Re: [time-nuts] Odd request
Brooke, Well I would guess that all depends on what you fine under that cover! :) It appears to be a 4 wire system which could mean you may find a run motor and a correction coil. But I'm just guess'n. :) Send pictures! Jack -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: Thursday, January 25, 2007 9:00 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Odd request Hi Jack: OK, so now I've won the Edwards school clock eBay item number 110081232209 I choose it because of the second hand. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110081232209 But how how to connect it? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Jack Hudler wrote: >There are some clocks like the ones in schools that use a 1PPS, 1PPM or faster. > >On eBay >230081995247 nice >110082857347 neat!! >250076726064 >110081232209 >180076563718 > >This guy is selling a master simulator 200071362893 > >-Original Message- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >Of Mark Amos >Sent: Thursday, January 25, 2007 3:51 PM >To: time-nuts@febo.com >Subject: [time-nuts] Odd request > >Time-nuts > >I appreciate the comments regarding horological obsession. Mine started with a >desire for an accurate master >oscillator for my ham shack (built and use a couple Shera GPSDO's) and has >blossomed into a much broader interest >in time (Ex tempus, sapientia?) > >This has led me to a silly quest. I'd like to use a traditional clock face and >hands as an output device for a >1PPS signal from my GPSDO. > >I know this is a very broad question, but does anyone have advice on where I >might start hacking (or making) a >mechanical clock face to accomplish this? Is there a simple clock design that I >could start with to build my own? >Maybe replacing a pendulum or escapement with a solenoid? Any examples to work >from? > >Mark > > > > >___ >time-nuts mailing list >time-nuts@febo.com >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > >___ >time-nuts mailing list >time-nuts@febo.com >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
On Thu, Jan 25, 2007 at 08:37:27PM -0800, Normand Martel wrote: > Hi Tom... > > Not only Telechron were very popular electric clock > movements, they were BY FAR the very best mechanical > movements ever made. > > When young, i've opened A LOT of used > electro-mechanical clock movements, and most of them > showed evident traces of wear. Worn-out gear pinions, > dried-out and seized brass/steel bushings, dried-out > and cracked nylon pinions (Nylon tends to harden and > shrink with time and heat, so Nylon parts shall NEVER > be put on a traction stress when manufactured) were > frequent on old clock movements, but NEVER on > Telechrons, except very > rare cases of pinion wear on the output shaft (3.6 > RPM) > > Telechron movements were very unique. The motors were > two-pole shaded pole synchronous motors with an > external solenoid and a completly sealed rotor > stuck within the poles pieces. The self-starting > rotor, composed of three spring steel disks forced in > place on a smooth shaft and spinning at 3600 RPM (60 > Hz) was inside a sealed cylindrical aluminum gearbox > (older gearboxes were in a copper sealed box) > containing not only the rotor shaft, but also a 1000:1 > reduction geartrain. Pinions were made of stacked thin > steel pinion disks forced on the shaft to form single > solid pinions. The faster rotating gears plates were > made of some kind of red-orange colored fiber material > and the slower rotating (higher torque) plates, of > soft brass. The gear holding plates were made of thick > alunimum with a thinner aluminum subplate that > prevented the gears from sliding longitudinally, but > far more important, the thin space between the plates > and subplates had a capital role: Keeping a fine > capillary oil film between the plate and subplate, > that film kept the gear shafts permanently lubricated, > thus eliminating all trace of wear. Even the gears > themselves (the rotor was spinning at 3600 RPM and the > second gear, at 864 RPM) didn't show any trace of > wear, even under a magnifying glass. > > I even remember the gear ratios of a Telechron: > > Rotor: 12 toothed pinion (3600 RPM) > Second gear: 50 tooth fiber plate coupled to a 12 > tooth pinion R:r: 4.167:1 �> Third gear: 54 tooth fiber plate coupled to a 18 > tooth pinion R:r: 4.5:1 > Fourth gear: 60 tooth fiber plate coupled to a 12 > tooth pinion R:r: 3.333:1 > Fifth gear: 60 tooth brass plate coupled to a 12 > tooth pinion R:r: 4:1 > Output gear: 60 tooth brass plate coupled to an > external 10 tooth pinion R:r: 4:1 > > 4.16667*4.5*3.33*4*4=1000 > > Definitely a fine movement! I still use an ld > Telechron at my shop. > > 73 de Normand VE2UM > > --- "Tom Van Baak (mobile)" <[EMAIL PROTECTED]> > wrote: > > > > > See Mitchell's SWCC page at: > > http://www.telechron.com/ > > > > /tvb > > > > > > ___ > > time-nuts mailing list > > time-nuts@febo.com > > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > > > > > Need Mail bonding? > Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. > http://answers.yahoo.com/dir/?link=list&sid=396546091 > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -- Dave Emery N1PRE, [EMAIL PROTECTED] DIE Consulting, Weston, Mass 02493 "An empty zombie mind with a forlorn barely readable weatherbeaten �'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be no� � ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Hi Tom... Not only Telechron were very popular electric clock movements, they were BY FAR the very best mechanical movements ever made. When young, i've opened A LOT of used electro-mechanical clock movements, and most of them showed evident traces of wear. Worn-out gear pinions, dried-out and seized brass/steel bushings, dried-out and cracked nylon pinions (Nylon tends to harden and shrink with time and heat, so Nylon parts shall NEVER be put on a traction stress when manufactured) were frequent on old clock movements, but NEVER on Telechrons, except very rare cases of pinion wear on the output shaft (3.6 RPM) Telechron movements were very unique. The motors were two-pole shaded pole synchronous motors with an external solenoid and a completly sealed rotor stuck within the poles pieces. The self-starting rotor, composed of three spring steel disks forced in place on a smooth shaft and spinning at 3600 RPM (60 Hz) was inside a sealed cylindrical aluminum gearbox (older gearboxes were in a copper sealed box) containing not only the rotor shaft, but also a 1000:1 reduction geartrain. Pinions were made of stacked thin steel pinion disks forced on the shaft to form single solid pinions. The faster rotating gears plates were made of some kind of red-orange colored fiber material and the slower rotating (higher torque) plates, of soft brass. The gear holding plates were made of thick alunimum with a thinner aluminum subplate that prevented the gears from sliding longitudinally, but far more important, the thin space between the plates and subplates had a capital role: Keeping a fine capillary oil film between the plate and subplate, that film kept the gear shafts permanently lubricated, thus eliminating all trace of wear. Even the gears themselves (the rotor was spinning at 3600 RPM and the second gear, at 864 RPM) didn't show any trace of wear, even under a magnifying glass. I even remember the gear ratios of a Telechron: Rotor: 12 toothed pinion (3600 RPM) Second gear: 50 tooth fiber plate coupled to a 12 tooth pinion R:r: 4.167:1 Third gear: 54 tooth fiber plate coupled to a 18 tooth pinion R:r: 4.5:1 Fourth gear: 60 tooth fiber plate coupled to a 12 tooth pinion R:r: 3.333:1 Fifth gear: 60 tooth brass plate coupled to a 12 tooth pinion R:r: 4:1 Output gear: 60 tooth brass plate coupled to an external 10 tooth pinion R:r: 4:1 4.16667*4.5*3.33*4*4=1000 Definitely a fine movement! I still use an ld Telechron at my shop. 73 de Normand VE2UM --- "Tom Van Baak (mobile)" <[EMAIL PROTECTED]> wrote: > > See Mitchell's SWCC page at: > http://www.telechron.com/ > > /tvb > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. http://answers.yahoo.com/dir/?link=list&sid=396546091 ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
