Hi, How are you measuring your actual output and in which mode are you testing it? I have a K3S and a K3 souped up to near K3S but still with the original transmitter chain. I have no problem achieving 100W with either one of them into a factory calibrated LP100A, testing it in FM mode. Overall I think the original KPA3 with bipolars is at least as good a transmitter as the new FET-based KPA3A. The transmitter chain in the K3S has been "recalled" twice in order to improve the 3rd order IMD. The original KPA3 has remained unmodified as far as I know.
Heve you done the wattmeter calibration based on a wattmeter you trust, such as the LP100A (by Telepost.inc) and have you done the TX gain calibration? A properly functioning K3 or K3S should have no problem achieving 100W provided the power supply is making 13.8V or more *at the transceiver*. AB2TC - Knut K9MA wrote > I've always felt that the KPA3 in my K3 was marginal. For example, I've > never been able to get more than about 80 W out of it on 15 meters. (And > that's at about 14.5 V) Is the KPA3A any better? > > 73, > Scott K9MA > > On 1/5/2019 15:23, Robert Friess wrote: >> Hank, > <snip> -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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
