They are tempting -pete (looking at bank account)
On Sat, Nov 12, 2011 at 10:07 AM, <ewkeh...@aol.com> wrote: > I have done some more checking and identified the C field pins: one has > 2.5163 V, the other 2.5294 V. Would be nice to know which one gets varied in > units with C coil adjustment. Xtal Osc. is 60 MHz on this unit. Also has an > AD 9832 in it, unit is specked at 25 MHz so it does not run off the 60 MHz. > Bert Kehren > > > In a message dated 11/12/2011 12:46:36 P.M. Eastern Standard Time, > d...@montana.com writes: > > 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! > Don > > ewkeh...@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 >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > -- > "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 > www.lightningforensics.com > www.sixmilesystems.com > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