On Thu, 25 Jan 2007 16:50:46 -0500, "Mark Amos" <[EMAIL PROTECTED]> wrote: >This has led me to a silly quest. I'd like to use a traditional clock face >and hands as an output device for a >1PPS signal from my GPSDO. > >I know this is a very broad question, but does anyone have advice on where I >might start hacking (or making) a >mechanical clock face to accomplish this? Is there a simple clock design that >I could start with to build my own? >Maybe replacing a pendulum or escapement with a solenoid? Any examples to >work from? Finally something I can contribute. Any el-cheapo quartz clock movement should work with a little mod. I've disassembled several brands and they all appear to be the same on the inside. A chip-on-board does the logic and a 2 coil stepping motor drives the second hand. The minute and hour hands are driven through conventional geartrains. The stepper has two coils and the rotor turns 90 deg with each step. All you need is a little logic to take the one PPS and turn it into stepper commands. Anything from a PLA to a PIC should do. If you didn't want to mod the clock you could build a 32khz oscillator phase locked to the one PPS signal and feed this in place of the tuning fork crystal. Hard to say which would be simpler but probably modding the clock to drive the stepper directly. John --- John De Armond See my website for my current email address http://www.neon-john.com Cleveland, Occupied TN Don't let your schooling interfere with your education-Mark Twain ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Hi Jack: OK, so now I've won the Edwards school clock eBay item number 110081232209 I choose it because of the second hand. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110081232209 But how how to connect it? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Jack Hudler wrote: >There are some clocks like the ones in schools that use a 1PPS, 1PPM or faster. > >On eBay >230081995247 nice >110082857347 neat!! >250076726064 >110081232209 >180076563718 > >This guy is selling a master simulator 200071362893 > >-Original Message- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >Of Mark Amos >Sent: Thursday, January 25, 2007 3:51 PM >To: time-nuts@febo.com >Subject: [time-nuts] Odd request > >Time-nuts > >I appreciate the comments regarding horological obsession. Mine started with a >desire for an accurate master >oscillator for my ham shack (built and use a couple Shera GPSDO's) and has >blossomed into a much broader interest >in time (Ex tempus, sapientia?) > >This has led me to a silly quest. I'd like to use a traditional clock face and >hands as an output device for a >1PPS signal from my GPSDO. > >I know this is a very broad question, but does anyone have advice on where I >might start hacking (or making) a >mechanical clock face to accomplish this? Is there a simple clock design that I >could start with to build my own? >Maybe replacing a pendulum or escapement with a solenoid? Any examples to work >from? > >Mark > > > > >___ >time-nuts mailing list >time-nuts@febo.com >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > >___ >time-nuts mailing list >time-nuts@febo.com >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd Request
There was a "The Amateur Scientist" article in the September 1974 issue of Scientific American on "A venerable clock is made highly accurate by equipping it with quartz-crystal works" which shows how to drive a pendulum clock with a crystal oscillator. I have a PDF I can email (16MB) if you are interested. - Original Message - From: "Mark Amos" <[EMAIL PROTECTED]> To: Sent: Thursday, January 25, 2007 4:50 PM Subject: [time-nuts] Odd request > Time-nuts > > I appreciate the comments regarding horological obsession. Mine started > with a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera GPSDO's) and has > blossomed into a much broader interest > in time (Ex tempus, sapientia?) > > This has led me to a silly quest. I'd like to use a traditional clock > face and hands as an output device for a > 1PPS signal from my GPSDO. > > I know this is a very broad question, but does anyone have advice on where > I might start hacking (or making) a > mechanical clock face to accomplish this? Is there a simple clock design > that I could start with to build my own? > Maybe replacing a pendulum or escapement with a solenoid? Any examples to > work from? > > Mark > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > - Need a quick answer? Get one in minutes from people who know. Ask your question on Yahoo! Answers. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Thanks to Bruce, the app note is now at http://www.ko4bb.com/ham_radio/Manuals/1_App_Notes along with app note HP 57-1 Noise Figure Measurement and a Watkins Johnson app note on Mixers (scanned by myself) and others Didier KO4BB Dr Bruce Griffiths wrote: > I have just unearthed HP application notes: > > 301-1: "Low noise division of 10MHz oscillators" > > and > > 935: "Microwave power generation and amplification using impatt diodes" > > Anyone interested in scanned copies? > > Bruce > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
mark, look at a cheap kitchen clock that runs on a battery and uses a 1pps to move the second hand which moves gears for the rest. tom w0kgw - Original Message - From: "Mark Amos" <[EMAIL PROTECTED]> To: Sent: Thursday, January 25, 2007 3:50 PM Subject: [time-nuts] Odd request > Time-nuts > > I appreciate the comments regarding horological obsession. Mine started > with a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera GPSDO's) and has > blossomed into a much broader interest > in time (Ex tempus, sapientia?) > > This has led me to a silly quest. I'd like to use a traditional clock > face and hands as an output device for a > 1PPS signal from my GPSDO. > > I know this is a very broad question, but does anyone have advice on where > I might start hacking (or making) a > mechanical clock face to accomplish this? Is there a simple clock design > that I could start with to build my own? > Maybe replacing a pendulum or escapement with a solenoid? Any examples to > work from? > > Mark > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
