+++++++++++++++++++++ See also K2 WAOF +++++++++++++++++++++ Date: Tue, 16 Jul 2002 04:45:46 -0700 (PDT) From: Marc To: elecraft at mailman.qth.net Subject: [Elecraft] 40M/PLL Cal works... Hi all, Last night I removed the 'mod' for U4 pin 1 and 2 (10 pF cap across pins) and now the K2 passes the CAL PLL routine. With the cap installed, the CAL PLL freq starts at 10973 (and fails). Without the cap installed, the CAL PLL starts at 12013 and passes... I'm not sure why, since before you run CAL PLL, you can run CAL FCNT and the probe reads the right frequency on TP1 (VCO). When you run CAL PLL, the frequency jumps over 1 MHz down and the routine fails... Anyone else install the 10 pF cap and then tried running the CAL PL routine?? Thanks, Marc >I received a couple of direct e-mails about the issue >described below. To be clear, the freq probe is >working (it reads the BFO freq properly as well as TP1 >(VCO) when using CAL--FCNT) as best I can tell. I am >also on 40 meters. The best I can say is that the >calibration is failing because the PLL steps are out >of spec (maybe?) or in some other way not responding >like the software calibration routine wants.... ++++++++++++++++++++ From: "Joe Malloy" To: "Marc" , Subject: RE: [Elecraft] 40M/PLL Cal works... Date: Tue, 16 Jul 2002 08:05:32 -0400 Yup, I had this problem too, about six months ago. I couldn't figure out what I was doing wrong -- I just couldn't CAL PLL at all. Then I remembered putting in the cap (which didn't help my WAOF problem at all), removed it and voila - success! By the way, I'm still open to suggestions about curing my WAOF problem...but it's not crucial, I don't operate on 7185 anyway (never have and don't see much of a reason to start). If that's the price I have to pay for having a K2, by gum, that's alright by me! 73, Joe, W2RBA > -----Original Message----- > From: elecraft-admin at mailman.qth.net > [mailto:elecraft-admin at mailman.qth.net]On Behalf Of Marc > Sent: Tuesday, July 16, 2002 7:46 AM > To: elecraft at mailman.qth.net > Subject: [Elecraft] 40M/PLL Cal works... > > > Hi all, > > Last night I removed the 'mod' for U4 pin 1 and 2 (10 > pF cap across pins) and now the K2 passes the CAL PLL > routine. > -- snip -- ++++++++++++++++++++++