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How's your hearing ?
UnsteadyKen wrote:
Michael A. Terrell wrote... 110 volts? The US went to 120 volts almost 50 years ago. Doh! My bad. Except in places where it is 115V or 117V. Or a local venue where it is nearly 128V. Windup radios, and ones that use D cells or lantern batteries are more common so they can get months or years use. Yes I'd forgotten about the windup radios being introduced. I'm stuck about 30 years in the past. And of course there are LED lanterns available now, which I believe are more efficient than filament bulbs. I've got a windup led torch myself. Windup radios are a great idea. When I was a kid in Thailand, there was a gadget you could buy that sat on top of a kerosene lantern and generated a few tens of mA at 3V from a thermocouple stack. It was enough to run a transistor radio with. The things were made in Russia and they couldn't have cost much.... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
How's your hearing ?
Scott Dorsey wrote:
Windup radios are a great idea. When I was a kid in Thailand, there was a gadget you could buy that sat on top of a kerosene lantern and generated a few tens of mA at 3V from a thermocouple stack. It was enough to run a transistor radio with. The things were made in Russia and they couldn't have cost much.... --scott You could make a similar gadget yourself using homebrew steel/copper wire thermocouples. |
How's your hearing ?
UnsteadyKen wrote: Michael A. Terrell wrote... 110 volts? The US went to 120 volts almost 50 years ago. Doh! My bad. Windup radios, and ones that use D cells or lantern batteries are more common so they can get months or years use. Yes I'd forgotten about the windup radios being introduced. I'm stuck about 30 years in the past. And of course there are LED lanterns available now, which I believe are more efficient than filament bulbs. I've got a windup led torch myself. I bought a machined aluminum flashlight the other day with 95 white LEDs. I bought it for my emergency kit. Being ex military, its hard to shake the habit of keeping a couple weeks of emergency rations, water and supplies on hand. That survival training in sub zero weather, and living on military rations that were twice your age leave a lasting impression. :) -- http://improve-usenet.org/index.html aioe.org, Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm There are two kinds of people on this earth: The crazy, and the insane. The first sign of insanity is denying that you're crazy. |
How's your hearing ?
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How's your hearing ?
Michael A. Terrell wrote:
Yawn You didn't even include large portions of the US. We aren't as stupid as you like to think. Tell me, How many people in third world countries know of any 9 volt batteries, let alone have a wide choice of types? How about China? Do they all know about more than one type? Everything the export to the US that uses a nine volt battery uses the one type. Sadly you will find that the Rio Grande-Canadian Border mentality is quite common in the USA. I think you'll find they make quite a few of them. And I should have got the East and West right - I've been to Maine, and Seattle. And no, I am not counting Hawaii or Alaska, only the lower 48. Again, this is common amongst your compatriots. I also think you'll find that most of these batteries are made by 3rd world countries now. And let me point out again - this is NOT just a US discussion. One of the groups is UK based, the others are international. Wow! You found a typo made by someone with severe vision problems. In fact, I only had the use of one bad eye for half of this year, and I still have problems with the other eye. No matter, you are another arrogant Brit so congratulations are in order for your amazing ability to sort fly **** from pepper. My apologies. Bad eyes don't show over the 'net. Oh, and I'm not British. Oh yes, my BM602s are better than my ears. You are into diminishing returns at £350 for speakers. Then you were a fool to spend the money. Really? What did I spend, and what should I have got for the same or less money? Andy |
How's your hearing ?
On Dec 24, 6:39*am, "Arie" wrote:
Don Pearce wrote in messagenews:4953186d.528987093@localhost... On Wed, 24 Dec 2008 11:07:26 -0000, "TonyL" wrote: geoff wrote: It is known as The Hum, and there are all sorts of conspiracy theories about it, from weapons research, government mind-control beams, aliens, phantom planets, the Sun getting ready to implode, electrical feilds, HARRP, gravity waves, etc, etc, etc. *Most adherents to those ideas radically HATE the idea of something as mundane as (LF) tinnitus. You obviously have you mind made up about whatever it was that you were hearing and that everyone who differs must be a raving nutcase. But.... I had The Hum for years when I lived near Wolverhampton. An LF pulsing sound that sounded like a large truck parked with its engine running. It started soon after a large gas main was installed nearby and I could "hear" it in and close to our house, especially at night. It sounded so real that I would wonder around the house looking for the source. Nobody else could hear it. I'm not sure it was tinnitus because I only ever heard it in/around the house. It was so location specific. I recall pulling up onto our drive after a completely hum-free holiday and turning off the car engine....immediately I could hear The Hum. Since we have been living in Wales for the last 9 years I have never heard it. I don't know what it is but I would not dismiss it out of hand as LF tinnitus. Ever try recording it? That would have settled the matter once and for all. And in that case - try recording it on a laptop, with a widely separated set of stereo mikes. Turn the set in different directions and look at the phase relation - should indicate direction. I found a "humming source" that way (transformer house with a resonating wall). I used a program to display the live stereo phase vector (AFAIR Cooledit 2000). Regards, Arie de Muijnck When I was a kid I noticed a wierd hum when I was near our refrigerator. Further exploration revealed that it was actually only when my ear rubbed against the refrigerator handle. Further investigation of this hum revealed that it was actually creating a very tiny electrical buzzing and stinging sensation at the point of contact with my ear. The refrigerator was grounded but by way of a considerable length of romex and apparently a small voltage was induced in the ground wire over the length. In essence, the run of romex was acting like a badly designed air core transformer and creating a low voltage induced potential on the ground. It was noticeable between a pipe ground and the refrigerator but only by using the sensitivity of a human ear. I'm sure I'm not the only very nearsighted person who has noticed that under certain accidental back lighting circumstances floaters on the surface of the eye closely resemble images you would see only under a low power microscope. Somehow science is more interesting in the ragged margins. |
How's your hearing ?
