The Comtronics DUAL-COM intercom is the only
intercom made exclusively for ultralight and light- plane operation that
will selectively receive and transmit on two transceivers without
In addition to the same circuit as that used
in our popular ultralight intercom.
we have added a very efficient switching circuit that makes the unit even
provides a pilot the option to
transmit from either of two separate transceivers while monitoring both
For instance, the pilot may wish to contact
his ground crew via one transceiver
and also notify a nearby airport of his location and intentions on
another. All of this can be accomplished by using
the simple switching circuit provided.
The entire circuit has been placed within a
metal enclosure of overlapping construction to effectively shield out RF
and EMI interference. The selection process is controlled by one toggle
switch located on the front surface of the box. Radio actuation is
controlled by a single push-to-talk switch which may be mounted on the
aircraft in a convenient location; for instance, on the pilot's control
In addition to the dual transceiver
interface, the intercom includes a 9-volt battery for back-up and a 12-
volt power jack with a voltage regulator built in. On the back side, there
is a music input port that may be used for an FM radio or tape player.