Re: [time-nuts] Super stable BVA Quartz resonators... BVA??
Bruce Griffiths wrote: Bernd T-Online wrote: Bi-convex contours are more difficult to manufacture, as it is required that the symmetry axis of the upper and lower contour must coincide. Also other parameters become worse. For the BVA the manufacturability would also be much worse as it already is. Regards Bernd DK1AG Bernd Whilst traditional optical edging techniques can easily remove any wedge when both surfaces are convex, maintaining alignment of the lens axis with respect to the crystal axes is another matter, at least when using traditional surfacing techniques, with computer controlled surfacing techniques even this can be done. With a planoconvex lens bias polishing or an equivalent technique can be used to adjust the inclination of the plano surface with respect to the crystal axes and this alignment is maintained during edging leaving only axial thickness adjustments to be made. The etching process used to remove cracks and defects after mechanical polishing is anisotropic which may introduce further complications in maintaining alignment and shape. Bruce So Bruce, what source did you read that led you to change your original answer from --it's easy--, to --it's difficult--? (reference your quoted text below: Bi-convex contours are more difficult to manufacture, as it is required that the symmetry axis of the upper and lower contour must coincide. That problem was solved over a century ago in optical lens manufacture. If the two surfaces are spherical, then such decentering is equivalent to adding a wedge, which is easily removed by optical centering and edging techniques. Also other parameters become worse. For the BVA the manufacturability would also be much worse as it already is. -Chuck Harris ___ 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.
Re: [time-nuts] Triaxial Connectors
At 05:53 AM 12/10/2007, Arnold Tibus wrote: HP did apply for their RF-cable another PN from a company with an S as symbol inside a kind of triangle with the PN 1250-1413. Sealectro ___ 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.
Re: [time-nuts] 3 lug triax plug.
Here is one source for this connector, http://www.helmut-singer.de/stock/-148524350.html not cheap, especially with the current exchange rate. They also have cut-off used triax plugs but only twin lug. Regards Robert G8RPI Arnold Tibus [EMAIL PROTECTED] wrote: On Sun, 09 Dec 2007 15:21:46 +0100, Bernd T-Online wrote: BTW: I proudly own a HP2801A plus two crystal sensor elements. However I cannot connect them to the instrument, because the 2801A has a special connector for it. It looks like a smaller version of a BNC connector, but the bayonet has three nipples instead of two. Does anyone on the list know what kind of connector that is and where to get the counterpart (plug)? Regards Bernd DK1AG Bernd and the group, the system voltmeter hp 3437A does have this mentioned connector as I see on my old work horse, sure you mean the same. This connector is for double shielded separate isolated or twinax sym. cable as used for very low voltage signals (thus avoiding unwanted gnd loops). The inner coaxial connector is in fact of lower diameter, but the outside shell has the same size as the std. BNC, but instead having 3 guide pins/slots. Trompeter is one manufacturer, unfortunately I have to dig to find my spare connector in the bag with the manuf. type no on. HP does have a cable for RF-equipment Model 11172B with male on both sides. I add some pictures showing plug and connector. I hope it can help clarifying a bit. Kind regards, Arnold, DK2WT ___ 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. - Support the World Aids Awareness campaign this month with Yahoo! for Good ___ 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.
Re: [time-nuts] 3 lug triax plug.
