Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic
On 7/31/2013 7:06 PM, Dr. Edward H. Currie wrote: DW-40 is a good label goop remover ... Does the DW stand for dyslexic writing? :-) Pretty sure you meant WD-40 as in this link... http://en.wikipedia.org/wiki/WD-40 ___ 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] Removing goop was: =Re: 10811 Outer oven controller schematic
I've found that a lot of sticky things, including sticker glue, is oil soluble. So I just use a liberal amount of vegetable oil with a cloth to dissolve the stuff and get rid of the goop. Then you are left with an oily surface (you probably shouldn't use this method on cloth which might be stained by the vegetable oil). The second stage of the process then can be a variety of cleaners to remove the liquid oil. Dove dishwashing soap can be quite effective. Anyway, this two step process works quite well for a lot of things that would take more work scrubbing and scraping otherwise. In many cases it does a better job, without having to use harsher chemicals. John On 7/31/2013 11:12 PM, Don Latham wrote: I haven't found anything that really removes sticker glue without scarring the paint. Of course, if you want provenance and history, leave 'em on :-) I'm only buying usb new and pre-1930 GR. Howareya? Heading for shooting tomorrow and on to see Argus, then to gun show. Just returned from marrying off step-grandson; Astoria WA. strange town. Don Dr. Edward H. Currie DW-40 is a good label goop remover ... - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, July 31, 2013 8:42 PM Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic Xylene is availble as goof-off in paint departments. Graham This has been an interesting discussion on how to remove goop from stuff. I find that one or the other of the common methyl or ethyl alcohols is sufficient in many cases to remove goop and has proven to be quite safe on almost all surfaces. When one of the common alcohols doesn't work I resort to a product marketed by Circa 1850 under the name of Super DeGooper. The label says it Removes these Goops: Oil Crayon, Tar, Marker, Gum, Labels, Shoe Polish, Adhesive, Duct Tape, Lipstick, Grease, stickers, Dried Latex Paint but in my experience is quite effect on much, much more and is safe on most surfaces. The caution label indicates that it contains xylene. Works for me and when it doesn't I then resort to the much stronger lacquer thinner or acetone. All are flammable and are used carefully with adequate ventilation. And when all else fails, good old scraping is used. cheers, Graham ve3gtc On 13-07-31 11:15 AM, Rex wrote: I suspect by gas he meant gasoline. I don't know about what paint remover he meant but I have another suggestion that might have worked. For cleaning label gunk off of used test equipment I have used automotive bug and tar remover. Seems to loosen up lots of gunk but not so strong it hurts the panel paint and lettering. ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.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. ___ 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] Removing goop was: =Re: 10811 Outer oven controller schematic
Second the WD-40 best label adhesive remover - and is so gentle it will leave the skin on aluminium.. Just spray it on and let it soak in. Can also start the lawn mower / Car / Boat with it, Fix squeaky hinges, lubricate locks.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of John Marvin Sent: Thursday, 1 August 2013 4:29 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic I've found that a lot of sticky things, including sticker glue, is oil soluble. So I just use a liberal amount of vegetable oil with a cloth to dissolve the stuff and get rid of the goop. Then you are left with an oily surface (you probably shouldn't use this method on cloth which might be stained by the vegetable oil). The second stage of the process then can be a variety of cleaners to remove the liquid oil. Dove dishwashing soap can be quite effective. Anyway, this two step process works quite well for a lot of things that would take more work scrubbing and scraping otherwise. In many cases it does a better job, without having to use harsher chemicals. John On 7/31/2013 11:12 PM, Don Latham wrote: I haven't found anything that really removes sticker glue without scarring the paint. Of course, if you want provenance and history, leave 'em on :-) I'm only buying usb new and pre-1930 GR. Howareya? Heading for shooting tomorrow and on to see Argus, then to gun show. Just returned from marrying off step-grandson; Astoria WA. strange town. Don Dr. Edward H. Currie DW-40 is a good label goop remover ... - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, July 31, 2013 8:42 PM Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic Xylene is availble as goof-off in paint departments. Graham This has been an interesting discussion on how to remove goop from stuff. I find that one or the other of the common methyl or ethyl alcohols is sufficient in many cases to remove goop and has proven to be quite safe on almost all surfaces. When one of the common alcohols doesn't work I resort to a product marketed by Circa 1850 under the name of Super DeGooper. The label says it Removes these Goops: Oil Crayon, Tar, Marker, Gum, Labels, Shoe Polish, Adhesive, Duct Tape, Lipstick, Grease, stickers, Dried Latex Paint but in my experience is quite effect on much, much more and is safe on most surfaces. The caution label indicates that it contains xylene. Works for me and when it doesn't I then resort to the much stronger lacquer thinner or acetone. All are flammable and are used carefully with adequate ventilation. And when all else fails, good old scraping is used. cheers, Graham ve3gtc On 13-07-31 11:15 AM, Rex wrote: I suspect by gas he meant gasoline. I don't know about what paint remover he meant but I have another suggestion that might have worked. For cleaning label gunk off of used test equipment I have used automotive bug and tar remover. Seems to loosen up lots of gunk but not so strong it hurts the panel paint and lettering. ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.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. ___ 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.
Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic
On 7/31/2013 5:42 PM, Don Latham wrote: Xylene is availble as goof-off in paint departments. Goof-off now seems to be a whole family of products. See... http://www.goofoffproducts.com/ Maybe Heavy Duty Remover or power Cleaner and Degreaser might be the best current options. The one MDS for Goof-off I looked at didn't mention xylene. At least here in California, I think law has forced removal of xylene and toluene from most products several years back and is tightening more and more. I didn't find a good link describing current laws in my searches. I think the bug and tar remover that I suggested was first formulated with either xylene or toluene but the product I have been using for the last few years doesn't have either of those VOC's mentioned. Probably works less well, but still worked for most of my non-water-based gunk or glue removal tasks. My three main go-to's are soap and water, alcohol, and the bug and tar, depending on what gunk I am looking at. Occasionally I might use acetone, some other hydrocarbon mix, or some of the small remaining amount of MEK I bought before it was banned for sale here. But maybe this is all a bit tangential or off-topic for the group. ___ 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] Trimble Nortel GPSTM Boards
Hi Bob It's certainly very much from the same family, these seem to be a couple of years more recent but obviously aimed at the same spec, and I don't doubt they're going to behave in basically the same way, but given that such things are firmware driven that doesn't exclude possible quirks. By way of example, I'm running this on an indoor antenna right now, not bad but satellites do drop in and out, and at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. Warren S has commented on this with the Thunderbolt so it's no great surprise but I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. Similarly, other than scaling, the DAC voltage on PPS plots are just about identical. Again not a problem, but I was just curious to see if anyone had compared the two side by side. Regards Nigel GM8PZR In a message dated 31/07/2013 22:59:31 GMT Daylight Time, li...@rtty.us writes: Hi From looking at a picture of one, it seems to have all the same stuff on it as the NTGS50 era gizmos. It should behave the same way. Bob On Jul 31, 2013, at 5:42 PM, gandal...@aol.com wrote: Having stuck a late bid on a recent auction for what I'd assumed was a Trimble Nortel NTGS50AA I then realised I'd just bought the single board version, part number 4500-00-CH with the Trimble 49422-CR OCXO. That in itself wasn't a problem, except perhaps the doubts cast over my sanity:-), it arrived earlier today and has been running for several hours now, chatting comfortably with Lady Heather, and generally settling in nicely. However, it does prompt the question, has anyone had a chance to compare one of these side by side with an NTGS50AA and, if so, were there any obvious differences in performance? Regards Nigel GM8PZR ___ 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 ht tps://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] Trimble Nortel GPSTM Boards
Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. * * * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ 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] How quartz crystals are (were) fabricated
Hi The X-Ray process does nothing good to the crystal. It's impact is highly dependent on how dirty the crystal is. Bob On Aug 1, 2013, at 4:14 AM, Charles P. Steinmetz charles_steinm...@lavabit.com wrote: Alberto wrote: A really fascinating story in pictures of the preparation and manufacture of quartz crystals for radio communication. Another interesting historical piece on quartz crystals: http://www.ieee-uffc.org/main/history-bottom.asp Proceedings of the 35th Annual Frequency Control Symposium, pp. 3-12, 1981 The film linked by Alberto referred to a procedure used by Reeves Sound Labs to lower the frequency of crystal blanks by exposing them to intense X-radiation. Does anyone here know how the treated crystals behaved with respect to stability and aging (drift) compared to crystals that did not receive this treatment? (I.e., is this a possible method to improve crystals, or alternatively does it produce crystals with inferior properties?) Best regards, Charles ___ 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] Trimble Nortel GPSTM Boards
Hi You may have your elevation mask set to low for your antenna or a multi path issue from some other source. If the survey location is good to under a meter and the signals are good, there should be very little shift as sats are picked up or dropped. Bob On Aug 1, 2013, at 5:09 AM, gandal...@aol.com wrote: Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. * * * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ 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.
Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic
On Thu, 01 Aug 2013 04:45:14 -0400, time-nuts-requ...@febo.com wrote: Re: time-nuts Digest, Vol 109, Issue 2 Message: 1 Date: Thu, 01 Aug 2013 00:29:06 -0600 From: John Marvin jm-t...@themarvins.org To: time-nuts@febo.com Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic Message-ID: 51fa0032.7010...@themarvins.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed I've found that a lot of sticky things, including sticker glue, is oil soluble. So I just use a liberal amount of vegetable oil with a cloth to dissolve the stuff and get rid of the goop. Then you are left with an oily surface (you probably shouldn't use this method on cloth which might be stained by the vegetable oil). The second stage of the process then can be a variety of cleaners to remove the liquid oil. Dove dishwashing soap can be quite effective. Anyway, this two step process works quite well for a lot of things that would take more work scrubbing and scraping otherwise. In many cases it does a better job, without having to use harsher chemicals. What I've always used is cigarette lighter fluid, which is Naptha in a convenient little can. Paint stores carry VMP Naptha, which is basically the same thing, and cheaper than lighter fluid. I refill my lighter fluid cans with VMP Naptha. I'm told that hair spray also works. Joe Gwinn ___ 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] Removing goop was: =Re: 10811 Outer oven controller schematic
Gentlemen, In my home you will find a fair variety of common solvents. MEK, Toluene And Xylene will always be there. Of course, it is only fair to warn everyone that the common industrial manufacture of Toluene and Xylene do not remove all of the closely related (chemically) and universally recognized carcinogen. Therefore, use reasonable care and ventilation and not more than you have to. You can't expect the less harmful and more commonly used aliphatics like the alcohols, to remove the tarry stuff. And if you don't want to remove your desirable finishes you can go to the chlorinated solvents. But be warned that those are known to cause funny bumps and growths in you, too! But just in case I've scared you off I will finish with a statement that when I come in contact with poisonous plant material and begin to itch I simply take MEK or Toluene on a paper towel and use it to energetically remove the invisible waxy stuff that the plant uses to make sure the irritant stays in place and causes the misery of blisters and open sores! If you get this done in the itch stage and before the blisters appear you will be very pleasantly surprised! Even my daughter-in-law, who agrees with very little I say, admits I'm right about this! Regards, Lee Mushel - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, July 31, 2013 11:12 PM Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic I haven't found anything that really removes sticker glue without scarring the paint Xylene is availble as goof-off in paint departments. Graham This has been an interesting discussion on how to remove goop from stuff. I find that one or the other of the common methyl or ethyl alcohols is sufficient in many cases to remove goop and has proven to be quite safe on almost all surfaces. When one of the common alcohols doesn't work I resort to a product marketed by Circa 1850 under the name of Super DeGooper. The label says it Removes these Goops: Oil Crayon, Tar, Marker, Gum, Labels, Shoe Polish, Adhesive, Duct Tape, Lipstick, Grease, stickers, Dried Latex Paint but in my experience is quite effect on much, much more and is safe on most surfaces. The caution label indicates that it contains xylene. Works for me and when it doesn't I then resort to the much stronger lacquer thinner or acetone. All are flammable and are used carefully with adequate ventilation. And when all else fails, good old scraping is used. cheers, Graham ve3gtc On 13-07-31 11:15 AM, Rex wrote: I suspect by gas he meant gasoline. I don't know about what paint remover he meant but I have another suggestion that might have worked. For cleaning label gunk off of used test equipment I have used automotive bug and tar remover. Seems to loosen up lots of gunk but not so strong it hurts the panel paint and lettering. ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.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. ___ 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.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. ___ 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] How quartz crystals are (were) fabricated
