Option 4 is the high performance beam tube which traded shorter life for better performance. It referred to the original tube shipped with the standard
Not sure about j15 Sent from my iPhone > On Nov 6, 2014, at 5:34 PM, Wayne Holder <[email protected]> wrote: > > Thanks for all the great suggestions. I was able to unplug and remove the > battery and, as suggested, also removed the center PCB (battery charger?/ > cutover switch?) > > The back of the unit indicates it has three options installed. Option 3, > option 4 and option J15. Option 3 seems to be the combination of the > battery option and the time standard option (PPS, etc.), but I'm not sure > what option 4 and option J15 are. Can anyone tell me? Also, the first two > option stickers (3 & 4) look like they were put on at the factory, as they > match the serial number label in style (see attached photo.) However, the > option J15 sticker is a completely different color (blue) and put only > slight askew, although it does say "Hewlett Packard" on the bottom of the > label. > > AS for the suggestions about leaving the unit powered up for a few weeks, > or more, so it can pump down; I'll give that a try. However, before I > power it up, do I need to check anything in particular (cables, switches, > etc.) to make sure it's ready to be turned on? I'd hate to break it just > because I didn't know some needed startup voodoo. > > Wayne > > [image: Inline image 1] > >> On Thu, Nov 6, 2014 at 10:01 AM, paul swed <[email protected]> wrote: >> >> Pete thats quite a hint on the official fumes measurement scale. >> Frankenstein takes a solid 24 or so hours to your one. So it seems on the >> CS scale of life you are fumes and I am wisps. The meter shows just about 0 >> photo. Very tough to work with have to play games with meter amplifiers and >> such. >> But I do get the green and the darn thing does lock on its own with >> reasonable 2nd harmonic. >> So there you go Wayne. Always hope. >> Regards >> Paul >> WB8TSL >> >> On Thu, Nov 6, 2014 at 12:54 PM, Pete Lancashire <[email protected]> >> wrote: >> >>> If after say a week and the current does not go down, there is one more >>> thing you can do before you have a tube that qualifies as a door stop. >> You >>> replace the internal HV supply with 3,500V @ 5 mA I had to do this on >> mine. >>> Keep doing it a few minutes at a time, took something like 3 hours. >>> No drop in current until the very end and all of a sudden the current >>> starting going down. I put the tube back in the 5061A and after the >> current >>> dropped there was enough Cs left to get the thing to work. Just like Paul >>> I'm sure there is very little left. >>> >>> I turn it on every 3-4 months and let it run for about an hour. The last >>> few times it took a while to lock and go 'green' >>> >>> -pete >>> >>> >>> >>> On Wed, Nov 5, 2014 at 11:21 PM, 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.