It's a long time since I used a 2801A, but as I recall the connector is much smaller than the triaxial one used on the 3478A system voltmeter. John At 10:10 AM 12/10/2007, you wrote: Here is one source for this connector, http://www.helmut-singer.de/stock/-148524350.html not cheap, especially with the current exchange rate. They also have cut-off used triax plugs but only twin lug. Regards Robert G8RPI Arnold Tibus [EMAIL PROTECTED] wrote: On Sun, 09 Dec 2007 15:21:46 +0100, Bernd T-Online wrote: BTW: I proudly own a HP2801A plus two crystal sensor elements. However I cannot connect them to the instrument, because the 2801A has a special connector for it. It looks like a smaller version of a BNC connector, but the bayonet has three nipples instead of two. Does anyone on the list know what kind of connector that is and where to get the counterpart (plug)? Regards Bernd DK1AG Bernd and the group, the system voltmeter hp 3437A does have this mentioned connector as I see on my old work horse, sure you mean the same. This connector is for double shielded separate isolated or twinax sym. cable as used for very low voltage signals (thus avoiding unwanted gnd loops). The inner coaxial connector is in fact of lower diameter, but the outside shell has the same size as the std. BNC, but instead having 3 guide pins/slots. Trompeter is one manufacturer, unfortunately I have to dig to find my spare connector in the bag with the manuf. type no on. HP does have a cable for RF-equipment Model 11172B with male on both sides. I add some pictures showing plug and connector. I hope it can help clarifying a bit. Kind regards, Arnold, DK2WT ___ 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. - Support the World Aids Awareness campaign this month with Yahoo! for Good ___ 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. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.17/1179 - Release Date: 12/9/2007 11:06 AM ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
In a message dated 12/9/2007 23:13:34 Pacific Standard Time, [EMAIL PROTECTED] writes: The following just appeared on the web. For those of you who don't know of John, he is THE go to guy for information on crystal oscillators. Seasons Greetings -- Tom John has a great Crystal/Oscillator tutorial on the IEEE website and other mirrors, but it's in HTML format. Does anyone know how to get a PDF copy of this (or PowerPoint, Word, etc) so it can be printed out? thanks, Said **See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000304) ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Does anyone know how to get a PDF copy of this (or PowerPoint, Word, etc) so it can be printed out? Said, Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. /tvb ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Hi Said, Do you mean this PowerPoint file: http://www.ko4bb.com/Timing/Vig-tutorial%208.5.2.0.ppt Regards, Peter Vince John has a great Crystal/Oscillator tutorial on the IEEE website and other mirrors, but it's in HTML format. Does anyone know how to get a PDF copy of this (or PowerPoint, Word, etc) so it can be printed out? thanks, Said ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
In message [EMAIL PROTECTED], Tom Van Baak writes: Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Poul-Henning [1] http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001yBtopic_id=1 -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Tom Van Baak writes: Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) -Chuck Harris ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
I just uploaded the .PDF version to Didier's FTP site. Until he moves it to the appropriate subdirectory, it can be accessed as follows: ftp.ko4bb.com user: manuals password: manuals filename: John_Vig_Quartz_Crystal_Oscillator_Tutorial.pdf Size is about 2.3 MB. -- john, KE5FX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Poul-Henning Kamp Sent: Monday, December 10, 2007 11:30 AM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE I wish somebody could make a pdf of that ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
There's a nice PDF program called PDF Creator (freeware!) that you install like a printer. It will create a PDF of anything you print to it. Get it at: http://www.pdfforge.org/products/pdfcreator Daun -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak Sent: Monday, December 10, 2007 2:09 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE Does anyone know how to get a PDF copy of this (or PowerPoint, Word, etc) so it can be printed out? Said, Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. /tvb ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
It's a nice read, by the way. Has very little to do quartz oscillators specifically, despite its title. -- john, KE5FX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Miles Sent: Monday, December 10, 2007 11:40 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE I just uploaded the .PDF version to Didier's FTP site. Until he moves it to the appropriate subdirectory, it can be accessed as follows: ftp.ko4bb.com user: manuals password: manuals filename: John_Vig_Quartz_Crystal_Oscillator_Tutorial.pdf Size is about 2.3 MB. -- john, KE5FX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Poul-Henning Kamp Sent: Monday, December 10, 2007 11:30 AM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE I wish somebody could make a pdf of that ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
On Mon, 10 Dec 2007 14:36:19 -0500, Chuck Harris [EMAIL PROTECTED] wrote: Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Tom Van Baak writes: Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) Just wasted a couple of hours trying to get that POS to generate a .doc file that my fax software could recognize. I finally had to load MS Turd. Not quite ready for prime time. If someone will point me to the HTML, I'll convert it to pdf. John -- John De Armond See my website for my current email address http://www.neon-john.com http://www.johndearmond.com -- best little blog on the net! Tellico Plains, Occupied TN Hell is truth seen too late. -Hobbs ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
In message [EMAIL PROTECTED], John Miles writes: I just uploaded the .PDF version to Didier's FTP site. Until he moves it to the appropriate subdirectory, it can be accessed as follows: Thanks! It's much improved over the old paper copy I have. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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.
Re: [time-nuts] 3 lug triax plug.
