[Elecraft] K3 VFO Tuning Noise

[wa9fvp]

The noise your hearing is caused by the frequency synthesizer, PLL trying to
acheave lock.  When you turn the tuning dial, the PLL circuit switches to
the new frequency.  The transients caused buy the frequency change creates a
small frequency jitter that increases the noise floor.

A lock/unlock signal from the PLL circuit can be used to mute the audio
during the tuning steps but muting process can also create noise.  The K3's
receiver noise floor is so low on 6 meters that the tuning transients are
well pronounced.

Jack WA9FVP
Willco Electronics.



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Jack WA9FVP

Sent from my TRS-80 :-)
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