Outstanding Helmet/Intercom System Superior Noise-Attenuation Quality
used for instruction or pleasure, the DUAL-COM PRO-COM INSTRUCT -A-COM
system will provide quiet protection from engine and wind noise.
package comes fully assembled and consists of two PRO-COM Helmets and two
audio-equipped headsets, one DUAL-COM Intercom with a push-to-talk switch
and power cord which can be connected to a 12-volt power source. An
optional music cord is available t6 connect to a tape player or FM
PRO-COM helmets are very comfortable and protective. The headsets offer
superior noise attenuation and have large comfortable ear muffs. The other
major component of this package is the DUAL-COM intercom which features
our proprietary two-channel circuitry. The DUAL-COM intercom with
interface cables and transceivers may be used for air-to-air and
air-to-ground communication. Distortion-free voice transmission for
instructor and student is also available when used as an intercom only.
also include superior frequency response, excellent sound quality and
impedance matching circuitry to interface with most hand-held
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 modifications.
addition to the same circuit as that used in our popular ultralight
intercom, we have added a very efficient switching circuit that makes the
versatile. It provides a pilot the option to transmit from either of two
separate transceivers while monitoring both simultaneously.
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
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, such
as the pilots control stick.
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 por1 that may be used
for an FM radio or tape player.