Hi John, Is it actually triaxial or just three lug? I've some small 3 lug coax plugs about 1/2 the size of a BNC. The one's in the link are the same size as a BNC. Robert G8RPI. John Day [EMAIL PROTECTED] wrote: It's a long time since I used a 2801A, but as I recall the connector is much smaller than the triaxial one used on the 3478A system voltmeter. John At 10:10 AM 12/10/2007, you wrote: Here is one source for this connector, http://www.helmut-singer.de/stock/-148524350.html not cheap, especially with the current exchange rate. They also have cut-off used triax plugs but only twin lug. Regards Robert G8RPI Arnold Tibus wrote: On Sun, 09 Dec 2007 15:21:46 +0100, Bernd T-Online wrote: BTW: I proudly own a HP2801A plus two crystal sensor elements. However I cannot connect them to the instrument, because the 2801A has a special connector for it. It looks like a smaller version of a BNC connector, but the bayonet has three nipples instead of two. Does anyone on the list know what kind of connector that is and where to get the counterpart (plug)? Regards Bernd DK1AG Bernd and the group, the system voltmeter hp 3437A does have this mentioned connector as I see on my old work horse, sure you mean the same. This connector is for double shielded separate isolated or twinax sym. cable as used for very low voltage signals (thus avoiding unwanted gnd loops). The inner coaxial connector is in fact of lower diameter, but the outside shell has the same size as the std. BNC, but instead having 3 guide pins/slots. Trompeter is one manufacturer, unfortunately I have to dig to find my spare connector in the bag with the manuf. type no on. HP does have a cable for RF-equipment Model 11172B with male on both sides. I add some pictures showing plug and connector. I hope it can help clarifying a bit. Kind regards, Arnold, DK2WT ___ 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. - Support the World Aids Awareness campaign this month with Yahoo! for Good ___ 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. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.17/1179 - Release Date: 12/9/2007 11:06 AM ___ 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. - Sent from Yahoo! #45; a smarter inbox. ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Neon John wrote: On Mon, 10 Dec 2007 14:36:19 -0500, Chuck Harris [EMAIL PROTECTED] wrote: Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Tom Van Baak writes: Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) Just wasted a couple of hours trying to get that POS to generate a .doc file that my fax software could recognize. I finally had to load MS Turd. Not quite ready for prime time. On the contrary, it is very ready for prime time. Your fax program is probably the one that is wrong. -Chuck Harris ___ 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.
Re: [time-nuts] Super stable BVA Quartz resonators... BVA??
Chuck Harris wrote: Bruce Griffiths wrote: Bernd T-Online wrote: Bi-convex contours are more difficult to manufacture, as it is required that the symmetry axis of the upper and lower contour must coincide. Also other parameters become worse. For the BVA the manufacturability would also be much worse as it already is. Regards Bernd DK1AG Bernd Whilst traditional optical edging techniques can easily remove any wedge when both surfaces are convex, maintaining alignment of the lens axis with respect to the crystal axes is another matter, at least when using traditional surfacing techniques, with computer controlled surfacing techniques even this can be done. With a planoconvex lens bias polishing or an equivalent technique can be used to adjust the inclination of the plano surface with respect to the crystal axes and this alignment is maintained during edging leaving only axial thickness adjustments to be made. The etching process used to remove cracks and defects after mechanical polishing is anisotropic which may introduce further complications in maintaining alignment and shape. Bruce So Bruce, what source did you read that led you to change your original answer from --it's easy--, to --it's difficult--? (reference your quoted text below: No reference (unless you want references to optical manufacturing techniques), its obvious when you stop to think about it, the various crystal cuts (AT, BT, SC etc) require a specific crystallographic orientation, changing the orientation changes the characteristics. When I realised that Bernd hadn't explicitly stated the requirement to maintain crystallographic alignment when contouring the 2 surfaces the real cause of the difficulty of manufacture became obvious. Introducing wedge when generating the spherical (other contours are much more difficult to produce unless one uses computer controlled equipment together with optical shape measurement) surfaces is geometrically equivalent to changing the crystallographic orientation of the blank. This doesnt arise when imparting a spherical contour to only one surface, as the plane surface defines the crystallographic orientation before and after removing any wedge using optical centering/edging techniques. The original statement merely indicated that well known techniques provide a solution to his actual statement of the problem of centering the 2 surfaces. Bi-convex contours are more difficult to manufacture, as it is required that the symmetry axis of the upper and lower contour must coincide. That problem was solved over a century ago in optical lens manufacture. If the two surfaces are spherical, then such decentering is equivalent to adding a wedge, which is easily removed by optical centering and edging techniques. Also other parameters become worse. For the BVA the manufacturability would also be much worse as it already is. -Chuck Harris ___ 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.
