Re: [Elecraft] K3 RF Gain control reduced range after RF gain calibration
* On 2011 20 Dec 23:22 -0600, hb9brj wrote: Nate, Take a look at a similar problem (and its solution) I had some time ago: http://elecraft.365791.n2.nabble.com/K3-Rf-gain-tracking-main-vs-sub-tp5668917p5676134.html Thanks, Markus. I do recall that thread now. I was just after I got my K3 on the air and was too busy learning other things to pay attention. After reading the thread I didn't see a definite solution and that it was being investigated. I think I'll try with the service monitor again this evening and see what happens. 73, de Nate N0NB -- The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true. Ham radio, Linux, bikes, and more: http://www.n0nb.us __ 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
[Elecraft] K3 RF Gain control reduced range after RF gain calibration
This is strange. In an effort to better align the P3's idea of signal strength with that of the K3's, I performed the K3 RF Gain Calibration, then the S-meter calibration and finally the P3 level calibration. I did the calibrations at 7040 kHz using a service monitor as the signal source for 50 uV and 1 uV sources following the procedures in the manuals. This evening after tuning to 75m for the section nets, I set the RF Gain control to its usual 2 O'clock setting and realized the background noise was still quite pronounced. I found that I have to turn the RF Gain control to between 9 and 10 O'clock to reduce the noise as before at 2 O'clock. Also, the S-meter level no longer reflects the change as the RF Gain is reduced. Before putting the RF Gain control fully CCW resulted in the S-meter reading full scale (changine the S-meter mode to NOR or ABS and resetting the calibration values had any effect). Switching to a dummy load reveals that as the RF control is reduced that the S-meter bars light to about S4 and no higher regardless of how far CCW the knob is turned. I've also noticed that with the control fully CCW that the receiver is not completely muted (I think it was before, but not sure). I did goof on the first run through the RF Gain calibration by having the control reduced slightly--around 4 O'clock--and not fully CW as stated in the manual. Yup, my error from being in a hurry. I realized the mistake and ran the routine again with the RF Gain control fully CW. I used the Linux K3 utility 1.4.1.8 and had the P3 inline and on while I performed the calibration. Was having the P3 on at the same time a mistake? I also reloaded all of the firmware--MCU 4.39, FPF 1.14 and DSP1 2.73 with no change in behavior. Thanks! 73, de Nate N0NB -- The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true. Ham radio, Linux, bikes, and more: http://www.n0nb.us __ 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
Re: [Elecraft] K3 RF Gain control reduced range after RF gain calibration
Well, I think I solved the issue. I reset the RF Gain back to factory defaults with the K3 utility and then set the S-meter to NOR and SMTR OF and SC to the factory defaults. It appears the RF Gain is back to normal. Perhaps it's best to leave this stuff well enough alone! 73, de Nate N0NB -- The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true. Ham radio, Linux, bikes, and more: http://www.n0nb.us __ 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
Re: [Elecraft] K3 RF Gain control reduced range after RF gain calibration
Nate, Take a look at a similar problem (and its solution) I had some time ago: http://elecraft.365791.n2.nabble.com/K3-Rf-gain-tracking-main-vs-sub-tp5668917p5676134.html 73, Markus HB9BRJ -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-RF-Gain-control-reduced-range-after-RF-gain-calibration-tp7113809p7114181.html Sent from the Elecraft mailing list archive at 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
