Mobile Max
Note: If you have pressed and held the Play/Rec button (13) for 2 seconds and the E.T.S.
display (3) is flashing the letter "A" but you decide you do not want to record over your last
recorded message, momentarily press the Play/Rec button again (do NOT key the
microphone) and the E.T.S. display (3) will return to the currently selected E.T.S. setting and
the MobileMax will not erase your previously recorded message.
The message is digitally recorded into digital memory. The MobileMax will keep the last
recorded message in digital memory for years with no power connected to the MobileMax.
Trouble Shooting
One of the most frustrating problems that often occur when adding power microphones or
external effects boxes (such as MobileMax) to existing radio installations is RF feedback
(Squealing). RF feedback is caused when some of the transmitted radio energy is able to
find it’s way back to the microphone input of the CB. Even if your radio didn’t have any
problems before, adding a power mic or effects box can start an RF feedback problem if your
radio and antenna system are not installed properly or in good condition. Make sure that you
have good, solid ground connections on your radio and antenna, that are free from corrosion.
Also make sure that your antenna coax is in good condition and not pinched or shorted.
Have the SWR (Standing Wave Ratio) of your system checked. Preferable, it should be 1.5:1
or better. Also there is less chance of RF feedback problems if the MobileMax chassis is not
connected to the metal chassis of your CB radio or vehicle. Mount the MobileMax to a non-
metal panel or use double-sided foam tape. If you connect an external speaker to the
MobileMax, it is possible to get audio feedback (squeal) if the Speaker Vol control (12), is
turned up too high.
http://www.bellscb.com/products/microphones/astatic/mobile_mic/mobilemax.htm (4 of 4)12/30/2003 7:50:29 PM