Re: [time-nuts] 3 lug triax plug.
At 03:25 PM 12/10/2007, Robert Atkinson wrote: Hi John, Is it actually triaxial or just three lug? I've some small 3 lug coax plugs about 1/2 the size of a BNC. The one's in the link are the same size as a BNC. The one in the link looks like a pretty common triaxial data connector, such as the Trompeter that has been referred to earlier. As I recall the one on the 2801A (and it could be 20 years since I have seen one) is way smaller and has three lugs. It also has, IIRC, a stainless body and the outer wall is comparatively thick with a more pronounced chamfer on the outer edge. John Robert G8RPI. John Day [EMAIL PROTECTED] wrote: It's a long time since I used a 2801A, but as I recall the connector is much smaller than the triaxial one used on the 3478A system voltmeter. John At 10:10 AM 12/10/2007, you wrote: Here is one source for this connector, http://www.helmut-singer.de/stock/-148524350.html not cheap, especially with the current exchange rate. They also have cut-off used triax plugs but only twin lug. Regards Robert G8RPI Arnold Tibus wrote: On Sun, 09 Dec 2007 15:21:46 +0100, Bernd T-Online wrote: BTW: I proudly own a HP2801A plus two crystal sensor elements. However I cannot connect them to the instrument, because the 2801A has a special connector for it. It looks like a smaller version of a BNC connector, but the bayonet has three nipples instead of two. Does anyone on the list know what kind of connector that is and where to get the counterpart (plug)? Regards Bernd DK1AG Bernd and the group, the system voltmeter hp 3437A does have this mentioned connector as I see on my old work horse, sure you mean the same. This connector is for double shielded separate isolated or twinax sym. cable as used for very low voltage signals (thus avoiding unwanted gnd loops). The inner coaxial connector is in fact of lower diameter, but the outside shell has the same size as the std. BNC, but instead having 3 guide pins/slots. Trompeter is one manufacturer, unfortunately I have to dig to find my spare connector in the bag with the manuf. type no on. HP does have a cable for RF-equipment Model 11172B with male on both sides. I add some pictures showing plug and connector. I hope it can help clarifying a bit. Kind regards, Arnold, DK2WT ___ 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. - Support the World Aids Awareness campaign this month with Yahoo! for Good ___ 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. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.17/1179 - Release Date: 12/9/2007 11:06 AM ___ 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. - Sent from Yahoo! #45; a smarter inbox. ___ 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. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.17/1179 - Release Date: 12/9/2007 11:06 AM ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Chuck Harris wrote: Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Tom Van Baak writes: Right click and SaveAs this 7.4 MB PPT file to your PC: Quartz Resonator Oscillator Tutorial http://www.ieee-uffc.org/freqcontrol/tutorials/vig3/vig3.ppt Then open the 298 page document with PowerPoint and print as note pages. I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) -Chuck Harris Chuck That method isnt always very successful especially when newer versions of powerpoint are used to generate the slides. For this particular powerpoint file OpenOffice renders some text on at least one page unreadable. In the case of html pages (at least with Linux or FreeBSD) converting to pdf files can be done by first printing to a postscript file and then opening the resultant postscript file with Ghostview and then printing it to a pdf file. Bruce ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
- Original Message - From: John Miles [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, December 11, 2007 8:50 AM Subject: Re: [time-nuts] John Vig elected President of IEEE It's a nice read, by the way. Has very little to do quartz oscillators specifically, despite its title. -- john, KE5FX There's also this (earlier?) similar HTML paper available - different coverage re quartz oscs etc. Might be an earlier version of the ppt presentation. http://www.ieee-uffc.org/freqcontrol/quartz/vig/vigtoc.htm DaveB, NZ ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Bruce Griffiths wrote: I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) -Chuck Harris Chuck That method isnt always very successful especially when newer versions of powerpoint are used to generate the slides. For this particular powerpoint file OpenOffice renders some text on at least one page unreadable. In the case of html pages (at least with Linux or FreeBSD) converting to pdf files can be done by first printing to a postscript file and then opening the resultant postscript file with Ghostview and then printing it to a pdf file. Bruce Hi Bruce, The difference you are seeing is because there is no equivalent font, on your system, to the microsoft patented font specified in this Powerpoint document. OO.org makes a best guess as to what the document wanted, and uses that for display. Unfortunately, the best guess is about 5% larger in size. This comes about because, Microsoft apparently didn't understand the internationally standardized font sizes when they wrote their Office suite. The open source folks refuse to