The KE7X Guide has an interesting discussion about the shortcomings of the K3's AGC in a CW pileup situation. I have complained about this AGC issue several times, but there has not yet been any effective solution.
The K3's AGC, even at SLP=0 and THR=8, compresses CW signals at too low a threshold and too flat a slope. Signals in a pileup are all mushed together by the AGC. It's not an IMD problem, it's a compression problem. The usual solution, turning AGC OFF, is thwarted by the AF Limiter's extreme distortion on even moderately loud signals, even at its max setting AF LIM = 030. If you have extremely sensitive headphones, and a very quiet shack, you can turn AGC OFF and turn the overall receiver gain down to where the AF Limiter rarely triggers, but one shouldn't have to jump through these fiery hoops. With a TS-850, you could turn AGC OFF, and a loud signal would not blow your ears off, and would not be severely distorted. If they could do that in 1989, it should be doable today. Dave Hachadorian, K6LL Yuma, AZ -----Original Message----- From: T Gahagan Sent: Tuesday, May 31, 2011 12:06 PM To: Elecraft List Subject: [Elecraft] New K3 guide by KE7X For those that don’t know about the new K3 guide by KE7X check out the link in this message. Fred has done an outstanding job of explaining many of the intricacies of the K3 that have puzzled me. Block diagrams and step by step instructions on just about every facet of operation are really helpful. Fred’s guide doesn’t replace the K3 manual by any means but it sure has helped me determine if I have my K3 set up properly for what I am trying to accomplish. I have no financial interest in this product but thought reflector members might like to know about this new offering. Todd, WA7U http://www.ke7x.com/home/guide-to-the-k3 ______________________________________________________________ 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 ______________________________________________________________ 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
