Ian, > If this area of code is to be revisited, the gap in available power > settings on 50MHz also needs to be addressed. > > The maximum available power without the KPA3 is 8W on 50MHz, but the > minimum available power with the KPA3 activates is about 13W > - a jump of more than 60%.
The "gap" is not a matter of code, it is a matter of the power available from the LPA on six meters. The LPA can not make more than about 8 watts and stay "clean." However, the gain (ca. 12 dB) of the HPA is such that 13W is a minimum practical output. This leaves the gap. If the external 50 MHz amplifier needs only 10 W for full output (e.g., a grid driven tetrode) additional grid swamping on an attenuator would be a wise investment. 73, ... Joe, W4TV > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ian > White GM3SEK > Sent: Monday, December 07, 2009 1:39 PM > To: [email protected] > Subject: Re: [Elecraft] K3: incrementing Power level > > > DOUGLAS ZWIEBEL wrote: > >Well, if this can be a user selection fine. But I really like the > >"tiny steps" below 12 watts. Please retain that. > > If this area of code is to be revisited, the gap in available power > settings on 50MHz also needs to be addressed. > > The maximum available power without the KPA3 is 8W on 50MHz, but the > minimum available power with the KPA3 activates is about 13W > - a jump of > more than 60%. > > This isn't important when the K3 is operating barefoot... but > with some > power amplifiers, in some countries, the legal power limit > falls right > into the hole. > > > > -- > > 73 from Ian GM3SEK > ______________________________________________________________ > 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
