[time-nuts] FE 5680A Warning

Don Latham djl at montana.com
Sat Nov 12 12:46:04 EST 2011

I just bought a couple of 5680A's that have the same FEI p/n. They are
pop-riveted to a heavy double-sided board., obviously cut off from a
longer board. I've removed one of these from it's board/heatsink. There
are two pots on the board, only one of them can be trimmed with the case
on. The sinewave forming filter and maybe countdown chips are not there,
and never were. There are three identical voltage regulators on the
heatsink spine.
I'll be doing some more reverse engineering on these units; they were so
cheap I had to have a couple! If only FEI was more helpful! hey must
have moved on from these, and could put one manual out there?
Oh Well!

EWKehren at aol.com
> The FE 5680A's advertised as NEW are not NEW!  A  friend  that  made me
> aware of the sale did notice clear signs of use, so I did a  closer
> inspection
> under a Microscope and found clear indications that the unit  has been
> bolted down in the past. Does work fine and I am looking at ways to go
> directly
> to the C field to disciplin the Rb. Does any one have info that would
> help
> to do so.
> Bert Kehren  Miami
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"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell

Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304

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