all crystals would have been subject to X-rays to some extent because this was how the planes were located and the cutting angles determined. The dose rate was probably quite low in this case.I dont remember seeing much protection around the machine in the lab I worked in. Alan G3NYK - Original Message - From: Charles P. Steinmetz charles_steinm...@lavabit.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, August 01, 2013 2:52 PM Subject: Re: [time-nuts] How quartz crystals are (were) fabricated Bob wrote: The X-Ray process does nothing good to the crystal. It's impact is highly dependent on how dirty the crystal is. Bob, Do you have authoritative references for this proposition? If not, can you identify what data and what inferences it is based on? I could imagine the X-ray process relieving stress in the crystal (perhaps to advantage), or disrupting the crystal structure (likely detrimental). I'm interested to know if anyone has researched this in a systematic way and, if so, what they found. (My intuition favors the disruption hypothesis over stress relief, but I'm much more interested in research and data than in intuition or speculation.) Data on other forms of radiation would also be interesting, if research has been done. (We already know that heat can be beneficial, at least in certain circumstances, so I'm not so interested in that at the moment.) Of course, when the X-ray technique was developed most crystals were not housed in evacuated holders, so atmospheric and environmental factors were larger contributors (at least to aging) than they are today. That could have obscured researchers' ability to discriminate the effects of the X-ray treatment in contemporaneous testing. Best regards, Charles ___ 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] Removing goop was: =Re: 10811 Outer oven controller schematic
Scary stuff. But love the poison answer. Both of those do actually scare me. Regards Paul On Thu, Aug 1, 2013 at 11:27 AM, Lee Mushel herbe...@centurytel.net wrote: Gentlemen, In my home you will find a fair variety of common solvents. MEK, Toluene And Xylene will always be there. Of course, it is only fair to warn everyone that the common industrial manufacture of Toluene and Xylene do not remove all of the closely related (chemically) and universally recognized carcinogen. Therefore, use reasonable care and ventilation and not more than you have to. You can't expect the less harmful and more commonly used aliphatics like the alcohols, to remove the tarry stuff. And if you don't want to remove your desirable finishes you can go to the chlorinated solvents. But be warned that those are known to cause funny bumps and growths in you, too! But just in case I've scared you off I will finish with a statement that when I come in contact with poisonous plant material and begin to itch I simply take MEK or Toluene on a paper towel and use it to energetically remove the invisible waxy stuff that the plant uses to make sure the irritant stays in place and causes the misery of blisters and open sores! If you get this done in the itch stage and before the blisters appear you will be very pleasantly surprised! Even my daughter-in-law, who agrees with very little I say, admits I'm right about this! Regards, Lee Mushel - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, July 31, 2013 11:12 PM Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic I haven't found anything that really removes sticker glue without scarring the paint Xylene is availble as goof-off in paint departments. Graham This has been an interesting discussion on how to remove goop from stuff. I find that one or the other of the common methyl or ethyl alcohols is sufficient in many cases to remove goop and has proven to be quite safe on almost all surfaces. When one of the common alcohols doesn't work I resort to a product marketed by Circa 1850 under the name of Super DeGooper. The label says it Removes these Goops: Oil Crayon, Tar, Marker, Gum, Labels, Shoe Polish, Adhesive, Duct Tape, Lipstick, Grease, stickers, Dried Latex Paint but in my experience is quite effect on much, much more and is safe on most surfaces. The caution label indicates that it contains xylene. Works for me and when it doesn't I then resort to the much stronger lacquer thinner or acetone. All are flammable and are used carefully with adequate ventilation. And when all else fails, good old scraping is used. cheers, Graham ve3gtc On 13-07-31 11:15 AM, Rex wrote: I suspect by gas he meant gasoline. I don't know about what paint remover he meant but I have another suggestion that might have worked. For cleaning label gunk off of used test equipment I have used automotive bug and tar remover. Seems to loosen up lots of gunk but not so strong it hurts the panel paint and lettering. __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/**mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/**mailman/listinfo/time-nutshttps://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-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and
Re: [time-nuts] How quartz crystals are (were) fabricated
Hi The only known impact of radiation on quartz crystals is to move impurities around in the lattice. That's going to be a bad thing. There have been many papers on this. If you want to dig into them, digging into a good index of the FCS proceedings is a good starting point. The crystals shown in the movie were going into pressure holders. The whole stress / strain / frequency thing was well in the future in 1943. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles P. Steinmetz Sent: Thursday, August 01, 2013 9:53 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] How quartz crystals are (were) fabricated Bob wrote: The X-Ray process does nothing good to the crystal. It's impact is highly dependent on how dirty the crystal is. Bob, Do you have authoritative references for this proposition? If not, can you identify what data and what inferences it is based on? I could imagine the X-ray process relieving stress in the crystal (perhaps to advantage), or disrupting the crystal structure (likely detrimental). I'm interested to know if anyone has researched this in a systematic way and, if so, what they found. (My intuition favors the disruption hypothesis over stress relief, but I'm much more interested in research and data than in intuition or speculation.) Data on other forms of radiation would also be interesting, if research has been done. (We already know that heat can be beneficial, at least in certain circumstances, so I'm not so interested in that at the moment.) Of course, when the X-ray technique was developed most crystals were not housed in evacuated holders, so atmospheric and environmental factors were larger contributors (at least to aging) than they are today. That could have obscured researchers' ability to discriminate the effects of the X-ray treatment in contemporaneous testing. Best regards, Charles ___ 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] How quartz crystals are (were) fabricated
Hi Remember, this was 1943. You can pick up a number of things in most scenes in the movie that would get an OSHA inspector very worried today (and rightly so). Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles P. Steinmetz Sent: Thursday, August 01, 2013 11:54 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] How quartz crystals are (were) fabricated Alan wrote: all crystals would have been subject to X-rays to some extent because this was how the planes were located and the cutting angles determined. The dose rate was probably quite low in this case Right. The film that Alberto posted a link to also showed (beginning at 35:30) a procedure that Reeves Sound Labs devised to lower the frequency of a crystal after final testing, using a powerful beam of X-rays that alter[s] certain properties of the quartz itself. The jig looks to have quite a bit of lead shielding, although I thought they could have sealed the gap around the sliding drawer somewhat better (it does appear to be a redundant seal). Best regards, Charles ___ 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] How quartz crystals are (were) fabricated
-- Date: Wed, 31 Jul 2013 19:14:58 -0400 From: Bob Camp 2) I'll *guarantee* that the workers in the pictures didn't show up for work on a normal work day dressed like that. -- Fascinating video - well worth the 40 minutes spent watching it. Yeah - I noticed the manicured and painted nails as well as women dunking trays into etching baths in their Sunday Finest... Aside from the manufacturing process showing how labor intensive it was, it also added yet another dimention to what Rosie the Riveter's contribution to the war effort. ___ 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] How quartz crystals are (were) fabricated
Hi Charles yes I didn't actually run the videowas saving it for later :-)) this suggests bond disruption is being used. Like musical string if you stiffen the material the resonant frequency should drop. One can only guess this is what might be happening. The lab I was working in (though not on crystals) was producing high quality standards for BC and telecoms, and was part of the then Post Office Engineering Department of Research branch. I never heard of that method (X-rays) for trimming crystals mentioned. This is probably because they were not a bulk manufacturer. The more usual method they used was to plate for a little longer in the vacuum evaporation stage.easy on one-offs :-)) the WWII 10XJ and FT243 (or was it FT241?) were not plated and you can only raise their frequency by lapping. The Ham method with soft lead pencil (or drafting ink) would not be allowed!. Alan - Original Message - From: Charles P. Steinmetz charles_steinm...@lavabit.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, August 01, 2013 4:54 PM Subject: Re: [time-nuts] How quartz crystals are (were) fabricated Alan wrote: all crystals would have been subject to X-rays to some extent because this was how the planes were located and the cutting angles determined. The dose rate was probably quite low in this case Right. The film that Alberto posted a link to also showed (beginning at 35:30) a procedure that Reeves Sound Labs devised to lower the frequency of a crystal after final testing, using a powerful beam of X-rays that alter[s] certain properties of the quartz itself. The jig looks to have quite a bit of lead shielding, although I thought they could have sealed the gap around the sliding drawer somewhat better (it does appear to be a redundant seal). Best regards, Charles ___ 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] Trimble Nortel GPSTM Boards
Hi Nigel! This has been discussed before in time-nuts. I have two of the big boards, but they are not running right now. If I remember correctly the big ones are more of a cost reduction model compared to the 2 board split solition. Giving lower SV snr than the split version. But my ran just fine compared to my standard Tbolts. -- Björn Skickat från min Mobil Originalmeddelande Från: gandal...@aol.com Datum: 2013-08-01 11:09 (GMT+01:00) Till: time-nuts@febo.com Rubrik: Re: [time-nuts] Trimble Nortel GPSTM Boards Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. * * * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ 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.