> I know this is a very broad question, but does anyone have advice on > where I might start hacking (or making) a mechanical clock face to > accomplish this? Is there a simple clock design that I could start > with to build my own? Maybe replacing a pendulum or escapement with a > solenoid? Any examples to work from? There was an article in Scientific American Sep 74 describing a nice hack to synchronize a pendulum clock to a quartz crystal. They attached a magnet to the pendulum and then pulsed a coil at the right time. It was the typical Amateur Scientist level of detail. Some pack rat on this list (I think) sent me a scanned in copy. I can send it to anybody who wants it. >From my bookmark collection: http://www.bmumford.com/clocks/emindex.html You might get some good ideas. -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Oh, that would look so nice, next to some of my tube radios! - Original Message - From: "Dave Brown" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Thursday, January 25, 2007 4:27 PM Subject: Re: [time-nuts] Odd request > Yes- XYL, SWMBO, whatever!!! > But she does like my Telechron 8B01-like this one > http://uv201.com/Clock_Pages/Telechron/telechron_minitmaster.htm > which some 'twas say the original digital clock. The 50Hz motor in > mine needs replacing-considering a stepper motor driven from GPS-but > that's another story. > > DaveB, NZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Well well there's hope for her yet :) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Brown Sent: Thursday, January 25, 2007 5:28 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Odd request Yes- XYL, SWMBO, whatever!!! But she does like my Telechron 8B01-like this one http://uv201.com/Clock_Pages/Telechron/telechron_minitmaster.htm which some 'twas say the original digital clock. The 50Hz motor in mine needs replacing-considering a stepper motor driven from GPS-but that's another story. DaveB, NZ - Original Message - From: "Jack Hudler" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Friday, January 26, 2007 12:09 PM Subject: Re: [time-nuts] Odd request > It is elegant! Was that the XYL's opinion? > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf > Of Dave Brown > Sent: Thursday, January 25, 2007 5:07 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Odd request > > - Original Message - > From: "jmfranke" <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > > Sent: Friday, January 26, 2007 10:57 AM > Subject: Re: [time-nuts] Odd request > > >>I am going the same route and have discovered slave clocks which are >> solenoid driven clocks. The clocks were once very popular in >> schools and >> factories. The hands typically step in one minute steps. >> >> See: http://www.clockhistory.com/setclocks/index.html >> >> I plan to use one of the clock movements to display minutes and >> hours and a >> two digit LED digital display for the seconds. I will divide the >> 1PPS >> output from a Z3801A by 60 to get 1PPM. >> >> John WA4WDL > > > Some used a 30 second pulse as well - might pay to check the > particular slave you have before you make the divider!I have a > Gents master clock here- I DID want to put it in the lounge but it > was > considerd too 'industrial' so its been relegated to 'outer > darkness'! > Personally I think it's rather elegant, but.. > Picture here- > http://homepages.ihug.co.nz/~tractorb/gents%20master.gif > These were made in two pendulum lengths-this is the longer case (3 > foot pendulum) model. > DaveB, NZ > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.432 / Virus Database: 268.17.10/651 - Release Date: > 24/01/2007 18:48 > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Yes- XYL, SWMBO, whatever!!! But she does like my Telechron 8B01-like this one http://uv201.com/Clock_Pages/Telechron/telechron_minitmaster.htm which some 'twas say the original digital clock. The 50Hz motor in mine needs replacing-considering a stepper motor driven from GPS-but that's another story. DaveB, NZ - Original Message - From: "Jack Hudler" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Friday, January 26, 2007 12:09 PM Subject: Re: [time-nuts] Odd request > It is elegant! Was that the XYL's opinion? > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf > Of Dave Brown > Sent: Thursday, January 25, 2007 5:07 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Odd request > > - Original Message - > From: "jmfranke" <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > > Sent: Friday, January 26, 2007 10:57 AM > Subject: Re: [time-nuts] Odd request > > >>I am going the same route and have discovered slave clocks which are >> solenoid driven clocks. The clocks were once very popular in >> schools and >> factories. The hands typically step in one minute steps. >> >> See: http://www.clockhistory.com/setclocks/index.html >> >> I plan to use one of the clock movements to display minutes and >> hours and a >> two digit LED digital display for the seconds. I will divide the >> 1PPS >> output from a Z3801A by 60 to get 1PPM. >> >> John WA4WDL > > > Some used a 30 second pulse as well - might pay to check the > particular slave you have before you make the divider!I have a > Gents master clock here- I DID want to put it in the lounge but it > was > considerd too 'industrial' so its been relegated to 'outer > darkness'! > Personally I think it's rather elegant, but.. > Picture here- > http://homepages.ihug.co.nz/~tractorb/gents%20master.gif > These were made in two pendulum lengths-this is the longer case (3 > foot pendulum) model. > DaveB, NZ > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.432 / Virus Database: 268.17.10/651 - Release Date: > 24/01/2007 18:48 > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Yes, I have heard of 30 movements, but the ones I am working with have a sixty step racket and are designed for onece per minute stepping. That is an awesome clock! John - Original Message - From: "Dave Brown" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Thursday, January 25, 2007 6:07 PM Subject: Re: [time-nuts] Odd request > - Original Message - > From: "jmfranke" <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > > Sent: Friday, January 26, 2007 10:57 AM > Subject: Re: [time-nuts] Odd request > > >>I am going the same route and have discovered slave clocks which are >> solenoid driven clocks. The clocks were once very popular in >> schools and >> factories. The hands typically step in one minute steps. >> >> See: http://www.clockhistory.com/setclocks/index.html >> >> I plan to use one of the clock movements to display minutes and >> hours and a >> two digit LED digital display for the seconds. I will divide the >> 1PPS >> output from a Z3801A by 60 to get 1PPM. >> >> John WA4WDL > > > Some used a 30 second pulse as well - might pay to check the > particular slave you have before you make the divider!I have a > Gents master clock here- I DID want to put it in the lounge but it was > considerd too 'industrial' so its been relegated to 'outer darkness'! > Personally I think it's rather elegant, but.. > Picture here- > http://homepages.ihug.co.nz/~tractorb/gents%20master.gif > These were made in two pendulum lengths-this is the longer case (3 > foot pendulum) model. > DaveB, NZ > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
