Fisher Price 157 Baby Monitor AGC Defeat
 

Did it years ago and never documented it. Anyone ?????
Thanks
Pancake

Fisher Price 157 Baby Monitor AGC Defeat
 

On Mon, 10 Jul 2006 19:09:17 -0400, pancake
wrote:

Did it years ago and never documented it. Anyone ?????

Probably just lift the AGC diode. But why?

Fisher Price 157 Baby Monitor AGC Defeat
 

On Mon, 10 Jul 2006 21:40:25 -0400, Al Klein
wrote:

On Mon, 10 Jul 2006 19:09:17 -0400, pancake
wrote:

Did it years ago and never documented it. Anyone ?????

Probably just lift the AGC diode. But why?

I Prefer constant levels,

Thanks
Pancake

Fisher Price 157 Baby Monitor AGC Defeat
 

On Wed, 12 Jul 2006 06:04:33 -0400, pancake
wrote:

On Mon, 10 Jul 2006 21:40:25 -0400, Al Klein
wrote:

On Mon, 10 Jul 2006 19:09:17 -0400, pancake
wrote:

Did it years ago and never documented it. Anyone ?????

Probably just lift the AGC diode. But why?

I Prefer constant levels,

Which is what AGC gives you. Without it you get constant gain, but
varying levels.

Fisher Price 157 Baby Monitor AGC Defeat
 

On Wed, 12 Jul 2006 08:32:06 -0400, Al Klein
wrote:

On Wed, 12 Jul 2006 06:04:33 -0400, pancake
wrote:

On Mon, 10 Jul 2006 21:40:25 -0400, Al Klein
wrote:

On Mon, 10 Jul 2006 19:09:17 -0400, pancake
wrote:

Did it years ago and never documented it. Anyone ?????

Probably just lift the AGC diode. But why?

I Prefer constant levels,

Which is what AGC gives you. Without it you get constant gain, but
varying levels.

Perhaps I was incorrect in calling it AGC, the data sheet on the chip
calls it ALC . Regardless, it sucks up unwanted noise from the audio.

Fisher Price 157 Baby Monitor AGC Defeat
 

On Wed, 12 Jul 2006 21:59:19 -0400, pancake
wrote:

Perhaps I was incorrect in calling it AGC, the data sheet on the chip
calls it ALC . Regardless, it sucks up unwanted noise from the audio.

Sounds like a squelch control. It turns the audio off if there's just
background noise?

There's something being fed to that pin on the chip. Either ground
the pin or connect it to the positive rail - one or the other is
effectively "off" for the function. If you have a voltmeter, just
check which way the voltage goes to cut off the audio - you want the
other voltage on it constantly.