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Old 10-05-2012, 05:04 AM
vk6zgo vk6zgo is offline
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Join Date: Jul 2012
Posts: 607

Originally Posted by crutschow View Post
Over-modulation may cause higher harmonics to appear in the RF spectrum. That would be largely rejected by the bandpass filter in the receiver but would cause "splatter" noise in any adjacent channels. See this for a demo.
On a similar subject,Newbie "Hams" sometimes buy cheap CB-type "linear" RF amps on eBay.

More knowledgeable Amateur Operators advise them:-

"Dont use them,as they are horribly non linear!"

Their answer is usually:-

"But I used it already on 10m & got good reception reports!"

Other spectrum users are far less happy!

Of course,this isn't anything to do with overmodulation,but it demonstrates how difficult it is for a Receiver operator to discern quite severe distortion by ear.

Last edited by vk6zgo; 10-05-2012 at 05:12 AM. Reason: Additional comments
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