It is elegant! Was that the XYL's opinion? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Brown Sent: Thursday, January 25, 2007 5:07 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Odd request - Original Message - From: "jmfranke" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Friday, January 26, 2007 10:57 AM Subject: Re: [time-nuts] Odd request >I am going the same route and have discovered slave clocks which are > solenoid driven clocks. The clocks were once very popular in > schools and > factories. The hands typically step in one minute steps. > > See: http://www.clockhistory.com/setclocks/index.html > > I plan to use one of the clock movements to display minutes and > hours and a > two digit LED digital display for the seconds. I will divide the > 1PPS > output from a Z3801A by 60 to get 1PPM. > > John WA4WDL Some used a 30 second pulse as well - might pay to check the particular slave you have before you make the divider!I have a Gents master clock here- I DID want to put it in the lounge but it was considerd too 'industrial' so its been relegated to 'outer darkness'! Personally I think it's rather elegant, but.. Picture here- http://homepages.ihug.co.nz/~tractorb/gents%20master.gif These were made in two pendulum lengths-this is the longer case (3 foot pendulum) model. DaveB, NZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
- Original Message - From: "jmfranke" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Friday, January 26, 2007 10:57 AM Subject: Re: [time-nuts] Odd request >I am going the same route and have discovered slave clocks which are > solenoid driven clocks. The clocks were once very popular in > schools and > factories. The hands typically step in one minute steps. > > See: http://www.clockhistory.com/setclocks/index.html > > I plan to use one of the clock movements to display minutes and > hours and a > two digit LED digital display for the seconds. I will divide the > 1PPS > output from a Z3801A by 60 to get 1PPM. > > John WA4WDL Some used a 30 second pulse as well - might pay to check the particular slave you have before you make the divider!I have a Gents master clock here- I DID want to put it in the lounge but it was considerd too 'industrial' so its been relegated to 'outer darkness'! Personally I think it's rather elegant, but.. Picture here- http://homepages.ihug.co.nz/~tractorb/gents%20master.gif These were made in two pendulum lengths-this is the longer case (3 foot pendulum) model. DaveB, NZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
On 1/25/2007 12:50:46 PM, Mark Amos ([EMAIL PROTECTED]) wrote: > Time-nuts > > I appreciate the comments regarding horological obsession. Mine started > with a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera > GPSDO's) and has blossomed into a much broader interest > in time (Ex tempus, sapientia?) > > This has led me to a silly quest. I'd > like to use a traditional clock face and hands as an output device for a > 1PPS signal from my GPSDO. > > I know this is a very broad question, but does anyone have advice on where > I might start hacking (or making) a > mechanical clock face to accomplish this? Is there a simple clock design > that I could start with to build my own? > Maybe replacing a pendulum or escapement with a solenoid? Any examples to > work from? > > Mark > 1. Obtain a cheap quartz clock movement. Cut the at least one trace to the drive coil. 2. Place a 50-100 microfarad capacitor (electrolytic is ok) in series with the clock drive coil. You may have to fuss with the value to get it right. 3. Drive the clock coil-capacitor with the output of pin 4 of U8 of the Shera circuit. A typical quartz clock movement requires a 10-20 msec long 1-1.5 V pulse on the coil to step the clock one second. But each second is opposite polarity. Pin 4 of U8 is the heartbeat pulse. The capacitor takes the derivative of the heartbeat giving the necessary alternateing sign pulse train. Note that positive pulses will correspond to odd(even) seconds and negative pulses to even(odd) seconds. If the clock is odd number of seconds in error, then reverse the polarity to the clock. I have had a Shera circuit running three quartz wall clocks for months at a time. They only get out of time if I mess with them. This is a brute force, cheap (elegant) physicists solution, not a fancy electrical engineers solution. Bill Beam, NL7F Bill Beam NL7F -- No virus found in this outgoing message. Checked by AVG. Version: 7.5.441 / Virus Database: 268.17.4/643 - Release Date: 1/21/2007 5:12 PM ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Mark Amos wrote: > Time-nuts > > I appreciate the comments regarding horological obsession. Mine started with > a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera GPSDO's) and has > blossomed into a much broader interest > in time (Ex tempus, sapientia?) > > This has led me to a silly quest. I'd like to use a traditional clock face > and hands as an output device for a > 1PPS signal from my GPSDO. > > I know this is a very broad question, but does anyone have advice on where I > might start hacking (or making) a > mechanical clock face to accomplish this? Is there a simple clock design that > I could start with to build my own? > Maybe replacing a pendulum or escapement with a solenoid? Any examples to > work from? > > Mark > Battery powered clocks are available in hobby shops especially those that cater to woodworkers. They have a wide selection of hands for every application. You would have to hack the electric part but I think that is do-able. Bill K7NOM ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
There are some clocks like the ones in schools that use a 1PPS, 1PPM or faster. On eBay 230081995247 nice 110082857347 neat!! 250076726064 110081232209 180076563718 This guy is selling a master simulator 200071362893 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Amos Sent: Thursday, January 25, 2007 3:51 PM To: time-nuts@febo.com Subject: [time-nuts] Odd request Time-nuts I appreciate the comments regarding horological obsession. Mine started with a desire for an accurate master oscillator for my ham shack (built and use a couple Shera GPSDO's) and has blossomed into a much broader interest in time (Ex tempus, sapientia?) This has led me to a silly quest. I'd like to use a traditional clock face and hands as an output device for a 1PPS signal from my GPSDO. I know this is a very broad question, but does anyone have advice on where I might start hacking (or making) a mechanical clock face to accomplish this? Is there a simple clock design that I could start with to build my own? Maybe replacing a pendulum or escapement with a solenoid? Any examples to work from? Mark ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
