I have K3 #995 with mcu3.41, dsp2.37 and I have kept up with all the factory audio mods to date. I swapped out my main dsp board for a new one from Elecraft in August. At the time I was running mcu3.25, dsp2.21 and after the swap I noticed improved low feq. response. I believe mcu3.25, dsp2.21 was the FW pre-release that had the surprise extended low freq response. With the latest firmware I am still enjoying improved low freq response and perhaps it is even a little better; based on my crude estimates using spectrogram16 while listening to AM broadcast band stations. Because of the timing of my dsp board swap with the loading of the latest beta firmware, I was never really certain what led to the improvement. Is it the hardware or the firmtware, or are both required for older K3's? Bob W9RFS
"The audio passband shift changes in the latest K3 beta firmware release served as a reminder that the K3 audio mods on N1EU's website needed updating. Barry recently made those changes and they're available through the link below: http://n1eu.com/K3/k3audiomod.htm Whether Elecraft is, or will in the future, offer a Main DSP Board swap-out program is best answered by Elecraft. Swapping the board is certainly much easier than changing multiple SMT parts for the affected Rx and Tx audio paths. My understanding is that the new Main DSP Board is already part of new K3s going out the door. However, I am unsure as to what S/N the cut-in occurred. Clarification from Elecraft on these points would be very helpful. Paul, W9AC " ______________________________________________________________ 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 -- View this message in context: http://n2.nabble.com/K3-Audio-Mods-tp3468900p3788355.html Sent from the [K3] 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
