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N_Cook <diverse@tcp.co.uk>: Aug 03 02:42PM +0100 A very basic one https://www.screwfix.com/p/titan-mk715-laser-distance-measurer/5151p Great having a reason to get inside (to extend the display hopefully by about 1 metre, separate from the works. 4 back plane , 20 way ribbon including 2 for DC to the backlight. In use you can feel something physically moving inside in operation. This is a simple swinging gate flap that is closed or open, driven by a little electromagnet. A crude white paint patch on this swing-arm intercepts the laser to reflect into the receive section or back to the dividing wall, otherwise all black inside. So instead of pulse timing/phase difference if modulated, is it doing something else, or or is some sort of calibration of the laser power required ?

Andy Burns <usenet@andyburns.uk>: Aug 03 02:54PM +0100 N_Cook wrote:   > A very basic one   My Bosch one uses a phase shift rather than time-of-flight, this chap did a tear-down and reverse engineering, in several parts   <https://www.youtube.com/watch?v=PsnzorA0WSs>

"pfjw@aol.com" <peterwieck33@gmail.com>: Aug 03 07:03AM -0700 On Friday, August 3, 2018 at 9:54:59 AM UTC-4, Andy Burns wrote:   > My Bosch one uses a phase shift rather than time-of-flight, this chap > did a tear-down and reverse engineering, in several parts   > <https://www.youtube.com/watch?v=PsnzorA0WSs>   https://home.howstuffworks.com/laser-tape-measure.htm   Yep. There are several types - with phase-shift devices typically limited to shorter distances than time-of-flight devices. Typically. Not Always!   And (also typically) much more accurate than a long metal tape, and easier to use than a cloth tape.   Peter Wieck Melrose Park, PA

"pfjw@aol.com" <peterwieck33@gmail.com>: Aug 03 07:07AM -0700 On Friday, August 3, 2018 at 9:42:38 AM UTC-4, N_Cook wrote:   > So instead of pulse timing/phase difference if modulated, is it doing > something else, or or is some sort of calibration of the laser power > required ?   Some professional laser devices used by surveyors and civil engineers do require calibration. As when two ends of a bridge meet in the middle, 1/8" (3.175 mm) does matter.   Peter Wieck Melrose Park, PA

N_Cook <diverse@tcp.co.uk>: Aug 03 04:12PM +0100 On 03/08/2018 14:54, Andy Burns wrote:   > My Bosch one uses a phase shift rather than time-of-flight, this chap > did a tear-down and reverse engineering, in several parts   > <https://www.youtube.com/watch?v=PsnzorA0WSs>   Admittedly I skipped thru most of that, but I did not see what the function is of this close-coupled mechanical litteral gating .

"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Aug 03 04:57PM +0800 On 8/1/2018 3:19 AM, George Herold wrote:   > I think class 1 is less than 1mW in the visible. > We sell a class 3B laser.. it's in the NIR... no blink reflex. > (I always encourage people to buy extra laser goggles.)   Do you trust and buy Class 1 laser products manufactured by Chinese and Asians? :)   -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa

"pfjw@aol.com" <peterwieck33@gmail.com>: Aug 03 04:06AM -0700 I try to purchase as little as possible of Chinese origin. Too often the quality is simply not quite there yet. Obviously there are exceptions - pretty much the entire smart-phone industry is centered in China. Another reason to avoid China is that it is fast becoming the most polluted country on the planet and working hard to get there as fast as possible. purchasing goods from more regulated sources, if possible, is better for the planet as a whole.   On the other hand, most Asian countries starting with Japan, South Korea and others have a very nearly fanatical commitment to quality as it applies to automobiles and similar moving parts.   Peter Wieck Melrose Park, PA

etpm@whidbey.com: Aug 02 08:59AM -0700 As was suggested it was the GFCI itself that was the problem when inductive loads were switched off. I tested every GFCI receptacle in the house and found that they all test fine using the test and reset buttons. I found one other GFCI that would trip when the hair clippers were turned off. I replaced one GFCI with a Leviton unit and tried to get it to trip and it would not, no matter if it was the washer or the the clippers. None of the exterior GFCI receptacles would trip. One in one bathroom and one in the kitchen would trip. Our basement has high humidity, which I am working on to eliminate. The bathroom gets humid too. But the kitchen does not, even when boiling big pots of water, so I don't know if humidity has caused problems or if it is just chance. Anyway, at 26 bucks a pop from the local hardware store it would cost a lot to replace all the GFCIs in the house. I need to do some online shopping. Thanks for the help folks! Eric

