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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Portable compressed air tank
Right,
I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. |
#2
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Portable compressed air tank
On 2016-03-22 21:46:56 +0000, Gareth Magennis said:
Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. Go to Harbor Freight. They list five. CP |
#3
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Portable compressed air tank
"MOP CAP" wrote in message news:20160322150453792-email@domaincom... I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Go to Harbor Freight. They list five. Just buy one of the small air compressors at HF for under $ 100. If your hose does not leak, you can keep the tank filled up for a while before you need to run the compressor part. If you want to , you can buy just the portabel tank and fill it anywhere there is an air supply, hopefully around 100 or so psi. |
#4
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Portable compressed air tank
"Ralph Mowery" wrote in message ... "MOP CAP" wrote in message news:20160322150453792-email@domaincom... I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Go to Harbor Freight. They list five. Just buy one of the small air compressors at HF for under $ 100. If your hose does not leak, you can keep the tank filled up for a while before you need to run the compressor part. If you want to , you can buy just the portabel tank and fill it anywhere there is an air supply, hopefully around 100 or so psi. Sorry, I forgot to include that I do not live in North America. I am in the UK. Cheers, Gareth. |
#5
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Portable compressed air tank
On 23/03/16 08:46, Gareth Magennis wrote:
I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). A standard type of water-based fire extinguisher can be pressurized using air through a nozzle the same as a tyre nozzle. That is, you can fill it yourself and pressurize at the local fuel station. They have a pressure gauge so you can tell whether your extinguisher is ready for use. I have a couple of these, and used one in a gas-flow experiment at 150PSI, no water. It will discharge through a 1mm nozzle for longer than 2 minutes. I have time/pressure graphs somewhere; that was the point of the experiment, we measured the speed of sound and calculated an approximation to absolute zero as a high-school experiment). If you change the standard water nozzle for one with a smaller diameter, and don't mind reaching down to the cylinder to discharge it, you'd need no other changes. My ones look like this: http://www.gumtree.com.au/s-ad/sebastopol/miscellaneous-goods/9l-water-fire-extinguisher-refillable-50-each/1086145027 Clifford Heath. |
#6
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Portable compressed air tank
"Ralph Mowery" wrote in message ... "MOP CAP" wrote in message news:20160322150453792-email@domaincom... I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Go to Harbor Freight. They list five. Just buy one of the small air compressors at HF for under $ 100. If your hose does not leak, you can keep the tank filled up for a while before you need to run the compressor part. If you want to , you can buy just the portabel tank and fill it anywhere there is an air supply, hopefully around 100 or so psi. I don't think you are getting my question. I would like something like a small Fire Extinguisher I can have near to my bench, not a big noisy compressor I have to store somewhere. Gareth. |
#7
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Portable compressed air tank
Per Gareth Magennis:
I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). Harbor Freight, as others have observed, is probably a good bet. But how small? If you want *really* small, start Googling "Paint Ball Guns". The paint ball people who do not use CO2 use compressed air and the tanks are quite small - yet hold something like 800 PSI. -- Pete Cresswell |
#8
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Portable compressed air tank
"Gareth Magennis" wrote in message ... I don't think you are getting my question. I would like something like a small Fire Extinguisher I can have near to my bench, not a big noisy compressor I have to store somewhere. No, we are not getting the question. Going by what you sent, the tank is about a foot in diameter and 2 feet long. Or 1/3 of a meter in diameter and a meter and a half long. The tanks are usually made to carry out on the road and blow up car tires. You now appear to want a tank about 3 or 4 inches in diameter and a foot long. You probably would not get enough air in it to do much at 100 psi or so that many of the stations supply. |
#9
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Portable compressed air tank
"Ralph Mowery" wrote in message ... "Gareth Magennis" wrote in message ... I don't think you are getting my question. I would like something like a small Fire Extinguisher I can have near to my bench, not a big noisy compressor I have to store somewhere. No, we are not getting the question. Going by what you sent, the tank is about a foot in diameter and 2 feet long. Or 1/3 of a meter in diameter and a meter and a half long. The tanks are usually made to carry out on the road and blow up car tires. You now appear to want a tank about 3 or 4 inches in diameter and a foot long. You probably would not get enough air in it to do much at 100 psi or so that many of the stations supply. I only want to blow the dust out of a power amplifier occasionally. I can buy a can of air do do that, but it is expensive. Surely there exists a small compressed air bottle that you can recharge at your local garage do do that same job. Gareth. |
#10
