I see the same output powers on my K3S. Key down voltage is 13.4 volts on the VFO B display at maximum power out. Elecraft offered to upgrade my PA chain for $100, but I'm not concerned about ~1dB and is within spec for 6m anyway. Glad that diode is in there. I tested its function once.
_________ 73, Jim - N4ST -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Don Wilhelm Sent: Tuesday, June 25, 2019 08:31 To: EVERETT SHARP <[email protected]>; [email protected] Subject: Re: [Elecraft] Low Power Output on 160 and 6 meters Everett, What is your power supply voltage during transmit at 100 watts as measured with the Alternate VFO B display? With a solid 13.8 volt power supply voltage, you should see no lower than 12.7 volts (there is a diode drop inside the K3). If lower, check the connections in the power cable for tightness. The K3 power cable should run direct from the power supply. Rigrunner and other DC power distribution boxes can be reason for excessive voltage drop. You can increase the power supply voltage up to above 14 volts to help - do not exceed 15 volts. 73, Don W3FPR On 6/24/2019 6:51 PM, EVERETT SHARP via Elecraft wrote: > I have three K3S and over the week-end I connected each of them to my Bird watt meter, with a Dummy load. Each of K3S were updated to the current Firmware and each had the 5 and 50 watt calibrations run. > > What I found was all 3 showed from 80 to 90 watts output on 160 meters > and on 6 meters I saw 75 to 90 watts. All other bands showed > typically > 105 to 110 watts. However, one of the K3S showed exactly 100 watts on all bands except for the lower power on 160 and 6 meters. > ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