Jon Elson <elson@pico-systems.com>: Aug 02 01:43PM -0500 On Thu, 02 Aug 2018 08:59:26 -0700, etpm wrote:   > Anyway, at 26 bucks a pop from the local hardware store it would cost a > lot to replace all the GFCIs in the house. I need to do some online > shopping. Yes, I have had to replace several older GFCIs that were starting to get nuisance trips. The new units worked fine. I'm guessing that the constant assault of transients slowly deteriorates them.   Jon

tabbypurr@gmail.com: Aug 02 04:19PM -0700 On Thursday, 2 August 2018 19:43:55 UTC+1, Jon Elson wrote: > nuisance trips. The new units worked fine. I'm guessing that the > constant assault of transients slowly deteriorates them.   > Jon   I expect it's caps losing capacity     NT

jurb6006@gmail.com: Aug 02 04:50PM -0700 >"I expect it's caps losing capacity "   If it has any. Anyone ever take one apart ?

tabbypurr@gmail.com: Aug 03 03:21AM -0700 > >"I expect it's caps losing capacity "   > If it has any. Anyone ever take one apart ?   Not me. I presume there are 1 or more caps to filter hf output from the differential current transformer. One day we shall see.     NT

Andy Burns <usenet@andyburns.uk>: Aug 03 11:27AM +0100 >>> "I expect it's caps losing capacity"   >> If it has any. Anyone ever take one apart ?   > Not me. I presume there are 1 or more caps to filter hf output from the differential current transformer. One day we shall see.   Other than the difference in EU vs USA naming, not sure if there are physical differences between RCDs/RCBOs and GFCIs?   <https://www.youtube.com/watch?v=TRUBlZCNo8U>

Jeff Liebermann <jeffl@cruzio.com>: Aug 02 12:39PM -0700 On Thu, 2 Aug 2018 04:22:32 -0700 (PDT), "pfjw@aol.com" >largely made of Melamine, you might consider slicing one of >those for the purposes. But, DO remember what happens to >them when heated.   Good point. The patent mumbled something about it being safe because the soldering iron is at a lower temperature than the breakdown temperature for melamine (345 °C or 653 °F)[1].   Solder melts at various temperatures depending on composition. Pb63/Sn37 melts at about 188 °C while the unleaded crap melts at about 220 °C. The soldering iron tip run somewhat hotter than this, probably at 250 °C and 280 °C respectively. I'm not sure what my Weller irons are running for a tip temperature, but I'll check. I have a Hakko FG-100 buried somewhere.   Anyway, there seems to be a sufficient margin between the tip temperature and where melamine breaks down.   [1] <https://en.wikipedia.org/wiki/Melamine>       -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann <jeffl@cruzio.com>: Aug 02 12:55PM -0700 On Wed, 1 Aug 2018 22:19:15 -0500, Fox's Mercantile <jdangus@att.net> wrote:   >On 8/1/18 5:36 PM, Jeff Liebermann wrote: >> You must be a Prepper.   >Now that's funny.   It was meant to be a compliment. The alternative is that you are a junk collector, pack rat, or hoarder.   >Preppers are a special type of stupid >because they think THEY are the ones that will survive >the (hoped for) apocalypse.   It's really a philosophical issue that distinguishes preppers from survivalists. A prepper believe that the way to survive the Trump administration is to run away to the hills when the SHTF. A survivalists stocks up, fortifies his house, and prepares to fight off everybody. I don't think spare parts for your electronic devices will help in either case.   >how much of your survival stuff requires gasoline, or >electricity or manufactured stuff (like ammunition) to >work.   Yep. It's kinda like Y2K on steroids. I sold quite a few computahs to those panicked by threat of a Y2K computer meltdown which didn't happen. I'm sure various entrepreneurs notices and decided to perpetuate the fears to generate some business.   >OEM spare parts was acquired at surplus stores, swapmeets, >garage and estate sales And the occasion "Score!" on eBay >the Free Cycle mailing lists or Craig's list.   Ditto, and in the same city (as you well know). At one time, I was dragging home car loads of junk from the TRW flea market or JJ Glass. Most of that has been recycles as I lacked the time to fix the stuff, and the space to store it as its value depreciated. I also found it less fashionable to be surrounded by electronic boat anchors. My lab is still very much 1970-1980 vintage test equipment, which is well worth keeping. But, if I buy any replacements, it will be something much newer.   Incidentally, when I buy something on eBay, if I want to work, I buy three. One to use, and two for spare parts: <http://www.learnbydestroying.com/jeffl/pics/home/slides/BL-shop5.html>   -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

