"Dave Holford" wrote in message
...


Cmdr Buzz Corey wrote:

SR wrote:
Is it possible to have a radio that when the signal comes in, it can
tell you which dirrection it's from?????????????????????????????????


Yes.

ADF works well in aircraft for LF and MF
VOR works for VHF
TACAN works for UHF
and some military aircraft carry UHF DF
Plus, of course, ECM systems work throughout the spectrum.

Dave
Who has used them all, but long ago!

I am reading his question for the point of view of DF'ing ANY radio signal
in an effort to gain knowledge of it's possible source.

VOR is a deliberately phase modulated signal, as is TACAN. Not much point
DF'ing them from a ground station since their location is known, or can be
found from the Ident. Now UHF DF certainly has some applications,
particularly if DX'ing FM broadcast stations, but so would a yagi and a
rotator.

Since the newsgroup is r.r.shortwave, then DF'ing shortwave seems to me to
be the topic. Here is another method worth trying, particularly because of
it's compact size. http://www.qsl.net/dj3tz/loop1.html

Brad.