My PEAK power is down by about 50% as measured on an 200MHz oscilloscope when the COMP is set to 0. This can't be right..
73 Stewart G3RXQ On Mon, 28 Apr 2008 22:25:36 -0700 (PDT), Paul G4LNA wrote: > > I quite agree with you Brian, I didn't think there was any other way of > monitoring SSB reliably. I've always used a scope way back when I used to > build AM transmitters and I have one permanently connected so I can keep an > eye on what's going on, meters tell lies I find. > > 73 Paul G4LNA. > > > Brian Lloyd-6 wrote: > >> There is no substitute for an oscilloscope. There are precious few >> meters that will read true peak power. Also, no meter is going to show >> you peak compression or outright flat-topping (clipping) like a 'scope. >> >> Someone mentioned that their power output went down when they turned >> the compression down and would Elecraft make power output remain >> constant as compression is reduced. Well, the power output (average) >> is *SUPPOSED* to decrease when you reduce compression. When speech >> compression is reduced, your peak-to-average power ratio increases. >> The peaks remain just as high but the average power is considerably >> less. This is another reason to want a 'scope to check your rig. >> >> BTW, how many people have done a two-tone test or a double trapezoid >> test for linearity? How many people even know what I am talking >> about? :-) >> >> (My first HF transmitter was a Central Electronics Multi-Phase exciter >> with a whopping 10W of output. When I got done making that work again >> you can bet I understood single-sideband. :-) >> >> Brian Lloyd >> Granite Bay Montessori School 9330 Sierra College Bl >> brian AT gbmontessori DOT com Roseville, CA 95661 >> +1.916.367.2131 (voice) +1.791.912.8170 (fax) >> >> PGP key ID: 12095C52A32A1B6C >> PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C >> >> >> _______________________________________________ >> Elecraft mailing list >> Post to: Elecraft@mailman.qth.net >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
