[Elecraft] SSB Power Creep
I notice on MARS frequencies (slightly outside ham bands) that my power output starts out low and builds to full output over 10-20 seconds of transmit. The symptom is easily observed during an MT63 transmission and receiving stations comment that my signal starts out light and builds to a strong signal as the transmission progresses. I have run the calibration routine several times into a dummy load and all seems to go well but the problem persists. I see the same symptom in some ham bands but to a lesser extent, perhaps starting at half power and coming up to full power in a 10 seconds. Has anyone else experienced this or have ideas about a fix? God Bless 73! Jack - WE5ST __ 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] SSB Power Creep
Which Elecraft rig? —wunder, K6WRU On Jul 31, 2014, at 5:57 PM, Jack Berry via Elecraft elecraft@mailman.qth.net wrote: I notice on MARS frequencies (slightly outside ham bands) that my power output starts out low and builds to full output over 10-20 seconds of transmit. The symptom is easily observed during an MT63 transmission and receiving stations comment that my signal starts out light and builds to a strong signal as the transmission progresses. I have run the calibration routine several times into a dummy load and all seems to go well but the problem persists. I see the same symptom in some ham bands but to a lesser extent, perhaps starting at half power and coming up to full power in a 10 seconds. Has anyone else experienced this or have ideas about a fix? God Bless 73! Jack - WE5ST __ 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 wun...@wunderwood.org __ 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] SSB Power Creep
Jack, I would suggest that you do not have sufficient audio drive. That is the normal behavior of Elecraft products in digital modes when the audio drive is low. If you are following the typical 'wisdom' of using the audio level to control the output power, forget that - the Elecraft transceivers are different in the way they control power, and that method will not work. It will produce exactly the symptoms you state. For the K3 and KX3, adjust the audio so the ALC meter shows 4 bars solid and the 5th bar solid, then adjust the power knob for the desired power level. If you have a K2, set the LED display to show ALC and adjust the audio until you see 1 bar of ALC, then back down the audio until that bar just goes out. Again, adjust the power level with the power knob. 73, Don W3FPR On 7/31/2014 8:57 PM, Jack Berry via Elecraft wrote: I notice on MARS frequencies (slightly outside ham bands) that my power output starts out low and builds to full output over 10-20 seconds of transmit. The symptom is easily observed during an MT63 transmission and receiving stations comment that my signal starts out light and builds to a strong signal as the transmission progresses. I have run the calibration routine several times into a dummy load and all seems to go well but the problem persists. I see the same symptom in some ham bands but to a lesser extent, perhaps starting at half power and coming up to full power in a 10 seconds. __ 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
