Hi David,
I am late on that one but I would like to add some comments. I am using a
separate
intercom (Flightcom 403) as my radio does not have a built in one . Now I
am thinking at the possible architecture of my future 8.33 installation. It is
very tempting to withdraw the intercom, therefore saving panel space and making
the wiring simpler, but I see one big drawback: controlling the intercom
function
would be a lot more complicated. I have reviewed the Pilot Guide and
the Install Manual of the Garmin GTR 225 and GNC 255 radios. There is no
dedicated
controls for the intercom function on those units.
With a separate intercom, when you need to adjust the volume or the squelch of
the intercom, you just rotate a dedicated knob, which is intuitive and very
quick.
With the GTR225/GNC255 you have to scroll through several pages of menu ,
using several multifunction buttons and knobs with a risk of making a mistake.
In fact this is a configuration task, better not do be done in flight.
BTW switching from the 25 to the 8.33 kHz modes with those new Garmin radios is
also a configuration task, so I am afraid it will not be easy to handle the
transition
period, which may last for several years, where both modes will be used
by ATC. May be keeping our old radio for use in the 25kHz mode and use the
new one for the 8.33 mode only?
Remi Guerner
F-PGKL
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