adapt to broken software as a default condition. I believe if you install the intentionally broken Open source clone of the True Type fonts, you will see the presentation as its author intended (+/- minor changes to stay legal). Powerpoint has its own problems dealing with documents that were made on differing Powerpoint versions, as does the rest of the MSOffice suite. -Chuck Harris ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Peter Vince wrote: Hi Said, Do you mean this PowerPoint file: http://www.ko4bb.com/Timing/Vig-tutorial%208.5.2.0.ppt Regards, Peter Vince Using the term diopters on page 4-57 is potentially confusing. Presumably he means the so called opthalmic (spectacle) industry diopter tools were used to generate the curves. The term diopter strictly means the reciprocal of the focal length (measured in meters) of a lens. The focal length of a thin lens depends on its refractive index and the curvatures of its surfaces. A spectacle industry 1 diopter tool will generate the convex surface of a planoconvex lens with a power of 1 diopter (1m focal length) when the refractive index of the material used is ~1.52. Since the none of the refractive indices (1.54421, 1.55333 @ 600nm) of crystalline quartz are equal to 1.52, labelling the curvatures in this way is potentially misleading. Bruce ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Chuck: HOW TRUE your last sentence!!! I've had to fight many battles with presentations used in training classes that were written using whatever font. Then when you try to present using a machine that doesn't have that particular font installed, you get a HUGE mess! We've even tried going to embedding fonts in the presentations, but even that doesn't always work. I just did some training for the Air Force, so I had to use one of their computers, since it was part of a really nice classroom setup complete with rear projection. However, they had very few fonts on that machine, and it made some of this slides, especially ones with formulas on them, total gibberish. Talk about throwing you off guard! I'd review the material in my hotel room the night before, but when I put the questionable slides up, it would totally confuse me. As a result, my student evaluations weren't so hot. (one commenter said the instructor seemed like he was winging it). I might as well have been! Daun -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris Sent: Monday, December 10, 2007 4:43 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE Bruce Griffiths wrote: I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) -Chuck Harris Chuck That method isnt always very successful especially when newer versions of powerpoint are used to generate the slides. For this particular powerpoint file OpenOffice renders some text on at least one page unreadable. In the case of html pages (at least with Linux or FreeBSD) converting to pdf files can be done by first printing to a postscript file and then opening the resultant postscript file with Ghostview and then printing it to a pdf file. Bruce Hi Bruce, The difference you are seeing is because there is no equivalent font, on your system, to the microsoft patented font specified in this Powerpoint document. OO.org makes a best guess as to what the document wanted, and uses that for display. Unfortunately, the best guess is about 5% larger in size. This comes about because, Microsoft apparently didn't understand the internationally standardized font sizes when they wrote their Office suite. The open source folks refuse to adapt to broken software as a default condition. I believe if you install the intentionally broken Open source clone of the True Type fonts, you will see the presentation as its author intended (+/- minor changes to stay legal). Powerpoint has its own problems dealing with documents that were made on differing Powerpoint versions, as does the rest of the MSOffice suite. -Chuck Harris ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
That's one advantage of using PDF in that kind of situation. The slide show presentation isn't quite as nice as with PowerPoint or OO, but it's much more independent of the environment on the machine. And, of course, OO has a very nice Export to PDF option available for all its modules (write, draw, calc). John Daun Yeagley said the following on 12/10/2007 05:04 PM: Chuck: HOW TRUE your last sentence!!! I've had to fight many battles with presentations used in training classes that were written using whatever font. Then when you try to present using a machine that doesn't have that particular font installed, you get a HUGE mess! We've even tried going to embedding fonts in the presentations, but even that doesn't always work. I just did some training for the Air Force, so I had to use one of their computers, since it was part of a really nice classroom setup complete with rear projection. However, they had very few fonts on that machine, and it made some of this slides, especially ones with formulas on them, total gibberish. Talk about throwing you off guard! I'd review the material in my hotel room the night before, but when I put the questionable slides up, it would totally confuse me. As a result, my student evaluations weren't so hot. (one commenter said the instructor seemed like he was winging it). I might as well have been! Daun -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris Sent: