- Weller magnastat soldering iron problem - 2 Updates
- Class 1 laser safe, output power and accidents - 2 Updates
- Two rsignals at same time, 88.1 where - 6 Updates
- Is Class 1 laser safe enough for baby eyes? - 3 Updates
- Still need these tubes for my drug store tube tester - 2 Updates
N_Cook <diverse@tcp.co.uk>: Jul 31 02:26PM +0100 Intermittant failure to heat. Not due to failing switch, but original plastic stress-relief sheathing at the blue body gone hard with age and causing stress to cable and then a conductor break. Makes you wonder where all that plasticiser migrates to, presumably us , quite a bit. |
Terry Schwartz <tschw10117@aol.com>: Jul 31 08:34AM -0700 On Tuesday, July 31, 2018 at 8:26:55 AM UTC-5, N_Cook wrote: > at the blue body gone hard with age and causing stress to cable and then > a conductor break. Makes you wonder where all that plasticiser migrates > to, presumably us , quite a bit. It outgasses..... to atmosphere. Just like the buildup of haze on the inside of your windshield after a hot summer. That's your dashboard, vinyl, carpeting, wire insulation, powder coated parts, upholstery, foam, virtually everything in your car's interior except the metal itself, condensing on the glass and every other surface. Good reason to keep the air flowing thru the vehicle as you drive, minimize the inhalation of those compounds. Gotta love that new car smell. |
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Jul 31 09:18PM +0800 On 7/31/2018 8:13 PM, Paul wrote: > however, an unsafe power level may be collected by a > magnifying optic with larger aperture." So all we need is an "accident" to hurt some babies' eyes? Which will force them to see eye doctors and pay some treatment? Or maybe buying a few pair glasses? Oh well, I agree, it'll be good business. :) -- @~@ 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 |
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Jul 31 10:51PM +0800 On 7/31/2018 10:40 PM, Paul wrote: > And what treatment is there for a retinal burn ? > I don't think there is any treatment, except for the > doctor to say he can't help you. Stem cells? :) Would retina of some very old persons be more vulnerable to Class 1 laser burn? OK, I know Class 1 is supposed to 100% safe. But ... you know there may be exceptions. :) -- @~@ 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 |
micky <NONONOmisc07@bigfoot.com>: Jul 31 04:02AM -0400 Satruday, july 28, at 10:50AM I was driving through Westminster Md, listening to 88.1 FM, Baltimore,and I was getting two copies of the same sounds, one a second or so delayed compared to the other. This went on for at least 5 miles, at least 10 minutes. It was nearly impossible to tell what was being said. How could this happen? It's a rural area with no very tall buildings and even if there were a reflection, it would not reflect at me everywhere along a 5 mile line. I've been there many times before, usually listening to the same station, and it never happened before. So I don't think there is a second station on the same frequency in radio range. 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. |
bruce2bowser@gmail.com: Jul 31 03:14AM -0700 On Tuesday, July 31, 2018 at 4:02:55 AM UTC-4, micky wrote: > This went on for at least 5 miles, at least 10 minutes. > It was nearly impossible to tell what was being said. > How could this happen? Have you thought of calling and telling that radio station? |
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jul 31 07:48AM -0400 On 07/31/2018 04:02 AM, 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, to be multipath the echo would have to be coming from 150,000 km away, so that isn't too likely. ;) Maybe a repeater that got out of sync? Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net |
Terry Schwartz <tschw10117@aol.com>: Jul 31 06:12AM -0700 On Tuesday, July 31, 2018 at 3:02:55 AM UTC-5, 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. We have a local AM radio station that on a daily basis, I can hear two or more commercials playing on top of each other. Typically gets corrected before the programming starts again. I think I'm hearing a locally fed commercial and a network based spot at the same time. Sometimes both over traffic or weather... Just poor production. |