Re: [time-nuts] Industrial control systems and IEEE 1588v2 time sync
This is true, but what´s needed to generate the sync packets? I think they call them Grand Masters, and cost a lot of money... Is there any cheap approach for this end of the problem? Daniel Em 31/07/2013 08:03, Bob Camp escreveu: Hi A number of the chip guys will sell you micro's that have one or more 1588 ethernet ports on them. Some of them are in the sub $10 range. With a bit of Time Nut attention, they seem to be capable of well under 1 us performance. If you have a daisy chain network they will do what you need without any switches. As mentioned above, if your network has modern (gigabit rather than 10 megabit) switches on it, you can likely get to 1 us without any fancy time stamping switches. There are a few other minor details you would want to pay attention to, but they are manageable for a shop floor network. Bob On Jul 31, 2013, at 12:19 AM, Bill Hawkins b...@iaxs.net wrote: Group, Has anyone used IEEE 1588 to synchronize clocks on an Ethernet network? I was involved in the design of time sync for Foundation Fieldbus circa 2000. We needed one millisecond accuracy, so we went with SNTP on local networks. I've just seen an ad for a switch that can do 1588, and looked up what it does. Microsecond accuracy is impressive, but what does it cost? Industrial sensors are generally sampled at about 10 millisecond intervals out to several seconds. SNTP would appear to be very adequate for time stamps as there is uncertainty introduced by when the computer gets around to sampling the sensor in its sampling and control cycle. Any thoughts appreciated. Bill Hawkins ___ 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.
Re: [time-nuts] Industrial control systems and IEEE 1588v2 time sync
Cesium-based grandmasters can cost a lot of money but I think that GPSDO-based ones are a lot cheaper. On Thu, Aug 1, 2013 at 11:48 PM, Daniel Mendes dmend...@gmail.com wrote: This is true, but what´s needed to generate the sync packets? I think they call them Grand Masters, and cost a lot of money... Is there any cheap approach for this end of the problem? Daniel Em 31/07/2013 08:03, Bob Camp escreveu: Hi A number of the chip guys will sell you micro's that have one or more 1588 ethernet ports on them. Some of them are in the sub $10 range. With a bit of Time Nut attention, they seem to be capable of well under 1 us performance. If you have a daisy chain network they will do what you need without any switches. As mentioned above, if your network has modern (gigabit rather than 10 megabit) switches on it, you can likely get to 1 us without any fancy time stamping switches. There are a few other minor details you would want to pay attention to, but they are manageable for a shop floor network. Bob On Jul 31, 2013, at 12:19 AM, Bill Hawkins b...@iaxs.net wrote: Group, Has anyone used IEEE 1588 to synchronize clocks on an Ethernet network? I was involved in the design of time sync for Foundation Fieldbus circa 2000. We needed one millisecond accuracy, so we went with SNTP on local networks. I've just seen an ad for a switch that can do 1588, and looked up what it does. Microsecond accuracy is impressive, but what does it cost? Industrial sensors are generally sampled at about 10 millisecond intervals out to several seconds. SNTP would appear to be very adequate for time stamps as there is uncertainty introduced by when the computer gets around to sampling the sensor in its sampling and control cycle. Any thoughts appreciated. Bill Hawkins ___ 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 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] Industrial control systems and IEEE 1588v2 time sync
Hi It all depends …. If you need to trace back to an ultimate standard, then yes you need some sort of uber master. If having everything within 1 us of everything else is fine, then no you don't need some sort of uber master. You do need to declare one of your gizmos to be the authority on what time it is. If nobody is in charge, then things get a bit nutty. Bob On Aug 1, 2013, at 5:48 PM, Daniel Mendes dmend...@gmail.com wrote: This is true, but what´s needed to generate the sync packets? I think they call them Grand Masters, and cost a lot of money... Is there any cheap approach for this end of the problem? Daniel Em 31/07/2013 08:03, Bob Camp escreveu: Hi A number of the chip guys will sell you micro's that have one or more 1588 ethernet ports on them. Some of them are in the sub $10 range. With a bit of Time Nut attention, they seem to be capable of well under 1 us performance. If you have a daisy chain network they will do what you need without any switches. As mentioned above, if your network has modern (gigabit rather than 10 megabit) switches on it, you can likely get to 1 us without any fancy time stamping switches. There are a few other minor details you would want to pay attention to, but they are manageable for a shop floor network. Bob On Jul 31, 2013, at 12:19 AM, Bill Hawkins b...