From: Thomas Adams <[EMAIL PROTECTED]> Subject: Re: [AMRadio] Re:Reactor Wanted
In the (unlikely) event of an FCC inspection, I doubt that the inspecting engineer is going to go with that sort of reasoning and observe such niceties, even tho it IS correct. The "right" answer in this case is the one that they tested me on for my (now defunct) 1st Class Radiotelephone license; the peak power of a carrier at 100 percent modulation is four times the carrier power. Anything else leaves too much wiggle room, and opens the door for lawsuits... especially if your rig doesn't use any sort of processing tricks like negative peak clippers. This is a matter of absolutes... and absolutes ONLY exist in bureaucracy and statutes. In those realms, reality means little or nothing. And the bureaucracy says that without processing, PEP equals four times the power of the unmodulated carrier.
With typical asymmetrical modulation with the male human voice, and the phase inverted to the "wrong" direction, 100% modulation of one kilowatt DC input would probably do well to achieve 1500 watts p.e.p. There is nothing in Part 97 that even mentions 4 times carrier power. What would the inspector use for SSB, since it has no carrier? Besides, I'd bet they couldn't even measure the carrier power output from a lot of AM transmitters presently on the air.
Most likely, they wouldn't have any way to measure anything that is not fed by 50-ohm coax. What if you use link coupling directly to a tuner that feeds open wire line, with only a pair of wires to tie the two links together? Or if you feed the open wire line directly from a pick-up coil coupled directly to the tank? Or what about an antenna that is connected directly to the tank circuit without any feedline or tuner?
My thoughts exactly, regarding p.e.p., can be found by clicking on this link:
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