On 2012-09-14 22:15, Ron D'Eau Claire wrote: > Key clicks are CW modulation sidebands. Key click management is about having > CW sidebands that occupy a reasonable amount of the spectrum, not > eliminating them entirely. Eliminating clicks (the sidebands) is easily done > - just don't key the signal. But then you can't send CW. > > 73, Ron AC7AC > Yes I know this Ron. You are quite right. You haven´t got this at all. I´m not talking about modulating anything. I know for a fact that transmitters can be keyed without producing key clicks that can be detected in a receiver using 250Hz bandwith with steep filters and tuning just outside that passband. Still the keyed CW signal is "hard" enough to be perfectly readable even if it´s weak. Clicks from a K3 can be heard approx 500Hz out from the passband null, in other words it is not click free. Now, the rise/fall time on a K3 is approx 5ms and the CW signal is quite hard (almost ringing) when listening to it. This is just fine from a communication standpoint but the price we pay are "mild key clicks". I have a feeling, if we just could increase the rise/fall to 6 or 7ms the K3 would be click free or more or less click free. IMO it´s a shame we can´t do this.
/ Jim SM2EKM ______________________________________________________________ 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
