.  We're going to have to get at this by
> pragmatic combinations.
> 
> > ->If I drive to the antenna farm and get the interference,
> > ->does it prove the problem is outside my plane, or just that
> > ->the handheld is also more susceptible to it?
>  
> > It proves that the problem is outside your aircraft.
> 
> But....does it?  The handheld is normally *in* my aircraft.
> Albeit, it is normally disassembled from the battery pack
> and with the ducky antenna disconnected from it.
>  
> And..what about the testimony of the DE that she flies in
> lotsa planes in that area all the time and never heard that
> problem before?
> 
> > why I suggested that you find a friend that lives close to the farm 
> 
> No such critter alas.  We live about as close to it as anyone we 
> know.
> 
> > ->How could my nav radios (or my handheld) be contributing
> > ->to this problem when they are *powered off*?
>  <good explanation snipped>
> >  If any of these
> > "spurious mixer products" falls within the passband of the nav input filter, 
> > it will be reradiated out the nav antenna directly into your com antenna.
>  <...>
> > Did that help?
> 
> Yes, thank you!  That was very clear.
> 
> But just to confirm: what I'm hearing is that frequencies can
> mix and be reradiated by a turned-off radio, *but they need an
> antenna* to get anywhere?  ie, if the ELT is in the plane but
> disconnected from the antenna, it's not likely the source of
> the problem...likewise, if the portable nav/com is disconnected
> from its antenna?
> 
> Have we likely absolved my plane at this point?
> 
> Sydney