Re: [Elecraft] KX3 running warm even at very low power out
During transmit your PA current will increase even with no power out due to biasing of the final PA devices. On my KX2 current draw goes from 135 mA (RX) to 500 mA (TX) just by hitting the XMIT button but with no key down. Over the 2 minute TX cycle of WSPR that will heat up the heat sink a bit. But that's normal. HTH 72, Brian, K0DTJ On 12/6/2018 12:50, Mike Parkes wrote: I have been experimenting with WSPR mode at 2-10 milliwatts of power out as measured by the WM-2 wattmeter. I notice that the back of the KX3 heat sinks are still fairly warm to the touch at such low power. It surprises me that the finals would still get that warm at this level of power out. Is that normal? I don't want to damage the radio tryin mg to xmt very low power! :)... I have nothing to compare to except it feels at least as warm as it did at 1 or 2 watts out. (I am using the power level output from WSJT-X to set the power out to levels lower than what the KX3 can show which is limited to 100 mW.) Mike AB7RU __ 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
Re: [Elecraft] KX3 running warm even at very low power out
The only time I've ever gotten a HI TEMP warning was running WSPR at about 0.1 watt. Go figure. On Thu, Dec 6, 2018 at 3:50 PM Mike Parkes wrote: > I have been experimenting with WSPR mode at 2-10 milliwatts of power out as > measured by the WM-2 wattmeter. I notice that the back of the KX3 heat > sinks are still fairly warm to the touch at such low power. It surprises me > that the finals would still get that warm at this level of power out. Is > that normal? I don't want to damage the radio tryin mg to xmt very low > power! :)... I have nothing to compare to except it feels at least as warm > as it did at 1 or 2 watts out. (I am using the power level output from > WSJT-X to set the power out to levels lower than what the KX3 can show > which is limited to 100 mW.) > Mike AB7RU > __ > 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 r...@wc3t.us > -- 72, Rich Hurd / WC3T / DMR: 3142737 Northampton County RACES, EPA-ARRL Public Information Officer for Scouting Latitude: 40.761621 Longitude: -75.288988 (40°45.68' N 75°17.33' W) Grid: *FN20is* __ 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
[Elecraft] KX3 running warm even at very low power out
I have been experimenting with WSPR mode at 2-10 milliwatts of power out as measured by the WM-2 wattmeter. I notice that the back of the KX3 heat sinks are still fairly warm to the touch at such low power. It surprises me that the finals would still get that warm at this level of power out. Is that normal? I don't want to damage the radio tryin mg to xmt very low power! :)... I have nothing to compare to except it feels at least as warm as it did at 1 or 2 watts out. (I am using the power level output from WSJT-X to set the power out to levels lower than what the KX3 can show which is limited to 100 mW.) Mike AB7RU __ 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
