> The K3's internal keyer does have a weight control which varies the > dot:space ratio. This is not the same as the Logikey's K parameter, > because the K lengthens the > elements by a constant amount regardless of speed (the Logikey also has a > weight adjustment if you wish).
Same here. I use a microHam CW Keyer with K = 3 to compensate for a slight bit of "dit shortening" with the K3. The dit shortening is less problematic in the "Old QSK" versus the "New QSK" menu mode. I would love to see variable K compensation added to the K3 that would function on both the internal keyer as well as an external keyer. Adjustable rise/fall CW would be a very welcome addition at say 4 ms to 8 ms in 2 ms increments. Part of the issue is in determining how to calculate the rise & fall time of the keyed envelope. This becomes more critical as CW rise/fall times lengthen. Myself, I would calculate the keyed element length by referencing the mid-point of the slope. K compensation would then be added or subtracted from there. If you calculate the keyed element length at the point where the CW RF waveform just begins to rise and continuing all the way to the point where it has completed falling to zero, then the K3 is dead-on when referencing an external keyed closure. But, that's not a practical method of determining keyed waveform duration with a raised cosine slope. Again, referencing the rise/fall points mid-slope is probably the best compromise with ramped up/down keying. If we had that control, we could then put our keyers back to K = 0 where they really belong. Paul, W9AC ______________________________________________________________ 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
