Re: QCX classic 40METER key click
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Note also that there were firmware versions which addressed key click issues. So check the firmware version on your QCX and check the firmware revisions history to see if anything affects it. It could be a matter of updating the firmware.?
73 Hans G0UPL
Howard. If you are talking about actual key clicks on the transmitted signal that others would hear as wider than normal CW reception, then you need to look at the key shaping circuitry around Q6, like R41, R42 and C31. If you are instead talking about a clicking sound in your own sidetone when you key the radio, then you might look at changing C21 and C22 from 10 uF to 1 uF as was done in Rev 4 and Rev 5 boards.?
Good luck .. 73 .. .Ron
On Sun, Jan 12, 2025 at 9:51?PM Howard Lamhut via <Howardlam= [email protected]> wrote: I have the QCX classic 40 m PC board revision 3… I have seen some topics on this issue but it was on the revision 5 version which has different capacitors than the revision 3 board.
I may be thinking of selling this in the future but I thought it would be interesting to see if I can eliminate the key clicks before I sell it.
thank you everyone.
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