3
3.0 Music-In Jack
With the PA-400ST stereo version intercom you will be able to listen to music in true stereo. The intercom
comes with a cord labeled Music-In. Plug the end of the cord labeled Music-In directly into the jack labeled
Music-In/Cell Phone. Plug the other end of the cord with the 3.5mm plug into your music source (IPOD,
MP3, CD Player etc.).
3.1 Cell Phone
Our latest modification to our proven intercom is the addition of a cell phone jack. This will allow the pilot to
use their cell phone though the intercom while still wearing a headset. Some cell phones may require an
adapter which can be purchased at most electronic stores. This feature also provides the Pilot with a back-
up for the aircraft radio should the radio have a malfunction. Your intercom comes with three cords labeled
Cell Phone, Music-In and Record-Out. The end of the cord labeled Cell Phone plugs directly into the jack on
the intercom labeled Music-In/Cell Phone. To use a cell phone with the intercom, you will need to set the 3-
way control setting to CREW or ALL mode. The Pilot Isolate mode will not work with a cell phone as its
function is still maintained to isolate the Pilot from anything other than ATC. In CREW mode, with the cell
phone plugged in, the Co-Pilot will hear the Pilot-in-command talking on the phone. If the Pilot does not
want the Co-Pilot to hear the conversation, the squelch needs to be turned all the way counterclockwise.
The same rule applies in the ALL mode. If the Pilot is in ALL mode and wants privacy, the squelch should be
turned all the way counterclockwise. The Pilot can then talk in a low voice and the passengers will not hear
them because their headsets will block out any noise or conversation. Of course when the squelch is fully
turned counterclockwise while the phone is engaged, nobody except the Pilot will have a functioning
microphone. Air Traffic Control will always be more intelligible (louder) than music or incoming cell phone
conversation allowing the pilot to always hear ATC transmissions.
3.2 Battery Power
We recommend using two 9V alkaline batteries to operate your intercom. The intercom can operate on one
9V battery, but the installation of two will provide you with 40-50 hours of maintenance free use. We
recommend that you keep a log of when your batteries were installed so that you have a good idea when
they should be changed.
3.3 Auxiliary power Cord (Cigarette lighter Adapter)
The adapter is recommended to be used only as a back-up power source. All aircraft manufacturers
recommend not using the cigarette lighter adapter as a power source for portable accessories. The adapter
supplied with the unit has been UL approved and has a built-in fuse in the body of the adapter to prevent
damage to the intercom or the aircraft. Replace the fuse only with the same type 2A-125V or 250V fuse.
3.4 Back-Lighting with On/Off Button
Your intercom is equipped with a chrome button that enables you to illuminate the intercom’s control panel
for night flying or if the intercom is placed in a position where it is dark in the cockpit. The back-lighting does
use more power from the 9V battery so if you are using the intercom and the backlighting is not required, we
suggest turning the control panel lighting off.
3.5 Pilot’s Volume Control
The Pilot’s volume control also serves as the Off/On Switch. You increase the volume by turning the control
clockwise. Decrease the volume by turning the control counter-clockwise.
3.6 Co-Pilot / Passenger Volume Control
This control regulates the volume heard by the Co-Pilot and passengers. It operates independently of the
Pilot’s volume control.
