Generally a chirp would be due to an unstable power supply, resistance in the fuse holder, etc.. It can also be cause by poor decoupling/loading of the oscillator circuit, but in the case of a well-designed circuit like the K2, this would normally only arise with misplaced components or poor connections.
On Tue, 14 Jul 2020 at 18:01, Victor Rosenthal 4X6GP <[email protected]> wrote: > A chirp can't be seen visually on an oscilloscope (well, maybe on a > panadpter or spectrum analyzer if it is a very big one). > > A chirp is a change in frequency of the transmitted signal. It is not > the same as a click, which is a wide signal caused by too-short rise and > fall times of the keyed envelope, or a badly shaped envelope. You can > see the envelope shape on an oscilloscope. But the change in frequency > caused by a chirp is very small in comparison with the frequency of the > signal. > > The way to detect a chirp is to listen to the transmitted signal on a > second receiver. Your ear is very sensitive to changes in pitch. > > 73, > Victor, 4X6GP > Rehovot, Israel > Formerly K2VCO > CWops no. 5 > http://www.qsl.net/k2vco/ > . > On 14/07/2020 9:29, dl2ki wrote: > > Hi, > > > > since someone told me that there is a small "chirp" in my K2-CW signal, I > > would like to check the signal visually. > > > > How can I display the CW Key envelope as shown in the document "Elecraft > K2 > > Keying Modification Instructions", page 1. > > > > An oscilloscope "Tektronix 2465A" is at my disposal, but I have little > > experience with measuring instruments, since I only use them > occasionally. > > > > Thank you and 73 > > Wolfgang > > DL2KI > > > > > > > > > > -- > > Sent from: http://elecraft.365791.n2.nabble.com/ > > ______________________________________________________________ > > 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 > > Message delivered to [email protected] > > > ______________________________________________________________ > 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 > Message delivered to [email protected] > ______________________________________________________________ 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 Message delivered to [email protected]
