Outstanding Helmet/Intercom System .Superior Noise-Attenuation .Quality
used for instruction or pleasure, the ULTRA PRO Standard Model INSTRUCT
-A-COM system with Dual Com II will provide quiet protection from engine and wind noise.
package comes fully assembled and consists of two ULTRA-PRO Standard
audio-equipped helmets, 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 to connect
to a tape player or FM receiver.
original ULTRA-PRO Standard helmet is a comfortable, superior noise
attenuating helmet. The other component of this package is the DUAL-COM
II intercom which features our proprietary two-channel circuitry. This unit
provides distortion- free voice transmission and can be used as an
intercom only. When used with the appropriate interface cables, it may be
connected to two transceivers for air-to-air or air-to-ground
also include superior frequency response, excellent sound quality and
impedance matching circuitry to interface with most hand-held
Comtronics DUAL-COM II 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
unit even more 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.