"Mark Amos" <[EMAIL PROTECTED]> wrote: > I appreciate the comments regarding horological obsession. Mine started with > a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera GPSDO's) and has > blossomed into a much broader interest > in time (Ex tempus, sapientia?) Mine is obviously inherited. Mixed in among all the pictures of me as a baby are pictures of hundreds of pocketwatches (mostly railroad watches) that my dad collected :-). > This has led me to a silly quest. I'd like to use a traditional clock face > and hands as an output device for a > 1PPS signal from my GPSDO. Quartz clock movements with a second hand do exactly what you want. Deliver 1PPS and the second hand goes forward a tick a second. Multiply up to 60Hz and drive a traditional 60Hz AC clock (TVB or someone else illustrates this with test equipment supplies driven from atomic clocks, but this is, let's just say, overkill, but what isn't? :-) ) There are Bulova and other brands of instrumentation clocks that are driven at more than 1PPS for smoother second hand movement. Some of this shows up in the surplus stream. Most used Tuning forks for the original frequency standard. There are various synchronized clock movements out there that show up on the surplus market but they usually have once-per-hour and once-per-day sync pulses, not once-per-second. Tim. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Tom Van Baak (mobile) wrote: > > But one easy way to do it today is start with a $5 standard > quartz clock display. 1) Either run a precise synthesized > 32 kHz signal into it (replacing the xtal), or drive the little > bipolar stepper yourself. > > A 50 millisecond +1.5 VDC pulse is all you need; next > second give it a -1.5 VDC pulse, etc. This is a few lines > of code for a microcontroller. I've got pictures of this > somewhere on my web site, I think. > Tom, With all due respect to your love of software, a microcontroller is a bit of overkill for this application. Use a 74HC74 D flip-flop connected as a divide-by-two toggle register: connect Q-not to the D input and feed the 1PPS into the C input; connect S and R to +5V. The drive pulse to the coil is generated very simply with a capacitor (~0.1 uf?) in series with the clock solenoid. This will produce a positive pulse when the flip-flop flips and a negative pulse when it flops. You don't need to worry about the 1.5V coil voltage rating - the capacitor will absorb the blow. I'd start out with a smaller capacitor (.001uf maybe) and increase it until it pulses reliably, then select perhaps twice that capacitance for reliability. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
Hi Mark: There may be some other approaches. Start from an electric clock that's battery powered and replace all the driving electronics and just drive the coil directly with the proper pulse rate. Start from an electric clock and replace just the crystal with a 32768 kHz signal. In the above cases I think you can find clocks with second hands. I've been thinking that it should be possible us use synchro motors (3 phase drive) to allow smooth movement of the hands and also to have continuous 360 degree rotation unlike model RC servo motors that don't have 360 degree rotation. I'm still working on packaging my Precision Clock, see: http://www.pacificsites.com/~brooke/PRC68COM.shtml#PC3 Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Mark Amos wrote: >Time-nuts > >I appreciate the comments regarding horological obsession. Mine started with >a desire for an accurate master >oscillator for my ham shack (built and use a couple Shera GPSDO's) and has >blossomed into a much broader interest >in time (Ex tempus, sapientia?) > >This has led me to a silly quest. I'd like to use a traditional clock face >and hands as an output device for a >1PPS signal from my GPSDO. > >I know this is a very broad question, but does anyone have advice on where I >might start hacking (or making) a >mechanical clock face to accomplish this? Is there a simple clock design that >I could start with to build my own? >Maybe replacing a pendulum or escapement with a solenoid? Any examples to >work from? > >Mark > > > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
> Time-nuts > > I appreciate the comments regarding horological obsession. Mine started with > a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera GPSDO's) and has > blossomed into a much broader interest > in time (Ex tempus, sapientia?) > > This has led me to a silly quest. I'd like to use a traditional clock face > and hands as an output device for a > 1PPS signal from my GPSDO. > > I know this is a very broad question, but does anyone have advice on where I > might start hacking (or making) a > mechanical clock face to accomplish this? Is there a simple clock design that > I could start with to build my own? > Maybe replacing a pendulum or escapement with a solenoid? Any examples to > work from? > > Mark This is one reason the older model HP 5065A and 5061A with Patek analog clocks are so desirable; they pre-date LED, LCD, or VFD clock displays. But one easy way to do it today is start with a $5 standard quartz clock display. 1) Either run a precise synthesized 32 kHz signal into it (replacing the xtal), or drive the little bipolar stepper yourself. A 50 millisecond +1.5 VDC pulse is all you need; next second give it a -1.5 VDC pulse, etc. This is a few lines of code for a microcontroller. I've got pictures of this somewhere on my web site, I think. See also Bryan's cool stuff at: http://www.bmumford.com/clocks/emindex.html Some of us have driven traditional pendulum clocks with GPS or atomic 1PPS. Another cute one is to take an old Western Union, US Naval Observatory, SWCC (Self-winding Clock Company) clocks and sync them using a GPS-divided 1PPH (one pulse per hour) pulse. See Mitchell's SWCC page at: http://www.telechron.com/ Also, here's what "USNO time" meant in the 1930's... http://www.leapsecond.com/history/usno.htm /tvb ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Odd request
I am going the same route and have discovered slave clocks which are solenoid driven clocks. The clocks were once very popular in schools and factories. The hands typically step in one minute steps. See: http://www.clockhistory.com/setclocks/index.html I plan to use one of the clock movements to display minutes and hours and a two digit LED digital display for the seconds. I will divide the 1PPS output from a Z3801A by 60 to get 1PPM. John WA4WDL - Original Message - From: "Mark Amos" <[EMAIL PROTECTED]> To: Sent: Thursday, January 25, 2007 4:50 PM Subject: [time-nuts] Odd request > Time-nuts > > I appreciate the comments regarding horological obsession. Mine started > with a desire for an accurate master > oscillator for my ham shack (built and use a couple Shera GPSDO's) and has > blossomed into a much broader interest > in time (Ex tempus, sapientia?) > > This has led me to a silly quest. I'd like to use a traditional clock > face and hands as an output device for a > 1PPS signal from my GPSDO. > > I know this is a very broad question, but does anyone have advice on where > I might start hacking (or making) a > mechanical clock face to accomplish this? Is there a simple clock design > that I could start with to build my own? > Maybe replacing a pendulum or escapement with a solenoid? Any examples to > work from? > > Mark > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Odd request
