[time-nuts] FE-5680A C-field trimer ??

Brian Kirby kirbybq at bellsouth.net
Sun Aug 24 21:37:10 EDT 2008


There are several models of the 5680A.  A lot use the DDS circuits to 
set the output frequencies and  they do not have C field adjustments.

Brian - KD4FM

wje wrote:
>    Unless you can measure the frequency to at least a few parts in 10e10,
>    you won't see any change.
>    These devices are far more precise than standard frequency counters.
>    You either need something like an HP 5370 or 5371 to measure the
>    difference, or another equally precise oscillator to compare against
>    using a phase meter or your oscilloscope.
> Bill Ezell
> ----------
> They said 'Windows or better'
> so I used Linux.
>
>    Rex wrote:
>
> Have you adjusted it? I tried tweaking that pot on one I had and I
> didn't see any effect.
>
> wje wrote:
>
>
> There's a small hole on the side of the case.
> This is the trimmer access, at least on mine.
>
> Bill Ezell
> ----------
> They said 'Windows or better'
> so I used Linux.
>
>
>
> EMMANOUIL MANTZARAS wrote:
>
>
>
> Hi
> Is there any one that knows where is the c-field trimer in the FE-5680A board
> ??
> Thanks
> sv1bke
>
>
>
>
>
>
>
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