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Angier is on the right wavelength (no pun intended) -- I have installed the
UPS (Apollo) SL60 (GPS TSO enroute, Comm) in my Challenger II ultralight.  It
not only contains a 2 place intercom, but you can also choose to monitor the
standby frequency, such as ATIS.  

If  the active frequency receives a transmission, the monitored standby is
blanked out.  This is better than two comms, monitoring ATIS on the second
thru the audio panel, since usually it would be necessary to manually switch
off the second comm selection to hear the incoming transmission on the first.

Audio sampling techniques are used for the monitored frequency, so the audio
is not perfect, but it is usable.  BTW, the intercom is inactive during
monitoring.

The squelch and intercom VOX parameters are digitally set thru the "system"
function on the unit.  The intercom works great even when the Rotax is
turning 6300 RPM.  The radio is excellent and is connected to a bent whip
belly-mounted with a 14" square ground plane shared with the transponder
antenna.

For more info, goto    http://www.upsat.com/prodovr.html

If only these "slimlines" were around when I built the Lancair, I certainly
would have used them instead of  Terra.

I also use the Rocky Mountain Micro-Encoder for all the air-data.  The
micro-encoder feeds this information to the GPS so that winds aloft are just
one button push.  Sometimes I look out the window, too.

Scott Krueger
N92EX, etc.

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Please send your photos and drawings to marvkaye@olsusa.com.
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