Hi Jerry;
I believe there is a switch on the top of the radio to turn the monitor on 
or off.  I would not expect you to hear any audio through the speaker unless 
you turn the monitor on.  You might plug in some head phones, turn up the 
volume and see what your audio sounds like.  There is a very small notch in 
the audio knob.  Once you figure out where the audio should be set for best 
results without overdriving, just notice where that notch is located and it 
will help you find that spot again if the audio gain is readjusted.
73
Richard
----- Original Message ----- 
From: "Gery Gaubert" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, August 01, 2007 3:08 PM
Subject: mic gain on ic751a


Since I can't see the needle for the mic gin, I turned it gradually.
After a certain poing, I can hear my audio through the external speaker
that I have connected to my radio.  Is this normal?