> I wonder if any have chosen the Advance Aircraft Electronics
> units...These units are more expensive than the Archer units. Worth
it?
> Brian Skelly
Appears no doubt their VHF antenna is a straight leg dipole, whose
length has to be a compromise between COM and NAV frequencies. The
straightness of the legs is also not what you want for best radiating
pattern, and the fact that metal whip antennas are angled is not just
for aesthetics. Whether AC Spruce misleadingly calls them "high gain"
or the mfr does, doesn't matter either, as one cannot alter the
physics which results in a fixed gain of 2.15 decibels (dBi). So much
so that a straight dipole is also a reference for specifying gain of
actual hi-gain designs (dBd, the third character meaning "dipole").
So how she performs actual is a matter of a swapping comparison
against anything else, like a cobbled foil tape antenna, in one's
given installation position -- not performance in other people's
airplanes.
Reg,
Fred F.
|