Time-nuts I appreciate the comments regarding horological obsession. Mine started with a desire for an accurate master oscillator for my ham shack (built and use a couple Shera GPSDO's) and has blossomed into a much broader interest in time (Ex tempus, sapientia?) This has led me to a silly quest. I'd like to use a traditional clock face and hands as an output device for a 1PPS signal from my GPSDO. I know this is a very broad question, but does anyone have advice on where I might start hacking (or making) a mechanical clock face to accomplish this? Is there a simple clock design that I could start with to build my own? Maybe replacing a pendulum or escapement with a solenoid? Any examples to work from? Mark ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for informationon693-ASYNCRO-CLOCK)
I have the manual for the 1123-A,-AD and a working 1123-A. I can loan the manual, it is too large to scan. John - Original Message - From: "Dave Brown" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Thursday, January 25, 2007 3:06 PM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for informationon693-ASYNCRO-CLOCK) > > - Original Message - > From: "jmfranke" <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > > Sent: Friday, January 26, 2007 8:29 AM > Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information > on693-ASYNCRO-CLOCK) > > >>I have a 693-B which has a large dial, the internal 1kHz amplifier, >>and the >> power supply. I also have a 1103-A which requires an external power >> supply. >> They are slowly moving up my to do list. The only manuals I have >> are for >> the 1103-A. I would be interested in a manual for the 693-B. >> >> John > > And I'm still looking for a manual for the GR 1123 synchronometer. > DaveB, NZ > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK)
I did find some information on the 693-A in a partial installation manual for a C-21-H Standard Frequency Assembly. I can scan the one page that at least shows the rack wiring harness if that would be of help. Or I could loan you the partial manual so you could tell more about the high volyage, etc. John - Original Message - From: "Stan Searing" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Thursday, January 25, 2007 2:00 PM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK) > While we're on the old GR subject... > I have a General Radio 693-A "syncro-clock and amplifiers" that contains > a GR model 611 syncro-clock module. I think the oscillator and power > supply > are separate (and I don't have them). Does anyone have any information on > the 693-A? > (Copies of a manual would be great!) > > I'd like to get it running within a decade, and given the number of > projects I have going at once, I should start soon. > > Don't know if this helps, but there is a decal on that back that says: > > THIS INSTRUMENT IS LICENSED UNDER > PATENTS OF THE AMERICAN TELEPHONE > AND TELEGRAPH COMPANY SOLEY FOR > UTILIZATION IN RESEARCH, INVESTIGA- > TION, MEASUREMENT, TESTING, INTRUC- > TION, AND DEVELOPMENT WORK IN PURE > AND APPLIED SCIENCE. > > > Stan > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK)
I did find some information on the 693-A in a partial installation manual for a C-21-H Standard Frequency Assembly. I can scan the one page that at least shows the rack wiring harness if that would be of help. Or I could loan you the partial manual so you could tell more about the high volyage, etc. Your address bounces. John - Original Message - From: "Stan Searing" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Thursday, January 25, 2007 2:00 PM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK) > While we're on the old GR subject... > I have a General Radio 693-A "syncro-clock and amplifiers" that contains > a GR model 611 syncro-clock module. I think the oscillator and power > supply > are separate (and I don't have them). Does anyone have any information on > the 693-A? > (Copies of a manual would be great!) > > I'd like to get it running within a decade, and given the number of > projects I have going at once, I should start soon. > > Don't know if this helps, but there is a decal on that back that says: > > THIS INSTRUMENT IS LICENSED UNDER > PATENTS OF THE AMERICAN TELEPHONE > AND TELEGRAPH COMPANY SOLEY FOR > UTILIZATION IN RESEARCH, INVESTIGA- > TION, MEASUREMENT, TESTING, INTRUC- > TION, AND DEVELOPMENT WORK IN PURE > AND APPLIED SCIENCE. > > > Stan > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK)
I did find some information on the 693-A in a partial installation manual for a C-21-H Standard Frequency Assembly. I can scan the one page that at least shows the rack wiring harness if that would be of help. Or I could loan you the partial manual so you could tell more about the high volyage, etc. How come your address does not work? John - Original Message - From: "Stan Searing" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Thursday, January 25, 2007 2:00 PM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK) > While we're on the old GR subject... > I have a General Radio 693-A "syncro-clock and amplifiers" that contains > a GR model 611 syncro-clock module. I think the oscillator and power > supply > are separate (and I don't have them). Does anyone have any information on > the 693-A? > (Copies of a manual would be great!) > > I'd like to get it running within a decade, and given the number of > projects I have going at once, I should start soon. > > Don't know if this helps, but there is a decal on that back that says: > > THIS INSTRUMENT IS LICENSED UNDER > PATENTS OF THE AMERICAN TELEPHONE > AND TELEGRAPH COMPANY SOLEY FOR > UTILIZATION IN RESEARCH, INVESTIGA- > TION, MEASUREMENT, TESTING, INTRUC- > TION, AND DEVELOPMENT WORK IN PURE > AND APPLIED SCIENCE. > > > Stan > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK)
I did find some information on the 693-A in a partial installation manual for a C-21-H Standard Frequency Assembly. I can scan the one page that at least shows the rack wiring harness if that would be of help. Or I could loan you the partial manual so you could tell more about the high volyage, oscillator, etc. John - Original Message - From: "Stan Searing" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Thursday, January 25, 2007 2:00 PM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK) > While we're on the old GR subject... > I have a General Radio 693-A "syncro-clock and amplifiers" that contains > a GR model 611 syncro-clock module. I think the oscillator and power > supply > are separate (and I don't have them). Does anyone have any information on > the 693-A? > (Copies of a manual would be great!) > > I'd like to get it running within a decade, and given the number of > projects I have going at once, I should start soon. > > Don't know if this helps, but there is a decal on that back that says: > > THIS INSTRUMENT IS LICENSED UNDER > PATENTS OF THE AMERICAN TELEPHONE > AND TELEGRAPH COMPANY SOLEY FOR > UTILIZATION IN RESEARCH, INVESTIGA- > TION, MEASUREMENT, TESTING, INTRUC- > TION, AND DEVELOPMENT WORK IN PURE > AND APPLIED SCIENCE. > > > Stan > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Dr Bruce Griffiths wrote: > I have just unearthed HP application notes: > > 301-1: "Low noise division of 10MHz oscillators" > > and > > 935: "Microwave power generation and amplification using impatt diodes" > > Anyone interested in scanned copies? > Yes please! Be well -- Bruce -- Bruce Rahn Wisdom has two parts: 1. having a lot to say; and 2. not saying it! ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] The Shadow Knows