The Real Bev <bashley101@gmail.com>: Aug 02 01:20PM -0700 On 08/02/2018 12:55 PM, Jeff Liebermann wrote: > survivalists stocks up, fortifies his house, and prepares to fight off > everybody. I don't think spare parts for your electronic devices will > help in either case.   Civilization started when man made fire. I've got five gross of Bic lighters packed in cosmoline in my basement. I'm good.   >>OEM spare parts was acquired at surplus stores, swapmeets, >>garage and estate sales And the occasion "Score!" on eBay >>the Free Cycle mailing lists or Craig's list.   Ever hit C&H, L&R or Everett's in Pasadena?   > Ditto, and in the same city (as you well know). At one time, I was > dragging home car loads of junk from the TRW flea market or JJ Glass.   Remember Durk Pearson in the skimpy leather shorts?   Olden tymes...   -- Cheers, Bev "Johnston [Island] was the home of a U.S. chemical weapons disposal facility for 10 years before operations ended in November 2000. The island was turned into a wildlife preserve." © 2002 The Associated Press

Jeff Liebermann <jeffl@cruzio.com>: Aug 02 04:11PM -0700 On Thu, 2 Aug 2018 13:20:24 -0700, The Real Bev <bashley101@gmail.com> wrote:   >Civilization started when man made fire.   Civilization started when man made fire and then offered to rent the use of his camp fire to anyone who could pay the price. Commerce was invented when the fire man started selling camp fire use licenses and charging royalties for the resale of the fire he had invented.   >I've got five gross of Bic >lighters packed in cosmoline in my basement. I'm good.   Good idea. It might be useful for self immolation if things go awry. Cosmoline is petroleum based and quite flammable at high temperatures. It just melts, drips, and runs at temperatures below the ignition point, and then the whole thing erupts in flames once above the ignition point. I found out the hard way when trying to "melt" the stuff off a military surplus Jeep engine.   >Ever hit C&H, L&R or Everett's in Pasadena?   C&H yes. I don't recall L&R or Everett's. Pasadena was not on my beaten path. Also, I escaped from Smog Angeles in about 1973.   >> dragging home car loads of junk from the TRW flea market or JJ Glass.   >Remember Durk Pearson in the skimpy leather shorts? >Olden tymes...   Nope. <https://www.google.com/search?q=Durk+Pearson&tbm=isch> In my spare time, I hung around Santa Monica where skimp leather shorts were just one of the many de rigueur uniforms. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Fox's Mercantile <jdangus@att.net>: Aug 02 11:30PM -0500 On 8/2/18 3:20 PM, The Real Bev wrote:   > Ever hit C&H, L&R or Everett's in Pasadena?   Ah yes, Cutthroat and Highprice. And of course JJ Glass, and previously Palley's.   > Remember Durk Pearson in the skimpy leather shorts?   Those weren't shorts, it was more like a thong.   Personally, I liked the dwarf running around more.     -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com

The Real Bev <bashley101@gmail.com>: Aug 02 10:53PM -0700 On 08/02/2018 04:11 PM, Jeff Liebermann wrote: > use of his camp fire to anyone who could pay the price. Commerce was > invented when the fire man started selling camp fire use licenses and > charging royalties for the resale of the fire he had invented.   And Law was invented when the lincensee attacked the licenser with his spiky club when the licensee's fire ceased operation after the first rainstorm.   > point, and then the whole thing erupts in flames once above the > ignition point. I found out the hard way when trying to "melt" the > stuff off a military surplus Jeep engine.   The BOX is covered with cosmoline!   >>Ever hit C&H, L&R or Everett's in Pasadena?   > C&H yes. I don't recall L&R or Everett's. Pasadena was not on my > beaten path. Also, I escaped from Smog Angeles in about 1973.   L&R was further to the east, and was owned by Pappy Dow of Dow Radio fame. Dow went belly up maybe 10 years ago, but it had a good run. We did our heavy shopping in 1962-4.   C&H closed maybe 10 years ago. The sign is still there, but it was some sort of fitness club last time I looked.   > <https://www.google.com/search?q=Durk+Pearson&tbm=isch> > In my spare time, I hung around Santa Monica where skimp leather > shorts were just one of the many de rigueur uniforms.   He went to all the TRW swap meets and was quite a striking figure. I don't think we bought much there, but it was fun to look at.   -- Cheers, Bev "Arguing on the internet is like running a race in the Special Olympics: even if you win, you're still retarded."