Bob F <bobnospam@gmail.com>: Jul 31 07:12AM -0700 On 7/31/2018 1:02 AM, 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. Very likely an out of sync repeater. It looks like they have 2 repeaters. http://www.wypr.org/your-public-radio-fcc-public-file |
Jeff Liebermann <jeffl@cruzio.com>: Jul 31 07:50AM -0700 >Very likely an out of sync repeater. It looks like they have 2 repeaters. >http://www.wypr.org/your-public-radio-fcc-public-file Agreed, but WYPR only simulcasts with one station on 88.1MHz (WYPF): <https://en.wikipedia.org/wiki/WYPR> The station broadcasts on 88.1 MHz on the FM band. Its studio is in the Charles Village neighborhood of northern Baltimore, while its transmitter is in Park Heights. The station is simulcast in the Frederick and Hagerstown area on WYPF (88.1 FM) and in the Ocean City area on WYPO (106.9 FM). For a generic FM broadcast receiver, capture effect requires that one signal is 2dB more than the other in order to get a 30dB of reduction in "noise" from the weaker station. If the two signals are roughly equal at the receiver, then you'll get no isolation and hear both stations. Since KYPR and WYPF are both on 88.1 and fairly close to each other, my guess(tm) is that their transmit frequencies are both phase locked to some common reference, and that their audio feeds are adjusted for identical delays. In other words, they're setup for simulcast. However, that's a guess(tm) because I'm in a rush and don't have time to read exactly what they're doing. -- 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 |
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Jul 31 09:03PM +0800 On 7/31/2018 8:13 PM, Paul wrote: > however, an unsafe power level may be collected by a > magnifying optic with larger aperture." > Looks like that baby is safe. Nothing to worry about. There are counters with handheld laser scanner. And those handheld scanners are NOT placed carefully to avoid customers, at least I saw that in Hong Kong. Did they do it deliberately? Is it a secret laser experiment? Well... :) -- @~@ 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 |
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jul 31 10:09AM -0400 On 07/31/2018 09:03 AM, Mr. Man-wai Chang wrote: > scanners are NOT placed carefully to avoid customers, at least I saw > that in Hong Kong. > Did they do it deliberately? Is it a secret laser experiment? Well... :) That beam is moving so fast that the dwell time on the retina is really, really short--probably tens of microseconds. That helps a lot. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com |
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Jul 31 10:27PM +0800 On 7/31/2018 10:09 PM, Phil Hobbs wrote: > That beam is moving so fast that the dwell time on the retina is really, > really short--probably tens of microseconds. That helps a lot. And you are not wearing those handheld laser scanners like a VR glass/helmet ...oh well... Um.... Is there safety classification for VR glasses/helmets? :) -- @~@ 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 |
Terry Schwartz <tschw10117@aol.com>: Jul 30 07:11PM -0700 Late era TV tubes. I pay shipping + nominal pricing. Must be in original boxes. Terry 3DZ4 medium mu triode 6BK7/6BQ7 twin triode uhf preamp 6BS8 dual triode 6DS4 triode rf amp 6EV5 sharp cutoff tetrode vhf amp 6GK6 beam power pentode audio/video amp 6KD8 triode pentode vhf osc mixer 10JV8 10JY8 triode pentode sync vid amp 12AE6 double diode triode det amp car radio 12AF6 pentode amp car radio 12DS7 duplex diode tetrode auto radio 12K5 tetrode auto radio pwr amp 15CW5 pentode af amp 36AM3 1/2 wave rectifier 2AS2 hv rect 6AF11 double triode pentode agc sync video amp 6AL11 beam power pentode fm det & audio 6AR11 twin pentode if amp 6AX3 damper diode 6EW7 double triode v osc v amp 6HE5 pentode v amp 6Q11/6K11 triple triode sync clipper & agc 12AY3 1/2 wave rect damper 5U4/5V3 full wave rect 6BY5 double diode damper, rect 6DQ6 beam pentode h defl amp 6GT5 beam pentode h defl amp 6GW6 beam pentode h defl amp 6JE6 beam pentode h defl amp 21HJ5 beam pentode h defl amp 25CD6/25DN6 beam pentode h defl amp |
bruce2bowser@gmail.com: Jul 31 03:15AM -0700 On Monday, July 30, 2018 at 10:11:33 PM UTC-4, Terry Schwartz wrote: > 6JE6 beam pentode h defl amp > 21HJ5 beam pentode h defl amp > 25CD6/25DN6 beam pentode h defl amp Aren't drug store pyrex glass tubes used for smoking rock cocaine? |
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