I understand the modern RICEBOXES had speech processing the clips peaks and filters the audio.
I had a tube speech processor back in the 60's. It was a classic clipper/filter. It worked very well. For a lower power transmitter like the smaller Heath DX units you can increase the voice level clipping and filtering there by generating a higher modulation index without over modulating. And if properly set you won't exceed the legal limits. I am going to build another one for my current DX-60. Bob Macklin K5MYJ Seattle, Wa, "Real Radios Glow in the Dark" ----- Original Message ----- From: "D. Chester" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, February 15, 2008 1:46 AM Subject: [AMRadio] RE: MODULATION POWER REQUIRED > Most of us stay somewhere within the ballpark of the so-called "legal > limit", and worrying about an occasional voice peak that might jump a little > over, every now and again for a milliseconds or two during the course of an > entire old-buzzard transmission, is MUCH ADO ABOUT NOTHING. Is everyone > that picky and consientious in regard to exceeding the posted speed limit > when we drive, something that can actually put our own or someone else's > life in danger? > > We need to be more concerned about overmodulation, flat-topping and other > improper conditions that generate spurious distortion products and do actual > harm on the bands by causing unnecessary splatter and interference beyond > the limits of our normal channel width. (Not the same thing as the higher > frequency audio components that occur naturally in our voice signals.) > > Don k4kyv > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
