With the Huff&Puff circuit I think that it constantly jumps the VFO
frequency up and down as It looks at the counter output low digit (one
and zero). If one it changes the frequency to get a zero and if zero
adjusts to get a one. Does this "little" frequency change cause phase
noise from the VFO oscillator??
Given the dirty output of affordable DDS VFOs the Huff&Puff seems like
a great idea except for my non-engineering curiosity.
Dick N3HKN
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