It's Ebay item 351861979923 Dave M KA2WEU--- via time-nuts wrote: > I can not find the item on EBAY , Ulrich > > > In a message dated 10/3/2016 11:51:24 A.M. Eastern Daylight Time, > jn6wfo@gmail.com writes: > > According to my -hp- catalogs it was available only in rack-mount > form, not in a cabinet. That suggests it was being marketed to a > specific small group so it may indeed have been manufactured in > small quantities. > > Jeremy > > > On Monday, October 3, 2016, Magnus Danielson > <magnus@rubidium.dyndns.org> wrote: > >> Since you force-feed it 100 KC at the back, no crystal would be >> needed. >> >> Cheers, >> Magnus >> >> On 10/03/2016 04:57 PM, paul swed wrote: >> >>> Also notice the missing something on the far right that may have >>> been some xtal or something. >>> I went to look for a manual to see what it was. No luck though the >>> manual may be out there. >>> I would say its rare, but the price is going to most likely go up >>> because it is a bid. >>> Great winter project but not worth a lot of $ to me at least. Good >>> luck to whoever gets it. >>> Regards >>> Paul >>> WB8TSL >>> >>> On Mon, Oct 3, 2016 at 10:42 AM, Bob Camp <kb8tq@n1k.org> wrote: >>> >>> Hi >>>> >>>> Rare is indeed a relative term. I would certainly call it rare, >>>> but others >>>> might not. >>>> You likely would be the only person on your block who has one :) >>>> >>>> In the picture of the innards you can see a number of fine old >>>> wet slug tantalum >>>> capacitors. One even appears to have goo leaking out of it. I’d >>>> plan > on >>>> having a >>>> lot of fun tracking down this or that part to get it working >>>> reliably. >>>> >>>> On Oct 3, 2016, at 10:27 AM, Jeremy Nichols <jn6wfo@gmail.com> >>>> wrote: >>>>> >>>>> I saw that. Is it really rare or just hype by the luster? >>>>> >>>>> Jeremy >>>>> >>>>> On Monday, October 3, 2016, Bert Kehren via time-nuts < >>>>> >>>> time-nuts@febo.com> >>>> >>>>> wrote: >>>>> >>>>> There is a rare HP clock on ebay for the collectors among us. I >>>>> am to >>>>>> old. >>>>>> >>>>>> RARE HP H20 115BR FREQUENCY DIVIDER & DIGITAL CLOCK STANDARD > VINTAGE >>>>>> >>>>> TEST >>>> >>>>> >>>>>> Bert Kehren >>>>>> _______________________________________________ >>>>>> time-nuts mailing list -- time-nuts@febo.com <javascript:;> >>>>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >>>>>> mailman/listinfo/time-nuts >>>>>> and follow the instructions there. >>>>>> >>>>>> >>>>> >>>>> -- >>>>> Sent from Gmail Mobile >>>>> _______________________________________________ >>>>> 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/m >>> ailman/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/m >> ailman/listinfo/time-nuts >> and follow the instructions there. When the people fear the government, there is tyranny. When the government fears the people, there is liberty -- Thomas Jefferson Dave M

I have one of those, only in light gray. It works quite nicely, though it is obscenely loud! It has a divider network that takes 100KHz from a companion reference unit, and divides it down to 1KHz, that it uses to drive a stepper motor used as a synchronous motor. The motor drives the mechanical counter mechanism. Because the motor is being driven with a single phase 1KHz signal, you have to give its shaft a spin to start it. There is a little crank driven synchro generator that is used to insert a phase difference into the 100KHz reference signal that serves to shift the edge of the 1PPS output. It is built into a cast aluminum chassis, that is sealed with O-rings, and even has a humidity monitor to show the condition of the air in the unit. The biggest issues I can see with it are the strong 1KHz audio note, the condition of the ball bearings that support the motor shaft, the little herd of wet tantalum capacitors in its circuitry, and the internal nicad pack that keeps it live during short power failures.. The mechanical counter probably needs some cleaning and lubrication at this point. -Chuck Harris Dave M wrote: > It's Ebay item 351861979923 > > Dave M > > KA2WEU--- via time-nuts wrote: >> I can not find the item on EBAY , Ulrich >> >> >> In a message dated 10/3/2016 11:51:24 A.M. Eastern Daylight Time, >> jn6wfo@gmail.com writes: >> >> According to my -hp- catalogs it was available only in rack-mount >> form, not in a cabinet. That suggests it was being marketed to a >> specific small group so it may indeed have been manufactured in >> small quantities. >> >> Jeremy >

Hi: Let me second Chuck's comment on the noise. You can NOT have this inside any living space. I saw this based on running an HP 117 for some time in the garage but also have one of the 115BR units. http://www.prc68.com/I/Images/Rack2bb.jpg http://www.prc68.com/I/TF_rack.html PS there are internal momentary switches on the117 multipliers that need to be tweaked to start them so if it totally stops it takes some effort to get it going again. -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html The lesser of evils is still evil. -------- Original Message -------- > I have one of those, only in light gray. > > It works quite nicely, though it is obscenely loud! > It has a divider network that takes 100KHz from a > companion reference unit, and divides it down to 1KHz, > that it uses to drive a stepper motor used as a synchronous > motor. The motor drives the mechanical counter mechanism. > Because the motor is being driven with a single phase > 1KHz signal, you have to give its shaft a spin to start > it. > > There is a little crank driven synchro generator that > is used to insert a phase difference into the 100KHz > reference signal that serves to shift the edge of the > 1PPS output. > > It is built into a cast aluminum chassis, that is sealed > with O-rings, and even has a humidity monitor to show > the condition of the air in the unit. > > The biggest issues I can see with it are the strong > 1KHz audio note, the condition of the ball bearings > that support the motor shaft, the little herd of > wet tantalum capacitors in its circuitry, and the > internal nicad pack that keeps it live during short > power failures.. > > The mechanical counter probably needs some cleaning > and lubrication at this point. > > -Chuck Harris > > Dave M wrote: >> It's Ebay item 351861979923 >> >> Dave M >> >> KA2WEU--- via time-nuts wrote: >>> I can not find the item on EBAY , Ulrich >>> >>> >>> In a message dated 10/3/2016 11:51:24 A.M. Eastern Daylight Time, >>> jn6wfo@gmail.com writes: >>> >>> According to my -hp- catalogs it was available only in rack-mount >>> form, not in a cabinet. That suggests it was being marketed to a >>> specific small group so it may indeed have been manufactured in >>> small quantities. >>> >>> Jeremy > _______________________________________________ > 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. >