The Real Bev <bashley101@gmail.com>: Aug 02 11:00PM -0700 On 08/02/2018 09:30 PM, Fox's Mercantile wrote: > On 8/2/18 3:20 PM, The Real Bev wrote:   >> Ever hit C&H, L&R or Everett's in Pasadena?   > Ah yes, Cutthroat and Highprice.   Depends on what you wanted, I guess. We were building a tape recorder at the time and needed weird stuff.   > And of course JJ Glass, and previously Palley's.   Never heard of Glass, but we went to Palley's quite a bit.   >> Remember Durk Pearson in the skimpy leather shorts?   > Those weren't shorts, it was more like a thong.   > Personally, I liked the dwarf running around more.   I don't remember a dwarf...   -- Cheers, Bev "Anonymity is a shield from the tyranny of the majority." -- U.S. Supreme Court, McIntyre v Ohio Elections,1995

palkawadri55@gmail.com: Aug 02 01:45PM -0700 The call letters to light TV is KCOP, not KTTV. Found that out real quick; especially, after watching a program on that channel a year ago.

Jon Elson <elson@pico-systems.com>: Aug 02 01:50PM -0500 On Tue, 31 Jul 2018 04:02:46 -0400, micky wrote:     > Could it be that the transmitter itself was sending out two copies of > the sound, one second apart?   > After about 10 minutes, it stopped and the sound was good again.   Well, a one second delay is not possible on the earth - the signal path would have to be about 500,000 miles.   What I think it could be is two stations running the same program material (LOTS of stations operate at least part of the day from common network feeds) and there was a slight delay between the feeds they were getting. (Most of this network stuff is now handled over the internet.) But, usually, stations relatively nearby do not operate on the same frequency.   One other possibility is that somebody at the station goofed and started TWO instances of the network streaming application, and they were getting slightly out-of-time buffers. I have done this many times when listening to material on the internet. The 10 minutes of this might be how long it took for a nearly listener to get through and report the problem. Or, the local manager only checks the broadcast every so many minutes to make sure they are still on the air.   Jon

Jon Elson <elson@pico-systems.com>: Aug 02 01:54PM -0500 On Tue, 31 Jul 2018 11:37:25 -0700, Dave Platt wrote:     > the Frederick/Hagerstown area. Westminster is just about equidistant > from Frederick and Baltimore. WYPF's transmitter is in the forest just > north of Frederick, while WYPR's is near Druid Hill Park is Baltimore.   Looks like you got it. MOST unusual to have the "sister station" on the SAME frequency as the main one. We have an NPR affiliate here with 4 sister stations. But, all of them are on different frequencies.   Jon

Jeff Liebermann <jeffl@cruzio.com>: Aug 02 12:24PM -0700 On Thu, 2 Aug 2018 04:15:18 -0700 (PDT), "pfjw@aol.com" > - and then I will pull over. And I will certainly NOT go through searching >for a number while driving.   >Come on!   I really didn't think it was necessary to lecture on how to safely place a call from inside an automobile. I rather assume that most drivers are familiar with the local laws concerning yacking while driving and understand that distracted driving is a really bad idea.   Out of all the points I made on analyzing possible causes for what had happened, you pick what I would consider a minor point or curiosity item at best. I do wish you wouldn't do that. However, since you want to switch topic from how FM modulation works to mobile phone etiquette, I'll play along, especially since you reinforced my point about nobody calling the station.   Only moving drivers, equidistant from both stations on 88.1MHz, would have heard the problem. Since these drivers are unlikely to call the station while moving, I consider it even less likely that they would have bothered to make the call after parking the car, because the problem would no longer be heard while stopped. They would probably suspect that the problem was "fixed" by the station and that it was no longer necessary to call the station.       -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

"pfjw@aol.com" <peterwieck33@gmail.com>: Aug 02 12:40PM -0700 Y'all are making this far too complicated and inventing explanations other than a simple sync issue within the station itself. Could be as simple as a tech replacing a piece of equipment and dropping a jumper into the wrong jack. 10 minutes later - after the phones started ringing off the hook - it got fixed.   Offered before.   a) Does not require any special equidistant spacing. b) Does not require a 90,000 mile bounce. c) Requires no coincidences. d) Explains what occurred. e) And is as likely as any other explanation. f) And you neatly sidestepped why a *driver* would not make such a call. g) While also ignoring the fact that the OP might simply not care about calling at all - and just asked a simple question.   Sheesh!   Peter Wieck Melrose Park, PA

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