[Elecraft] RE: VFO Moving in steps

[Don Wilhelm]

The last person I dealt with who had a similar problem found that it was
cured when he re-soldered things on the Control Board.  Check your soldering
everywhere, then check soldering and finally, check soldering.

A logic probe is a good choice to see where the bits are being lost.

73,
Don W3FPR

----- Original Message ----- 

> The steps vary Bob, what seems to be happening is the PLL is getting
> programmed by the MCU but the incremental updates provided by the DAC
which
> shifts the reference osc around does not seem to be there. I was hoping to
> find a logic probe at the local emporiums of electronic parts, but none
have
> one. I see the effect of what I think is going on, but difficult to
trouble
> shoot because the cause just isn't there very long, ie signals SCO, SCK
and
> DAC2SEL.
>