Would it help the tests to engage the pre-amp? ie make things more challenging.
David G3UNA On 12/05/2012 17:22, Joe Subich, W4TV wrote: > > On 5/12/2012 12:17 PM, Ted Bryant wrote: > > Was v4.51 sent to the 4.50 testers? > > Apparently not all (I had to request it). > > I've been doing some crude testing ... with 4.51 AGC THR = 15 is > approximately -73 dBm/S9 (to the best of my ability to measure with > the XG3 and step attenuator). > > With high values for AGC THR it is important to use higher values of > AGC SLP otherwise a sudden very strong signal will drive the audio > amp and/or headphone amp into severe distortion - particularly if the > AF Gain is high. > > I'm finding AGC THR in the 12/13 range and SLP in the 8/10 range is > very comfortable and seems to "open up" the K3 receiver. The only > problem is that my poor antennas don't given me enough strong signals > to really evaluate strong signal pile-up with off air signals at the > higher thresholds. > > 73, > > ... Joe, W4TV > > > On 5/12/2012 12:17 PM, Ted Bryant wrote: >> Was v4.51 sent to the 4.50 testers? If so, I missed it. >> >> The major difference I've noticed with 4.50 is that cw signals, especially >> the low level ones, now seem much "cleaner". >> >> 73, Ted W4NZ >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]]On Behalf Of W0MU Mike Fatchett >> Sent: Saturday, May 12, 2012 11:22 AM >> To: [email protected] >> Subject: Re: [Elecraft] MCU 4.51 NB >> >> >> I did not mean to imply that the NB had changed from 4.50 to 4.51. My >> comment was from 4.48 to 4.5X. >> >> I can see how you read it differently though. >> >> I have not noticed a change in the NB from .50 to .51 >> >> Mike W0MU >> >> W0MU-1 CC Cluster w0mu.net >> >> >> On 5/12/2012 6:30 AM, Toby Pennington wrote: >>> Mike, you could be correct. This morning I seem to have a little >> distortion in the NB which I did not notice before. It's not bad, but a >> little is there. >>> I may go back to 4.50 just to check it out. >>> >>> Toby W4CAk >>> >>> >>> >>> I just got it tonight. I have not had much chance to compare but the NB >>> in 4.50 is much better! A curious unexpected side effect! >>> >>> Mike W0MU >> ______________________________________________________________ >> 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 > ______________________________________________________________ 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