Monday, December 10, 2007 4:43 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE Bruce Griffiths wrote: I wish somebody could make a pdf of that, I don't have (and don't want!) access to Powerpoint[1]. Sure you do, it is called: OpenOffice.org ;-) -Chuck Harris Chuck That method isnt always very successful especially when newer versions of powerpoint are used to generate the slides. For this particular powerpoint file OpenOffice renders some text on at least one page unreadable. In the case of html pages (at least with Linux or FreeBSD) converting to pdf files can be done by first printing to a postscript file and then opening the resultant postscript file with Ghostview and then printing it to a pdf file. Bruce Hi Bruce, The difference you are seeing is because there is no equivalent font, on your system, to the microsoft patented font specified in this Powerpoint document. OO.org makes a best guess as to what the document wanted, and uses that for display. Unfortunately, the best guess is about 5% larger in size. This comes about because, Microsoft apparently didn't understand the internationally standardized font sizes when they wrote their Office suite. The open source folks refuse to adapt to broken software as a default condition. I believe if you install the intentionally broken Open source clone of the True Type fonts, you will see the presentation as its author intended (+/- minor changes to stay legal). Powerpoint has its own problems dealing with documents that were made on differing Powerpoint versions, as does the rest of the MSOffice suite. -Chuck Harris ___ 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/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Super stable BVA Quartz resonators... BVA??
BTW: I proudly own a HP2801A plus two crystal sensor elements. However I cannot connect them to the instrument, because the 2801A has a special connector for it. It looks like a smaller version of a BNC connector, but the bayonet has three nipples instead of two. Does anyone on the list know what kind of connector that is and where to get the counterpart (plug)? Regards Bernd DK1AG Are you sure the probes are for the 2801A? HP produced several(?) quartz thermometers. What are the connectors currently on the probes, and what are the probe product numbers? Jerry **See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000304) ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
May be a dumb question but why don't you just export the slides to bitmap graphics or to a PDF? I rarely give presentations anymore but that's the approach I've always taken, especially if I'm going to have to use other hardware. A series of TIFFs or JPGs and the free Irfanview which will run on a thumb drive or CD and you're set. John On Mon, 10 Dec 2007 17:04:15 -0500, Daun Yeagley [EMAIL PROTECTED] wrote: Chuck: HOW TRUE your last sentence!!! I've had to fight many battles with presentations used in training classes that were written using whatever font. Then when you try to present using a machine that doesn't have that particular font installed, you get a HUGE mess! We've even tried going to embedding fonts in the presentations, but even that doesn't always work. I just did some training for the Air Force, so I had to use one of their computers, since it was part of a really nice classroom setup complete with rear projection. However, they had very few fonts on that machine, and it made some of this slides, especially ones with formulas on them, total gibberish. Talk about throwing you off guard! I'd review the material in my hotel room the night before, but when I put the questionable slides up, it would totally confuse me. As a result, my student evaluations weren't so hot. (one commenter said the instructor seemed like he was winging it). I might as well have been! -- John De Armond See my website for my current email address http://www.neon-john.com http://www.johndearmond.com -- best little blog on the net! Tellico Plains, Occupied TN Alcohol, Tobacco Firearms should be a convenience store, not a government agency. ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
Hi John Yeah, that's my method of choice for my own stuff. Unfortunately, I don't have that option when I'm doing it professionally! Also, normally when I do it I can use my own, or at least a known to me PC. This particular presentation was the presentation from hell though. Daun -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Neon John Sent: Monday, December 10, 2007 5:45 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE May be a dumb question but why don't you just export the slides to bitmap graphics or to a PDF? I rarely give presentations anymore but that's the approach I've always taken, especially if I'm going to have to use other hardware. A series of TIFFs or JPGs and the free Irfanview which will run on a thumb drive or CD and you're set. John On Mon, 10 Dec 2007 17:04:15 -0500, Daun Yeagley [EMAIL PROTECTED] wrote: Chuck: HOW TRUE your last sentence!!! I've had to fight many battles with presentations used in training classes that were written using whatever font. Then when you try to present using a machine that doesn't have that particular font installed, you get a HUGE mess! We've even tried going to embedding fonts in the presentations, but even that doesn't always work. I just did some training for the Air Force, so I had