Hi Don, Mike, et al. Thanks for the advice.
Using spectrogram I checked filter alignment for all filters and then reworked them all. Now, the DAC for each of the filters in CW is BELOW the center frequency and the DAC for each of the filters in CWR is ABOVE the center frequency. However, when I tune identical signals on my TS-820S (factory calibrated a couple of years ago) all the signals are about 1 KHz higher on the 820. Before I crack the case and see if I put the board in backwards, or something, would you please comment on the following: As I tune up the band (to higher frequencies) on 40, the pitch of the received signal goes up. On the 820, the pitch goes DOWN as I tune up the band. Frustrated in VA (but it IS Miller-time) Tom, kj3d -----Original Message----- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 11, 2007 11:01 AM To: KJ3D Cc: [email protected] Subject: Re: [Elecraft] Backward CW? Tom, I believe you asked the right question. Assuming that your filters are set so you do hear a signal at the sidetone pitch on both CW and CWr, do the following - (if not, you should do the whole filter setting task - see the 3rd paragraph below). To see if your filters are set to the correct side of the carrier, you should enter the menu for CAL FIL, then tap the BAND- button. You can see the DAC values for both CW and CWr - for each of the 4 filters, the DAC value for CW should be lower than the one for CWr. If that is true, then you have the BFOs set to the correct sideband. If you have the counter probe installed in TP2, you can read the actual BFO frequency by tapping the DISPLAY button. If you find the BFOs on the wrong sideband, you must open the K2 and connect the K2 frequency counter probe to TP2 to change the settings. The K2 manual contains information for entering the menu and the related 'button-tap/hold' sequences to get to the CAL FIL menu - if you are not familiar with that part of the task, please review that portion of the manual first (if you built your K2 you already know how to do it). Should your filters/BFOs need changed, I recommend you use Spectrogram to give a visual display of your filter passbands. Spectrogram version 5 (the last freeware version) and how to use it info is available at Tom Hammond's website www.n0ss.net and if you want to accomplish a full K2 dial calibration job while you are in the process, check out my website http://w3fpr.qrpradio.com article on K2 Dial Calibration. If you do not wish to do the full task, you can simply set the filters to the settings indicated in the KSB2 manual (if you have that option installed) or in the K2 manual if the KSB2 is absent. It is not difficult, I am just trying to be complete here with some consideration for brevity. 73, Don W3FPR KJ3D wrote: > Well here comes the probably-stupid-question-of-the-day: > > After nearly 90 minutes on the NAQCC sprint last night - sending and > answering dozens of calls, some from pretty strong signals - without a > single contact, I gotta wonder if the problem is on my end. > > How can I tell if my carrier is on the correct side of zero-beat? > > Then how do I fix it? > > Have I even asked the right question? > > Thanks es 73, > > Tom, [EMAIL PROTECTED] _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
