Phillippe, You state the mic gain setting and the compression, but for the K3, the most important setting is to obtain 5 to 7 bars on the ALC meter with the compression turned to zero. If that is not done as the first step, then the K3 cannot properly control its power output.
After setting the mic gain level for those 5 to 7 bars, then increase the compression to whatever you want. You may want to recheck to be sure your mic gain is set correctly (even though an SSB bug apparently came along with 4.17. BTW, thank you for trying the beta firmware - it is good to give Elecraft feedback on problems like this one. While I am not saying this is your problem, we need frequent reminders of this initial requirement because many instructions for amplifiers and for digital interface boxes (use 4 to 5 bars for digital) will lead you to believe that you should control power output with the mic gain setting. While that is true for many transceivers, it is not good advice for the K3. From the many posts on the reflector, there was a problem for SSB power output (bug) that happened in MCU 4.17, and Wayne has said he is working on it. 73, Don W3FPR On 11/5/2010 1:45 PM, Philippe Trottet wrote: > After many tries, on Dummy load first then with distant Ham friends, > conclusion was to re-installed MCU 4.14. > Instead of giving the same dynamic with the MH2 microphone, with my Amp on, > using 12w drive, using Mic=2 COMP=20, pronouncing the number 6 slowly, I have > seen immediately the difference. > For me, using a Amp w/GU84B tetrode, 12w drive on ssb give 500~600w on normal > voice operation. > With MCU 4.17 it gave only 300~400w and the power increase with difficulty on > a single whistle to 500w. and when I pushed to maxi drive 65~70w I was unable > to achieve the normal 64dBm+ of the Amp with normal voice. > Normal cw tune procedure seems not affected and I can achieve the maxi as > normal. > > The most important: > It has been reported to me during the test on the air, some alteration of the > modulation, like a RFI ground phenomena on the microphone or like a under > voltage problem during transmitting. > I've checked all connections from A to Z and no problem founded. re-load > 4.17, installed it 2 times, with no changes. > When re-installing the MCU 4.14 everything is back to normal with the very > clear voice provided by the K3. > Sure Wayne will share with us what's happened, .APF is a so great add-up in > weak signal environment ! > Bst 73's > Philippe A65BI > ______________________________________________________________ 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
