Owner manual

The Sigtronics’ Audio Switcher enables the pilot
and passengers to listen to any programmed
entertainment, such as AM/FM radio, stereo or
monaural recorded music without missing trans-
missions from ATC, flightwatch, or traffic!
SWITCHING: The pilot is automatically switched from the audio bus
of his entertainment system to the VHF radio when a radio message is
received or transmitted and is switched back when the radio traffic is
completed.
OPERATING MODES: Several modes of operation are possible.
The pilot may listen to entertainment and be switched to the VHF, or
he may elect to remain on the VHF. He also has the option of putting
the passengers on uninterrupted music or letting the VHF interrupt
their music so they may hear the radio communications. (See Mode
Selection Table)
RADIO MONITORING: The “fail-safe” design assures that the pilot
will always receive the VHF, regardless of the position of the Switcher
controls.
HEADPHONES: High or low impedance headphones may be used
with the Switcher, however, all headphones being used
simultaneously should be of the same impedance and efficiency. This
assures that the audio volume will be the same for all persons.
CONFIGURATIONS: The Audio Switcher is available in four
configurations:
1. 12V stereo 2. 24V stereo
3. 12V monaural 4. 24V monaural
COMPATIBILITY: The Audio Switcher interfaces with virtually
any entertainment speaker output circuit.
Stereo Switchers - Compatible with stereo entertainment
systems and stereo headphones.
Monaural Switchers - Compatible with monaural entertainment
systems and monaural headphones.
Aircraft headphones or headsets may be used as monaural
units.
WARRANTY: The Audio Switcher is built of high quality
commercial components and carries a one year parts and labor
warranty.
SIGTRONICS CORPORATION
178 East Arrow Highway
San Dimas, CA 91773
PHONE [phone]
SPECIFICATIONS
WEIGHT: 11 ounces with cables and accessories.
SIZE: 4” x 2.9” x 2”
POWER: Utilizes aircraft power. 12V or 24V available.
POWER SWITCH: Turns Switcher “ON” and “OFF”.
PILOT/ALL SWITCH: Selects who is to be switched, when
wired as shown in Figure 1. (See Mode Selection Table)
HEADPHONE JACKS: Accept standard .250” stereo head-
phone plugs in stereo units and .250” phone plugs in monaural
units.
MUSIC INPUT: The Switcher provides loading so that your
entertainment system output will not be open circuited. This
eliminates the possibility of harming any music system.