On Dec 31, 2:53*pm, "TonyL" wrote:
Scott Dorsey wrote: Windup radios are a great idea. *When I was a kid in Thailand, there was a gadget you could buy that sat on top of a kerosene lantern and generated a few tens of mA at 3V from a thermocouple stack. *It was enough to run a transistor radio with. *The things were made in Russia and they couldn't have cost much.... --scott You could make a similar gadget yourself using homebrew steel/copper wire thermocouples. Do you happen to know of any plans out there for hobbyist builders to build such a thing? I presume the cheap thermocouples would not drive a very loud speaker. How many such thermocouple junctions would it take to operate one of those $1 FM radios that run on a single 1.5V cell? (The batteries cost more than the radios.) |
How's your hearing ?
Andy Champ wrote: Michael A. Terrell wrote: Yawn You didn't even include large portions of the US. We aren't as stupid as you like to think. Tell me, How many people in third world countries know of any 9 volt batteries, let alone have a wide choice of types? How about China? Do they all know about more than one type? Everything the export to the US that uses a nine volt battery uses the one type. Sadly you will find that the Rio Grande-Canadian Border mentality is quite common in the USA. I think you'll find they make quite a few of them. And I should have got the East and West right - I've been to Maine, and Seattle. And no, I am not counting Hawaii or Alaska, only the lower 48. Again, this is common amongst your compatriots. You also ignored Florida. I also think you'll find that most of these batteries are made by 3rd world countries now. If you say so, but they don't make sense in today's world. Most of the oddball versions were obsolete here 50 years ago. A battery holder for 'AA', "C' or 'D' cells makes a lot more sense. Then everything can use the same types. What will no longer power a flashlight will power a radio for a while. Maximum use at minimum costs. And let me point out again - this is NOT just a US discussion. One of the groups is UK based, the others are international. Wow! You found a typo made by someone with severe vision problems. In fact, I only had the use of one bad eye for half of this year, and I still have problems with the other eye. No matter, you are another arrogant Brit so congratulations are in order for your amazing ability to sort fly **** from pepper. My apologies. Bad eyes don't show over the 'net. Oh, and I'm not British. Oh yes, my BM602s are better than my ears. You are into diminishing returns at £350 for speakers. Then you were a fool to spend the money. Really? What did I spend, and what should I have got for the same or less money? Anything that you think you might be able to tell that something better existed. :) -- http://improve-usenet.org/index.html aioe.org, Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm There are two kinds of people on this earth: The crazy, and the insane. The first sign of insanity is denying that you're crazy. |
How's your hearing ?
Greegor wrote: On Dec 31, 2:53 pm, "TonyL" wrote: Scott Dorsey wrote: Windup radios are a great idea. When I was a kid in Thailand, there was a gadget you could buy that sat on top of a kerosene lantern and generated a few tens of mA at 3V from a thermocouple stack. It was enough to run a transistor radio with. The things were made in Russia and they couldn't have cost much.... --scott You could make a similar gadget yourself using homebrew steel/copper wire thermocouples. Do you happen to know of any plans out there for hobbyist builders to build such a thing? I presume the cheap thermocouples would not drive a very loud speaker. How many such thermocouple junctions would it take to operate one of those $1 FM radios that run on a single 1.5V cell? (The batteries cost more than the radios.) Not if you solder in a 'D" cell. They are two for a dollar. -- http://improve-usenet.org/index.html aioe.org, Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm There are two kinds of people on this earth: The crazy, and the insane. The first sign of insanity is denying that you're crazy. |
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