Because if you are using something you can measure, like two tone, the gains are already set and steady. To measure leading edge distortions before an AGC loop or loops bite and settle takes some pretty expensive lab equipment, both before and after the transmitter/amp. What you got?
It IS terrible advice. 73, Guy. On Sat, May 15, 2010 at 4:25 PM, David M. Elliott <[email protected]> wrote: > If increased distortion is guaranteed, why doesn't it show on the spectrum > scope? > > We are obviously missing something here. > > 73 de W6BK > > > On May 15, 2010, at 11:03 AM, Vic K2VCO wrote: > >> Sorry, with all due respect this is HORRIBLE advice. >> >> I won't argue with those that say that the ALC should be connected for its >> protective >> value. But it should not be depended on to control output level -- the >> exciter should be >> adjusted to produce approximately the drive required for full output. >> >> The SPE Expert may have an exclusive design, but it is not exclusive enough >> to include a >> time machine so that it can know how loud the operator is planning to talk, >> and it doesn't >> control the delay inherent in the exciter's ALC circuitry. >> >> The result is guaranteed to be increased distortion. >> >> On 5/15/2010 4:25 AM, Björn Mohr wrote: >>> 2010/4/22, LA8AW<[email protected]>: >>> >>> >>> Here is the statement from the developer of the SPE Expert 1K-FA - regarding >>>> ALC, quoted from an early Expert Reflector:.... >>>> >>>> I hope this will clarify the SPE Expert vs K3 - and ALC !! >>>> >>>> We really suggest to always leave the transceiver's output power manual >>>> control to >>>> its maximum level because the EXPERT, thanks to its exclusive design, will >>>> provide to >>>> control that level as long as the required optimal value will be reached. >> >> >> -- >> Vic, K2VCO >> Fresno CA >> http://www.qsl.net/k2vco/ >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
