John, I must ask - how did the receiving station know he was actually tuned to your frequency if he did not tune for the best sounding voice. If both of you were relying on the indicated frequency of the tranceiver, there are two places for error to creep in - his transceiver calibration and your K2 dial calibration - either are suspect - amateur transceivers are not precision frequency counters and you said the error was only 40 Hz. Be aware that 20 Hz accuracy is about the best that you can expect from the K2 and many other transceivers even when they are properly calibrated.
Before you do anything, I suggest that you check the dial calibration on your K2 against WWV. 40 Hz is not a lot - if it were 400 Hz, that might be something to be concerned about, but 40 Hz is almost 'on frequency'. You will likely have to tune WWV with precision, and the only way I know to get closer than 30 Hz is to use Spectrogram to observe the 500 and 600 Hz tones. Perhaps some folks with perfect pitch can get closer than 30 Hz, but I certainly can't without a pitch measurement tool. If you find your Dial Calibration OK, then yes you can shift the BFO by 40 Hz and correct your problem. Should you find your Dial Calibration off, you should start from the beginning step of setting the 4 MHz reference. If you need guidance in doing that as well as setting the filters/BFOs, you can find additional information and suggested procedures at my website http://w3fpr.qrpradio.com 73, Don W3FPR > -----Original Message----- > > I continue to struggle to get my KSB2 to sound as good as other > rigs. I've > heard other K2s on the air and know it's my individual problem. > > I was testing today on 7265 LSB trying out two different mikes - > Elecraft MD2 > and Ten Tec 706. The station listening said: > > - the Ten Tec has no lows and lower output > > - the MD2 sounds too bassy and muffled > > - the MD2 sounds fine if he tunes up 40 hz from my frequency > > Based on this, I recorded both from the audio on a separate > receiver. I agreed, > the MD2 sounded bad on frequency, but sounded normal if I tuned > up about 40 hz. > The Ten Tec had no lows and changing frequency made little > difference. But, it > took more voice to trip the VOX with the Ten Tec. > > Would this be due to my filter setup? > Will adjusting the OP1 filter bring my transmit frequency back? > Do I need to move the filter up or down? > Will changing KSB2 R14 from 1k to 2-3K help the Ten Tec mike > drive the KSB2? > > All help greatly appreciated. > > 73 de NA8M > John > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
