To get clean keying (especially at high speed) you need a fairly large gap, and actively bash the key up and down, as it keeps the contacts clean. Using a narro

To get clean keying (especially at high speed) you need a fairly large gap, and actively bash the key up and down, as it keeps the contacts clean. Using a narrow gap results in a very scratchy signal with lots of contact bounce.. To put it another way, it's the snap action caused by the momentum in your wrist that gives clean keying. Just tapping the key results in scratchy morse which has no rhythm and is hard to copy. You must actively lift the knob (with your thumb under the knob) as well as pushing it down.