At 03:03 PM 1/25/2007, Hal Murray wrote: >Best line: > >Toward the end of 1986, Atwood curtailed the museum's collecting and >publishing activities. "Seth Atwood is the only person I know who was >infected by the horological virus and later recovered," Andrewes says. "For >most collectors, death is the only cure." Oh how true! I can't afford to be a collector, but even an interest in time rapidly becomes and obsession and then you are on the slippery p[ath to addiction. I have never heard of time-nuts anonymous, and I hope I never do. John ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-ASYNCRO-CLOCK)
- Original Message - From: "jmfranke" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Friday, January 26, 2007 8:29 AM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-ASYNCRO-CLOCK) >I have a 693-B which has a large dial, the internal 1kHz amplifier, >and the > power supply. I also have a 1103-A which requires an external power > supply. > They are slowly moving up my to do list. The only manuals I have > are for > the 1103-A. I would be interested in a manual for the 693-B. > > John And I'm still looking for a manual for the GR 1123 synchronometer. DaveB, NZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] The Shadow Knows
> http://www.smithsonianmagazine.com/issues/2007/january/sundial.php?page=1 Neat! Thanks. Best line: Toward the end of 1986, Atwood curtailed the museum's collecting and publishing activities. "Seth Atwood is the only person I know who was infected by the horological virus and later recovered," Andrewes says. "For most collectors, death is the only cure." -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK)
I have a 693-B which has a large dial, the internal 1kHz amplifier, and the power supply. I also have a 1103-A which requires an external power supply. They are slowly moving up my to do list. The only manuals I have are for the 1103-A. I would be interested in a manual for the 693-B. John - Original Message - From: "Stan Searing" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Thursday, January 25, 2007 2:00 PM Subject: Re: [time-nuts] Nifty old GR OCXO? (looking for information on693-A SYNCRO-CLOCK) > While we're on the old GR subject... > I have a General Radio 693-A "syncro-clock and amplifiers" that contains > a GR model 611 syncro-clock module. I think the oscillator and power > supply > are separate (and I don't have them). Does anyone have any information on > the 693-A? > (Copies of a manual would be great!) > > I'd like to get it running within a decade, and given the number of > projects I have going at once, I should start soon. > > Don't know if this helps, but there is a decal on that back that says: > > THIS INSTRUMENT IS LICENSED UNDER > PATENTS OF THE AMERICAN TELEPHONE > AND TELEGRAPH COMPANY SOLEY FOR > UTILIZATION IN RESEARCH, INVESTIGA- > TION, MEASUREMENT, TESTING, INTRUC- > TION, AND DEVELOPMENT WORK IN PURE > AND APPLIED SCIENCE. > > > Stan > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] The Shadow Knows
http://www.smithsonianmagazine.com/issues/2007/january/sundial.php?page=1 ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO? (looking for information on 693-A SYNCRO-CLOCK)
While we're on the old GR subject... I have a General Radio 693-A "syncro-clock and amplifiers" that contains a GR model 611 syncro-clock module. I think the oscillator and power supply are separate (and I don't have them). Does anyone have any information on the 693-A? (Copies of a manual would be great!) I'd like to get it running within a decade, and given the number of projects I have going at once, I should start soon. Don't know if this helps, but there is a decal on that back that says: THIS INSTRUMENT IS LICENSED UNDER PATENTS OF THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY SOLEY FOR UTILIZATION IN RESEARCH, INVESTIGA- TION, MEASUREMENT, TESTING, INTRUC- TION, AND DEVELOPMENT WORK IN PURE AND APPLIED SCIENCE. Stan ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Where to get handles and feet for HP 5334B
Hal Murray wrote: > Is there any obvious place to get them? > > I'm looking for the hand-friendly handles, not the rack mount ears. > > The handles are option 907, part number 5061-9688. I didn't have any luck > via eBay or google. > > > How do I get the handles off? Or rather, how do I get the piece of plastic > covering the screws off? I assume it snaps off, but which way to I poke/pry > it to get it off without breaking something? > > > I think I have a few "feet" for the HP instruments. Don't know what the HP 5334B needs though. I think there were different styles of feet for old HP equipment. Bill K7NOM ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Bruce, If you can, please upload them to ftp.ko4bb.com using: Login: manuals Password: manuals Then I will move them with the other manuals and app notes at http://wwwmko4bb.com/ham_radio/Manuals Thanks in advance Didier KO4BB Sent via BlackBerry from Cingular Wireless -Original Message- From: Dr Bruce Griffiths <[EMAIL PROTECTED]> Date: Thu, 25 Jan 2007 22:05:58 To:Discussion of precise time and frequency measurement Subject: Re: [time-nuts] old HP application notes I have just unearthed HP application notes: 301-1: "Low noise division of 10MHz oscillators" and 935: "Microwave power generation and amplification using impatt diodes" Anyone interested in scanned copies? Bruce ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
From: John Ackermann N8UR <[EMAIL PROTECTED]> Subject: Re: [time-nuts] old HP application notes Date: Thu, 25 Jan 2007 08:11:29 -0500 Message-ID: <[EMAIL PROTECTED]> Bruce, If you send it to me I'll happilly toss it up on my web! Especially 301-1 is would be nice to have. PS. [EMAIL PROTECTED] is preferred for emailing me large files. As soon as I have them, I'll post here with links to them. Did you all see the link for the HP GPS Amp manual? Cheers, Magnus > Yes! > > John > > > Dr Bruce Griffiths wrote: > > I have just unearthed HP application notes: > > > > 301-1: "Low noise division of 10MHz oscillators" > > > > and > > > > 935: "Microwave power generation and amplification using impatt diodes" > > > > Anyone interested in scanned copies? > > > > Bruce > > > > ___ > > time-nuts mailing list > > time-nuts@febo.com > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Where to get handles and feet for HP 5334B
Hal Murray wrote: > Is there any obvious place to get them? > > I'm looking for the hand-friendly handles, not the rack mount ears. > > The handles are option 907, part number 5061-9688. I didn't have any luck > via eBay or google. > > > How do I get the handles off? Or rather, how do I get the piece of plastic > covering the screws off? I assume it snaps off, but which way to I poke/pry > it to get it off without breaking something? > > Hal, I'm pretty sure I have a pair. Drop me a line off-list. John ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Yes! John Dr Bruce Griffiths wrote: > I have just unearthed HP application notes: > > 301-1: "Low noise division of 10MHz oscillators" > > and > > 935: "Microwave power generation and amplification using impatt diodes" > > Anyone interested in scanned copies? > > Bruce > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO?
