> It's easy to test. Just program a memory keyer (etc.) and > crank up the speed. In my > opinion it has to do with the CPU being busy. Mmmm, I hear what you mean by toggling QRQ mode on/off while sending. Around 44wpm and up, the dots become shortened in normal mode but sound fine in QRQ+ mode. I hadn't noticed that before. Tnx. 73 Gary ZL2iFB