Nov/Dec 2017 QEX has a very nice article by W4ENE on how typical male voice waveform asymmetries will cause peak-riding ALC to unnecessarily limit average power even through compression and other technologies.
I myself had noticed that my voice on an oscilloscope or as seen in Audacity, has these extreme asymmetries, even larger than the examples given by W4ENE. W3AM has a very nice web page on the subject too: http://www.w3am.com/ 8poleapf.html There he illustrates a simple op-amp all pass network that has substantial phase shift across the male speech bandwidth to “break up” the asymmetry. With links to the Kahn Symmetra-Peak, a broadcast radio unit that dates back the 1960’s. I’m gonna be building some hardware for myself soon! Originally posted by Tim N3QE to PVRC list. jim ab3cv ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
