Evert - so I am among fine company. This justfies my mental state, either I am not at all crazy or I have found one soul to share my specific malady.
I am comparing K3 #272 and K3 #2308, and the latter K3 is the "hotter". The both play so well, at first it was hard to decide which one was "affected". ;-) My difference can be as much as 20db. K3 #272 has the HAGC mod. Either the calibration department at Elecraft is having some bad days, or an unknown variation in parts is causing this. I hesistate to post issues to the email list without a conversation with Elecraft but in this case maybe we have stumble upon something they don't know. Cheers, Don --- On Mon, 3/16/09, Evert Bakker (PA2KW) <[email protected]> wrote: > From: Evert Bakker (PA2KW) <[email protected]> > Subject: RE: [Elecraft] "Hot" K3 > To: "'Don Rasmussen'" <[email protected]> > Cc: "'Elecraft Discussion List'" <[email protected]> > Date: Monday, March 16, 2009, 11:57 AM > Hello Don, > > I do have a similar effect except that my first and second > radio is a K3 > (SN-0812 and SN-2185). > > - Same power-supply at the same time radio's ON > - both on 50 Ohm dummy load > - same roofing filter (2.7 Kc) > - same filter gain (0 dB) > - same DSP setting (Bw = 3.0 Kc / Fctr = 1.5 Kc) > - same rx equilizers > - same AGC settings (AGC-F, THR=6, SLP=5) > - no S-meter changes (settings are factory default) > - same RF gain setting > - KRX disabled in SN-2185 > - Both KANT 3 disabled and ANT 1 selected > > Result : 2 to 3 S-units difference (+/- 15 dB) on > "internal" noise > difference. This was the first test on 15 meter) > > That's a lot. How come? > > I can't say anything yet about the sensitivity. I will > try to find someone > with a "calibrated" signal source and make > conclusions. > > It might all be differences in gain, but first of all I > have to gain > confidence... > > Has one of you a good suggestion a-priori? > > 73's, Evert PA2KW > > > > ______________________________________________________________ > 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
