w0mu wrote > What happens when you turn the AGC off and ride the rf gain? Do these > setting still have some effect or should they be set up differently?I > assume when you use 12/8/soft most people are using AGC-F?
Ken, When you experienced the mush, did you have the AGC ON, but the RF Gain set to max, as most people usually do with any other modern radio? In my experience, setting RF GAIN max *will cause unacceptable pileup mush in the K3*, even if you use optimal AGC settings.* When you can't pull apart a pileup, just back off the RF Gain until some stations start to stand out. You can leave the AGC ON all the time. For reference, here are my preferred AGC and other settings for contesting with a K3 and large CW pileups. Others have also reported success with these. First, set *CONFIG:TECH MD ON* to un-hide some AGC settings. Set CONFIG:TECH MD OFF *when finished*, to eliminate distracting values from accidentally appearing in the SubRx display (PLL1, AFV, dBV, etc.) *AF GAIN LO* -- Cuts audio hiss. May not work with all headphones. OK on Heil.*AF LIM 20* -- Only takes affect when AGC is OFF (rarely used)*AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups*AGC HLD 0.05* -- Slow AGC hold time (50 ms). Reduces AGC-induced IMD, recommended for pileups. Works with AGC-S only, no affect when using AGC-F.*AGC PLS NOR* -- Loud static pulses do not pump AGC*AGC SLP 010* -- A pretty "flat" AGC response curve. I may move this lower since pileups of loud guys can blend together, but I like this setting because it saves my ears.*AGC THR 010* -- AGC kicks in at about S-8. Signals lower than THR behave as they would with AGC OFF ( +1 dB of RF = +1 dB of audio)*AGC -F 120* -- Factory default fast AGC decay rate (recovery time). Higher = faster. Faster can be bad.*AGC -S 20* -- Factory default slow AGC decay rate (recovery time). Higher = faster. Faster can be bad.*RF GAIN at 3 O'Clock or less* except when all signals and band noise are very low (e.g. 10m)*AF GAIN* never higher than 3 O'Clock*AFX OFF**NR OFF**NB OFF**RIT OFF**XIT OFF*FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider or narrower.Use *AGC-F* or *AGC-S* for CW, whatever works best for you.Use *AGC-S* for SSB.CW Pitch 500 (or to taste)IF shift centered (on CW)500 Hz InRad 8-pole filter on CW2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move IF SHIFT lower for pleasing audio*)Use *XFIL* button to toggle between filters and reset the IF shift, rather than NOR (hold) button*PREamp ON* for 15m and up, *PREamp OFF* for all other bands Hope this helps. 73, Bob, N6TV -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Receiver-mush-tp7627277p7627323.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 Message delivered to arch...@mail-archive.com
