View single post by Old-Frank
 Posted: Aug 10th, 2007 12:56 PM
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Old-Frank

 

Joined: Feb 23rd, 2007
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 There is a mistake on the schematic. Move the ground point on pin 24 of the LA1816 so Pin 24 is at ground, see the data sheet for the proper connections. In the attached schematic, I show where to bypass the audio AGC if it's used. I think when there no radio signal, the gain goes up, resulting in excess noise, which ends up covering any voices that come through. I put in the audio AGC cuz a few years ago these real strong voices would come through from stronger local stations, and clip, causing distortion. Recently I've been getting ghost voices, but the noise has to be removed before I can even hear them.

 

 Old Frankengrouchierman

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