Tom Van Baak (mobile) wrote: > For other old GR oscillator stuff see: > http://www.leapsecond.com/museum/gr1103a/ > http://www.leapsecond.com/museum/gr1190a/ > http://www.leapsecond.com/museum/gr676b-50kc/ > http://www.leapsecond.com/pages/old-genrad/ Tom, if you have a working Genrad oscillator, you should run some performance tests on it. It would be interesting to see how that technology looks today... John ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Where to get handles and feet for HP 5334B
Is there any obvious place to get them? I'm looking for the hand-friendly handles, not the rack mount ears. The handles are option 907, part number 5061-9688. I didn't have any luck via eBay or google. How do I get the handles off? Or rather, how do I get the piece of plastic covering the screws off? I assume it snaps off, but which way to I poke/pry it to get it off without breaking something? -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Please I am also interested in 301-1: "Low noise division of 10MHz oscillators" Thanks! JOSE -- 73 EB5AGV / EC5AAU - JOSE V. GAVILA La Canyada - Valencia (SPAIN) - Loc: IM99SM Vintage Radio: http://jvgavila.com Vintage Test Equipment: http://jvgavila.com/testeq.htm European Boatanchors List: http://groups.yahoo.com/group/euro_ba_swap ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Yes, also for the 301-1! Ulrich Bangert [EMAIL PROTECTED] > -Ursprüngliche Nachricht- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Im Auftrag von Dave Brown > Gesendet: Donnerstag, 25. Januar 2007 10:19 > An: Discussion of precise time and frequency measurement > Betreff: Re: [time-nuts] old HP application notes > > > Ditto for 301-1 > DaveB > > - Original Message - > From: "Paramithiotti, Luciano Paolo S" <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > > Sent: Thursday, January 25, 2007 10:12 PM > Subject: Re: [time-nuts] old HP application notes > > > > Yes Bruce > > I am interested in: > > 301-1: "Low noise division of 10MHz oscillators" > > > > Thanks,Luciano > > Luciano P. S. Paramithiotti > > > > > > > > -Original Message- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > On > > Behalf Of Dr Bruce Griffiths > > Sent: Thursday, January 25, 2007 10:06 AM > > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] old HP application notes > > > > > > I have just unearthed HP application notes: > > > > 301-1: "Low noise division of 10MHz oscillators" > > > > and > > > > 935: "Microwave power generation and amplification using impatt > > diodes" > > > > Anyone interested in scanned copies? > > > > Bruce > > > > ___ > > time-nuts mailing list > > time-nuts@febo.com > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > ___ > > time-nuts mailing list > > time-nuts@febo.com > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > > > > -- > > No virus found in this incoming message. > > Checked by AVG Free Edition. > > Version: 7.5.432 / Virus Database: 268.17.8/649 - Release Date: > > 23/01/2007 20:40 > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Ditto for 301-1 DaveB - Original Message - From: "Paramithiotti, Luciano Paolo S" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Thursday, January 25, 2007 10:12 PM Subject: Re: [time-nuts] old HP application notes > Yes Bruce > I am interested in: > 301-1: "Low noise division of 10MHz oscillators" > > Thanks,Luciano > Luciano P. S. Paramithiotti > > > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On > Behalf Of Dr Bruce Griffiths > Sent: Thursday, January 25, 2007 10:06 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] old HP application notes > > > I have just unearthed HP application notes: > > 301-1: "Low noise division of 10MHz oscillators" > > and > > 935: "Microwave power generation and amplification using impatt > diodes" > > Anyone interested in scanned copies? > > Bruce > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.432 / Virus Database: 268.17.8/649 - Release Date: > 23/01/2007 20:40 > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
Yes Bruce I am interested in: 301-1: "Low noise division of 10MHz oscillators" Thanks,Luciano Luciano P. S. Paramithiotti -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dr Bruce Griffiths Sent: Thursday, January 25, 2007 10:06 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] old HP application notes I have just unearthed HP application notes: 301-1: "Low noise division of 10MHz oscillators" and 935: "Microwave power generation and amplification using impatt diodes" Anyone interested in scanned copies? Bruce ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO?
A GR system - as per the tvb web page - in operation at Makara (an MF/HF receiving/monitoring site) near Wellington NZ-this came out of service in 1955 and was replaced with the completely home-grown frequency measuring system in the second photograph. http://homepages.ihug.co.nz/~tractorb/GR%20freq%20measuring%20eqpt/ DaveB, NZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] old HP application notes
I have just unearthed HP application notes: 301-1: "Low noise division of 10MHz oscillators" and 935: "Microwave power generation and amplification using impatt diodes" Anyone interested in scanned copies? Bruce ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO?
> http://www.leapsecond.com/museum/gr1190a/ That's a nifty piece. What's the ADEV at tau=1s ? -ch ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] John Vigg Oscillators?
Sorry about that - could have sworn it was Vigg Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rick Karlquist Sent: 24 January 2007 22:58 To: Discussion of precise time and frequency measurement Cc: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] John Vigg Oscillators? It would help if you spelled his name Vig. It should be posted on the IEEE UFFC site under tutorials. Rick Karlquist N6RK Rob Kimberley wrote: > Can anyone point me to a link where I might get a copy of John Vigg's > excellent application note on oscillators? I had a copy some years > ago, but cannot find it now. > > Thanks in advance for your help. > > Rob Kimberley > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Nifty old GR OCXO?
Since the topic has been raised- herewith a few pix of an equally old (well, nearly!) OCXO using mercury-in-glass high and low set point thermometers for temperature control. http://homepages.ihug.co.nz/~tractorb/oven/ This came out of an early openwire carrier system-of UK origin-probably immediately post WW2 manufacture. One of the original glass xtals has been replaced with a much less interesting style holder. DaveB, NZ - Original Message - From: "Tom Van Baak (mobile)" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Thursday, January 25, 2007 7:31 PM Subject: Re: [time-nuts] Nifty old GR OCXO? >> eBay item 150082419799 (Genrad 475-C)--is this some kind of OCXO >> frequency >> reference? From the description, it sounds like it might be used >> to >> monitor a broadcast transmitter frequency. Be sure and scroll down >> and >> check out the wood and foam oven box and the "quartz plate" >> resonator. >> >> The '56 GR catalog at the bama site doesn't show a 475-C, but >> that's not >> surprising as the 475-C looks quite a bit older. > > Yes, that's a nice example of a mercury thermometer > regulated, ovenized quartz plate oscillator, complete > with balsa wood case and lots of asbestos (not foam) > insulation. I have a couple of these ovens -- though > with 100 kc xtals, not the special broadcast freq. > spkr_volume -- please send me email, OK? > > For other old GR oscillator stuff see: > http://www.leapsecond.com/museum/gr1103a/ > http://www.leapsecond.com/museum/gr1190a/ > http://www.leapsecond.com/museum/gr676b-50kc/ > http://www.leapsecond.com/pages/old-genrad/ > > Of special note, see the 4 patents I have there > on the web page, like this one: > http://www.leapsecond.com/museum/gr676b-50kc/US1967185.pdf > > Would you believe that GR had double ovens all > figured out back in 1931? HP wasn't the first... > > /tvb > > > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.432 / Virus Database: 268.17.8/649 - Release Date: > 23/01/2007 20:40 > ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