to use one of their computers, since it was part of a really nice classroom setup complete with rear projection. However, they had very few fonts on that machine, and it made some of this slides, especially ones with formulas on them, total gibberish. Talk about throwing you off guard! I'd review the material in my hotel room the night before, but when I put the questionable slides up, it would totally confuse me. As a result, my student evaluations weren't so hot. (one commenter said the instructor seemed like he was winging it). I might as well have been! -- John De Armond See my website for my current email address http://www.neon-john.com http://www.johndearmond.com -- best little blog on the net! Tellico Plains, Occupied TN Alcohol, Tobacco Firearms should be a convenience store, not a government agency. ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
In a message dated 12/10/2007 11:12:04 Pacific Standard Time, [EMAIL PROTECTED] writes: Then open the 298 page document with PowerPoint and print as note pages. /tvb Hi Tom, thanks for the pointer! That worked well. Trying to print the HTML version is mission impossible. Thanks again, bye, Said **See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000304) ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
In a message dated 12/10/2007 13:16:38 Pacific Standard Time, [EMAIL PROTECTED] writes: There's also this (earlier?) similar HTML paper available - different coverage re quartz oscs etc. Might be an earlier version of the ppt presentation. http://www.ieee-uffc.org/freqcontrol/quartz/vig/vigtoc.htm DaveB, NZ Hi Dave, _http://www.ecliptek.com/tech/Vig-tutorial_8.5.1.2_files/frame.htm_ (http://www.ecliptek.com/tech/Vig-tutorial_8.5.1.2_files/frame.htm) this is the one I have been reading, impossible to print with IE6. Same file is on the IEEE site as well. Thanks everyone for the help! bye, Said **See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000304) ___ 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] Fury Interface Board simulation results
Hello Everyone, I have been running simulations of different parts of the Fury Interface board. Here are the results so far. http://www.darksmile.net/ee/index.html Your feedback is most welcome. -George ___ 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.
Re: [time-nuts] John Vig elected President of IEEE
I had it here (desktop), but did not think about uploading it... It's now also at http://www.ko4bb.com/cgi-bin/search.pl?search=John_Vig Thank you John, Didier -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Miles Sent: Monday, December 10, 2007 1:40 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE I just uploaded the .PDF version to Didier's FTP site. Until he moves it to the appropriate subdirectory, it can be accessed as follows: ftp.ko4bb.com user: manuals password: manuals filename: John_Vig_Quartz_Crystal_Oscillator_Tutorial.pdf Size is about 2.3 MB. -- john, KE5FX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Poul-Henning Kamp Sent: Monday, December 10, 2007 11:30 AM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] John Vig elected President of IEEE I wish somebody could make a pdf of that ___ 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.
Re: [time-nuts] Fury Interface Board simulation results
xaos wrote: Hello Everyone, I have been running simulations of different parts of the Fury Interface board. Here are the results so far. http://www.darksmile.net/ee/index.html Your feedback is most welcome. -George ___ 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. George In the JFET frequency doubler: 1) Surely the 50 ohms should be is series with the the voltage source V3 for the simulation? 2) Usually a 1:4 impedance ratio step up transformer on the input is about right with a similar transformer used to step down the output (perhaps an even higher impedance ratio transformer (8:1, 9:1?? may be better). The maximum turns ratio depends somewhat on the maximum allowable drain voltage swing which in turn is limited by the drain supply voltage. In the voltage offset circuit: 1) The junction of R9 and R12 should be connected to the offset source (+5V??). I dont understand what the 7812 does in this circuit. Isolation amplifier looks OK. Bruce ___ 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.
Re: [time-nuts] Fury Interface Board simulation results
Bruce Griffiths wrote: xaos wrote: Hello Everyone, I have been running simulations of different parts of the Fury Interface board. Here are the results so far. http://www.darksmile.net/ee/index.html Your feedback is most welcome. -George ___ 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. George The LS840 series FET Idss is a little on the low side for this application. Something equivalent to a matched pair of J310's would be better suited to this application. The higher Idss of such JFETs allows a larger amplitude second harmonic output. Bruce ___ 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] WIRED Time Nuts
Hi John Rick, Looks like Quinn's WIRED magazine time-nuts article was just released... Article: http://www.wired.com/science/discoveries/news/2007/12/time_hackers Photos: http://www.wired.com/science/discoveries/multimedia/2007/12/gallery_time_hackers Index: http://www.wired.com/science/discoveries /tvb http://www.LeapSecond.com ___ 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.
