Greetings forum. Yes - I have performed this upgrade, having obtaineda 10811 / high performance option. While the complete original HP kit was not available, I salvagedthe 10->5 MHz divider/connection board from a 105Band re-designed the back PCB with the 2 x 15pole 3.96 pitch connectors and mechanics so that the design would be ableto fit into the 5065A chassis in a way that the10811 Coarse adjustment could be reached with a longadjustment tool directly. Picture(s) available upon request. I have the design files (Cadence Allegro) as well asGerber/Drill files for anyone that want to fabricate sucha back plate board. Please contact me off-list if you want thedesign files. Best Regards Ulf KylenfallSM6GXV

Hi everyone, Last month, I bought a 10811-60109 on ebay, it was sold with the complete oscillator assembly for a 5061A/B cesium clock. I bought it for the 10811-60109 because it has somewhat better specifications than a regular 10811. It was sold as a spare from military surplus. I've taken a quick look and it seems compatible with the older 5061A connections. I mean electronically, but I'm not so sure about the mechanical part. So it may well be such an upgrade kit, but for 5061. The PCB board doesn't seem complicated and HP basically used "jellybean" components on it. But as for the mechanical part, there would be some work to do. By the way, if somebody wants to do the upgrade for a 5061, I can basically give him/her the complete assembly. Minus the 10811-60109 of course :) Best regards, On Sat, Feb 12, 2022 at 2:10 PM Ulf Kylenfall via time-nuts <time-nuts@lists.febo.com> wrote: > > > Greetings forum. > Yes - I have performed this upgrade, having obtaineda 10811 / high performance option. > > While the complete original HP kit was not available, I salvagedthe 10->5 MHz divider/connection board from a 105Band re-designed the back PCB with the 2 x 15pole 3.96 pitch connectors and mechanics > so that the design would be ableto fit into the 5065A chassis in a way that the10811 Coarse adjustment could be reached with a longadjustment tool directly. > Picture(s) available upon request. > > I have the design files (Cadence Allegro) as well asGerber/Drill files for anyone that want to fabricate sucha back plate board. > > Please contact me off-list if you want thedesign files. > Best Regards > Ulf KylenfallSM6GXV > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. -- /* Lin Ke-Fong * anotherlin@gmail.com * I always do what I say, especially if it's something stupid. */

Hi You just might find that kit will drop into a 5065 with minor mods….. Bob > On Feb 12, 2022, at 8:39 AM, Ke-Fong Lin <anotherlin@gmail.com> wrote: > > Hi everyone, > > Last month, I bought a 10811-60109 on ebay, it was sold with the > complete oscillator assembly for a 5061A/B cesium clock. > I bought it for the 10811-60109 because it has somewhat better > specifications than a regular 10811. > > It was sold as a spare from military surplus. I've taken a quick look > and it seems compatible with the older 5061A connections. > I mean electronically, but I'm not so sure about the mechanical part. > So it may well be such an upgrade kit, but for 5061. > > The PCB board doesn't seem complicated and HP basically used > "jellybean" components on it. > But as for the mechanical part, there would be some work to do. > > By the way, if somebody wants to do the upgrade for a 5061, I can > basically give him/her the complete assembly. > Minus the 10811-60109 of course :) > > Best regards, > > On Sat, Feb 12, 2022 at 2:10 PM Ulf Kylenfall via time-nuts > <time-nuts@lists.febo.com> wrote: >> >> >> Greetings forum. >> Yes - I have performed this upgrade, having obtaineda 10811 / high performance option. >> >> While the complete original HP kit was not available, I salvagedthe 10->5 MHz divider/connection board from a 105Band re-designed the back PCB with the 2 x 15pole 3.96 pitch connectors and mechanics >> so that the design would be ableto fit into the 5065A chassis in a way that the10811 Coarse adjustment could be reached with a longadjustment tool directly. >> Picture(s) available upon request. >> >> I have the design files (Cadence Allegro) as well asGerber/Drill files for anyone that want to fabricate sucha back plate board. >> >> Please contact me off-list if you want thedesign files. >> Best Regards >> Ulf KylenfallSM6GXV >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > > > > -- > /* Lin Ke-Fong > * anotherlin@gmail.com > * I always do what I say, especially if it's something stupid. > */ > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

