actually all good advice but allow the pump to work for at least 2 weeks On Thu, Nov 6, 2014 at 8:39 AM, Scott McGrath <[email protected]> wrote:
> The datum tubes are fairly common as they were significantly less > expensive than HP/Agilent tubes and lasted longer > > First thing as JL notes is to remove battery and charger > > Just power it up and monitor the ion pump value on the test meter if it > drops to zero fairly rapidly the tube may still be good > > Depending on length of storage this may take up to a week to settle to zero > > > > Sent from my iPhone > > > On Nov 6, 2014, at 7:54 AM, "J. L. Trantham" <[email protected]> wrote: > > > > I agree. Plug it in and see what happens although I would probably > disconnect and remove the NiCd batteries and inspect for and clean up any > leakage issues. I would also remove A2, the battery charger board, until > initial tests are completed. A2 is the center board seen from the bottom. > > > > I suspect the plug you have is correct. You probably have to > disassemble it, rotate the 'insert' to the proper orientation for the > socket on the back, 'file out' a small 'ridge' in the proper 'orientation > groove' on the 'insert' that will allow the 'insert' to be reinstalled in > the 'housing', then reassemble the plug. Make sure the electrical pins and > sockets 'line up' (A to A, B to B, and G to G) between the insert and the > socket on the back of the unit. I had to do that on mine. > > > > Good luck. > > > > Joe > > > > -----Original Message----- > > From: time-nuts [mailto:[email protected]] On Behalf Of Azelio > Boriani > > Sent: Thursday, November 06, 2014 6:39 AM > > To: Discussion of precise time and frequency measurement > > Subject: [Bulk] Re: [time-nuts] New Guy, has HP 5061A with DATUM 7105A > tube seeks advice > > > > It is not uncommon that replacement tubes are not the original ones. See > here: > > <http://www.gigatest.net/datum/cesium_tubes.pdf> > > You can't do anything else than plugging it in and check the various > voltages. If there is any life left in the tube and the ion pump is > working, you can even experience a locked status in hours (tens of hours, > maybe). > > > >> On Thu, Nov 6, 2014 at 8:21 AM, Wayne Holder <[email protected]> > wrote: > >> I recently picked up a 5061A surplus, but have no idea whether it > >> works or not. The first hurdle is getting a power cord, but I'm still > >> waiting for the proper connector to show up (the first one I ordered > >> had the wrong orientation on the 3 pins.) In the meantime, I've been > >> reading though what materials I can find online in order to figure out > >> how to try and safely turn it on and see if the tube is OK, or dead. > >> > >> However after removing the top cover, I can see that my unit doesn't > >> seem to contain the typical kind of cesium tube assembly I see in the > >> HP docs I've found online. Instead, it has a tube made by DATUM with > >> the following markings on the label: > >> > >> Model: 7105A > >> Serial: 9951991226 > >> Part No: 03667-501 > >> Oven Temp: 92 degrees C > >> Oven Monitor Therm: 101 Ohms > >> EMV: 2000 DC > >> NSN ______ 5960 01214 7475 > >> > >> Can anyone tell me about this model and why it might have a DATUM tube > >> rather than the kind I see in the HP oc? Also, any advice on how to > >> safely check it out? > >> > >> I bought this thing out of curiosity but, upon looking inside at all > >> the various dials and switches and multi-turn potentiometers, I find > >> I'm rather intimated by it, even though I have a fairly decent > >> background in electronics. > >> > >> Wayne > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