@iaxs.net wrote: Group, Has anyone used IEEE 1588 to synchronize clocks on an Ethernet network? I was involved in the design of time sync for Foundation Fieldbus circa 2000. We needed one millisecond accuracy, so we went with SNTP on local networks. I've just seen an ad for a switch that can do 1588, and looked up what it does. Microsecond accuracy is impressive, but what does it cost? Industrial sensors are generally sampled at about 10 millisecond intervals out to several seconds. SNTP would appear to be very adequate for time stamps as there is uncertainty introduced by when the computer gets around to sampling the sensor in its sampling and control cycle. Any thoughts appreciated. Bill Hawkins ___ 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 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] Trimble Nortel GPSTM Boards
I am seeing the same thing -- big jumps every single time a satellite is counted or not. Elevation mask 10 degrees, which should be very good and stable for my location. The unit also insists on converging to a bat altitude, then after a while declares stored position bad . .. then declares position good, even with bad altitude. Ideas appreciated. jimwb4...@amsat.org On 8/1/2013 6:31 AM, Bob Camp wrote: Hi You may have your elevation mask set to low for your antenna or a multi path issue from some other source. If the survey location is good to under a meter and the signals are good, there should be very little shift as sats are picked up or dropped. Bob On Aug 1, 2013, at 5:09 AM, gandal...@aol.com wrote: Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. * * * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ 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 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] Trimble Nortel GPSTM Boards
Buggy firmware? Anyone seen the firmware floating around? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Sanford Sent: Friday, 2 August 2013 10:46 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Trimble Nortel GPSTM Boards I am seeing the same thing -- big jumps every single time a satellite is counted or not. Elevation mask 10 degrees, which should be very good and stable for my location. The unit also insists on converging to a bat altitude, then after a while declares stored position bad . .. then declares position good, even with bad altitude. Ideas appreciated. jimwb4...@amsat.org On 8/1/2013 6:31 AM, Bob Camp wrote: Hi You may have your elevation mask set to low for your antenna or a multi path issue from some other source. If the survey location is good to under a meter and the signals are good, there should be very little shift as sats are picked up or dropped. Bob On Aug 1, 2013, at 5:09 AM, gandal...@aol.com wrote: Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. * * * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ 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 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] How quartz crystals are (were) fabricated
I can't find it but I saw a reference to how may units were made during WWII, does anyone have the number and the reference ? -pete On Wed, Jul 31, 2013 at 2:59 PM, Alberto di Bene dib...@usa.net wrote: A really fascinating story in pictures of the preparation and manufacture of quartz crystals for radio communication. Dating back to 1943... how times have changed... Copied from another list. http://archive.org/details/**6101_Crystals_Go_to_War_01_20_**16_21http://archive.org/details/6101_Crystals_Go_to_War_01_20_16_21 73 Alberto I2PHD __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://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] How quartz crystals are (were) fabricated
Hi: Speaking of old crystals, I found the crystal in the URC-4 survival radio is packaged in an axial lead machined metal can. See Fig. 9 at: http://www.prc68.com/I/URC4.html or go straight to the photo at: http://www.prc68.com/I/Images/URC410b.jpg Does anyone know the package designation and if any other crystals are available in that package? Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html ___ 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] How quartz crystals are (were) fabricated
I don't remember the package designation anymore, but it was common among navy receivers, such as the URR-27, 33, 35... -Chuck Harris Brooke Clarke wrote: Hi: Speaking of old crystals, I found the crystal in the URC-4 survival radio is packaged in an axial lead machined metal can. See Fig. 9 at: http://www.prc68.com/I/URC4.html or go straight to the photo at: http://www.prc68.com/I/Images/URC410b.jpg Does anyone know the package designation and if any other crystals are available in that package? Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html ___ 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] How quartz crystals are (were) fabricated
See: http://www.prc68.com/I/Images/URC407b.jpg Ah, for the days when circuit diagrams were supplied with the unit! David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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.
