The limitation of using RIT/VFO for pitch adjustment is that it will
move the signal out of the narrowed passband of the filter or APF. A
pitch control will adjust the signal's pitch over a wide range even
after it has been centered in a very narrow filter.
My understanding is that the K4 will allow you to hear the pitch of the
signal as it is adjusted. (The K3 PITCH control masks the signal while
being adjusted, so you can only hear the effect on the signal when you
disengage it.)
73,
Drew
AF2Z
On 03/15/21 14:26, KENT TRIMBLE wrote:
Just a personal observation, but for me, anyway, the optimum pitch varies.
What seemed optimum yesterday is different today.
What seemed optimum this morning won't be optimum this evening.
What seemed optimum on one rig is not optimum on another rig.
What seemed optimum on 20 meters is not optimum on 80 meters.
What seemed optimum from speakers won't be optimum from headphones.
And most importantly, what seemed optimum during one QSO won't
necessarily be optimum during the next QSO.
That's why RIT is such a valuable receiver accessory. After zeroing the
transmitter to the incoming signal, the RIT is adjusted for wherever the
peak seems to be at that given moment.
And continual re-adjustment may be necessary as QSB, QRN, signal
polarity, signal drifting, and other factors come into play.
For me, anyway, that's the way it seems to work.
73,
Kent K9ZTV
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