Good morning- My 5065A has a 10811-60109. I thought that was a standard and part of the reason they work so well? Best Regards, Bill On Sat, Feb 12, 2022, 7:21 AM Bob kb8tq <kb8tq@n1k.org> wrote: > Hi > > You just might find that kit will drop into a 5065 with minor > mods….. > > Bob > > > On Feb 12, 2022, at 8:39 AM, Ke-Fong Lin <anotherlin@gmail.com> wrote: > > > > Hi everyone, > > > > Last month, I bought a 10811-60109 on ebay, it was sold with the > > complete oscillator assembly for a 5061A/B cesium clock. > > I bought it for the 10811-60109 because it has somewhat better > > specifications than a regular 10811. > > > > It was sold as a spare from military surplus. I've taken a quick look > > and it seems compatible with the older 5061A connections. > > I mean electronically, but I'm not so sure about the mechanical part. > > So it may well be such an upgrade kit, but for 5061. > > > > The PCB board doesn't seem complicated and HP basically used > > "jellybean" components on it. > > But as for the mechanical part, there would be some work to do. > > > > By the way, if somebody wants to do the upgrade for a 5061, I can > > basically give him/her the complete assembly. > > Minus the 10811-60109 of course :) > > > > Best regards, > > > > On Sat, Feb 12, 2022 at 2:10 PM Ulf Kylenfall via time-nuts > > <time-nuts@lists.febo.com> wrote: > >> > >> > >> Greetings forum. > >> Yes - I have performed this upgrade, having obtaineda 10811 / high > performance option. > >> > >> While the complete original HP kit was not available, I salvagedthe > 10->5 MHz divider/connection board from a 105Band re-designed the back PCB > with the 2 x 15pole 3.96 pitch connectors and mechanics > >> so that the design would be ableto fit into the 5065A chassis in a way > that the10811 Coarse adjustment could be reached with a longadjustment tool > directly. > >> Picture(s) available upon request. > >> > >> I have the design files (Cadence Allegro) as well asGerber/Drill files > for anyone that want to fabricate sucha back plate board. > >> > >> Please contact me off-list if you want thedesign files. > >> Best Regards > >> Ulf KylenfallSM6GXV > >> > >> > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > >> To unsubscribe, go to and follow the instructions there. > > > > > > > > -- > > /* Lin Ke-Fong > > * anotherlin@gmail.com > > * I always do what I say, especially if it's something stupid. > > */ > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

Hi Again, there is no basic difference between the 10811-60109 and any other 10811 with the same basic pinout. ( They made two packages, one with an edge connector. Eventually they wrapped one up to put it in a GPSDO). The only difference between the 60109 was a test and select process back when it was made. Its been long enough since that test for it to be totally meaningless. Bob > On Feb 12, 2022, at 10:15 AM, Bill Notfaded <notfaded1@gmail.com> wrote: > > Good morning- > > My 5065A has a 10811-60109. I thought that was a standard and part of the > reason they work so well? > > > Best Regards, > > Bill > > > On Sat, Feb 12, 2022, 7:21 AM Bob kb8tq <kb8tq@n1k.org> wrote: > >> Hi >> >> You just might find that kit will drop into a 5065 with minor >> mods….. >> >> Bob >> >>> On Feb 12, 2022, at 8:39 AM, Ke-Fong Lin <anotherlin@gmail.com> wrote: >>> >>> Hi everyone, >>> >>> Last month, I bought a 10811-60109 on ebay, it was sold with the >>> complete oscillator assembly for a 5061A/B cesium clock. >>> I bought it for the 10811-60109 because it has somewhat better >>> specifications than a regular 10811. >>> >>> It was sold as a spare from military surplus. I've taken a quick look >>> and it seems compatible with the older 5061A connections. >>> I mean electronically, but I'm not so sure about the mechanical part. >>> So it may well be such an upgrade kit, but for 5061. >>> >>> The PCB board doesn't seem complicated and HP basically used >>> "jellybean" components on it. >>> But as for the mechanical part, there would be some work to do. >>> >>> By the way, if somebody wants to do the upgrade for a 5061, I can >>> basically give him/her the complete assembly. >>> Minus the 10811-60109 of course :) >>> >>> Best regards, >>> >>> On Sat, Feb 12, 2022 at 2:10 PM Ulf Kylenfall via time-nuts >>> <time-nuts@lists.febo.com> wrote: >>>> >>>> >>>> Greetings forum. >>>> Yes - I have performed this upgrade, having obtaineda 10811 / high >> performance option. >>>> >>>> While the complete original HP kit was not available, I salvagedthe >> 10->5 MHz divider/connection board from a 105Band re-designed the back PCB >> with the 2 x 15pole 3.96 pitch connectors and mechanics >>>> so that the design would be ableto fit into the 5065A chassis in a way >> that the10811 Coarse adjustment could be reached with a longadjustment tool >> directly. >>>> Picture(s) available upon request. >>>> >>>> I have the design files (Cadence Allegro) as well asGerber/Drill files >> for anyone that want to fabricate sucha back plate board. >>>> >>>> Please contact me off-list if you want thedesign files. >>>> Best Regards >>>> Ulf KylenfallSM6GXV >>>> >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >>>> To unsubscribe, go to and follow the instructions there. >>> >>> >>> >>> -- >>> /* Lin Ke-Fong >>> * anotherlin@gmail.com >>> * I always do what I say, especially if it's something stupid. >>> */ >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >> an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > <PXL_20220212_151505393.jpg>_______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.