Hello Vic I think to demonstrate the magnitude of the problem I am going to have to measure the audio level and compare it to a side tone at a particular setting. Or, perhaps, make a recording and send it over for evaluation. However, a qualititive statement might do for now: at side tone (monitor) level of 12 which I find a happy state to listen to with real signals it is extremely intrusive and obliterates real signals coming through between elements. Monitor would have to be near to maximum with audio below listening levels for real signals to make the ratio even approach satisfactory levels.
If no-one else is getting this, it must be a faulty component. I look forward to hearing others' experience. David G3UNA > > > David Cutter wrote: > > This is a re-post to see if it attracts comment. > > > > This concerns an audible artefact using QSK cw mode. When either rf > > gain or af gain are at maximum, there is an additional noise which > > accompanies the Morse characters. > > I've noticed the phenomenon that you describe, but it's not exactly an > artifact. Looking at the audio output with a scope shows an absolutely > clean transition between noise and sidetone, or, if the sidetone is > turned down all the way, between noise and silence. > > As the sidetone gets louder with respect to the noise, which occurs when > you turn the sidetone level up or the audio or RF gain down, you hear > less 'artifact'. > > What I think it is is sort of an auditory illusion caused by the rapidly > pulsing noise, and maybe the sharp rise/fall times of the noise pulses > in between keyed elements (not the sidetone, which is shaped nicely). > > I've suggested to Wayne and Lyle that they look at the way they ramp the > gain up and down in QSK, and Wayne has discussed the possibility of > making the tone quality of the sidetone user-modifiable. Maybe they will > look at this when they are done with more urgent matters. > > In the meantime, if it bothers you, just change the balance between the > signal audio and the sidetone. > -- > 73, > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco > ----------------------------------------- Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam _______________________________________________ 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