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Portable compressed air tank
On Tue, 22 Mar 2016 21:46:56 -0000, "Gareth Magennis"
wrote: Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. Greetings Gareth, Small tire, oops, tyre pumps will fill a small air tank. The problem is how long it takes and the duty cycle of the pump. Some will have an extended duty cycle and can be used without stopping for it to cool down. The problem with all the small pumps is that they need to run the tiny piston up and down very fast in order to fill a tire in any reasonable length of time. This makes them noisy because the little DC motor is spinning so fast. Oh crap, I just re-read your message and it seems you are asking if the local gas station air compressor will be powerful enough to fill your tank. Here in the USA most gas station air compressors will be able to fill a portable air tank, but some to maybe only to 80 PSI or so. Some of the gas stations have a stand alone air compressor for filling tyres off away from the gas, er, petrol pumps and they tend to have undersized compressors so filling your tank may take a while. But they will fill it. I imagine that in the UK there are similar things since ti, um ,tyres are the same the world over no matter how you spell the name. I know some folks here will also use old beer kegs to hold compressed air. They are made from pretty heavy wall stainless steel. I have an old keg that I use for just this reason. Recently I modified a keg, converting it into a still for a new local micro distillery. The keg had stamped on it that it would burst if pressurized over 60 PSI. After putting some holes in it for various pipes I was able to measure the wall thickness and it would take more, something around 350 PSI, to burst it. I think there must be a lot of folks stealing kegs to use as air tanks. Cheers, Eric |
#11
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Portable compressed air tank
Gareth Magennis wrote:
I only want to blow the dust out of a power amplifier occasionally. I can buy a can of air do do that, but it is expensive. ** You are labouring under a misconception. So called "air duster" is not air, but liquefied gas - normally a fluorocarbon. This allows a small can to hold a useful amount of gas, about 200 litres. A bottle of compressed air would be hold only a few percent of that amount with rapidly diminishing pressure as it is used - IOW almost useless. You need a continuous supply of compressed air for your tasks. The usual way to clean a fluff & dust clogged power amps is with a vacuum cleaner and a soft brush. A damp cloth gets most of what is left over. In cases of sticky contamination or carbon soot from a fire only disassembly and washing in warm water and detergent works. ..... Phil |
#12
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Portable compressed air tank
On 22/03/2016 21:46, Gareth Magennis wrote:
Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. I use a ,noisy, 1KW Martindale blower on dusty chassis, only the grease stays in place after a quick session with that, outdoors of course. |
#13
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Portable compressed air tank
I just looked up the specs on these, no wonder noisey, 381mph wind with
this 1.5HP version |
#14
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Portable compressed air tank
On Tuesday, March 22, 2016 at 5:47:07 PM UTC-4, Gareth Magennis wrote:
Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. First, keep a few things in mind. a) Charging a tire in the field is an entirely different concept than what you want. Air is subject to Boyle's Law, and the tank size you suggest would either require a dangerous amount of pressure in it, or not have enough to be useful for more than a minute or two - put another way, one minute less than necessary 100% of the time. b) Most "gas station thingys" do not have either filters or dryers on them. Meaning that the air you are getting will contain a good deal of moisture, which will also build up in the tank at each charge. If you use a commercial compressor, it will also discharge a certain amount of lubricant into the air. Neither moisture nor lubricants are any good for electronics. c) As Mr. Allison pointed out rightfully, "canned air" is actually a compressed liquid, usually 1,1,1,2-tetrafluoroethane, is neither air nor designed for your purpose. When a liquid changes phase to a gas, and when that gas is decompressed, it loses heat (gets cold, the principle of refrigeration). So, "Canned Air" comes on strong, and after a very short time slows down as the evaporation reduces due to temperature loss. With all that in mind, if you want to do what you suggest using compressed air, then invest in "doing it right". Obtain an inexpensive tank-mounted oil-less compressor *NAME BRAND* (I have a US-made reconditioned (by and from) Stanley). Obtain a Filter/Dryer (one of a great many is linked). Then, get a variety of fittings for different applications. My most useful is a flexible-wand device, very thin, that I can reach into very tight places and give moderate blasts of air. Mine fits behind/under the bench, and other than startling the cats when it runs, is practically invisible. I have linked a similar compressor to the one I have, but with a higher profile. The price is right, however. Now consider all the other things a good compressor will do for you. Spray paint, particle blasting, run nail guns or staplers, start DynaJet engines quickly and safely. I use mine to blow out the water pipes at our summer house before winter. Works like a charm. Fill tires, automotive or bicycle, pressurize pipes for testing purposes, testing miniature steam engines, and much more. And, you can purchase after-market rechargeable spray cans, of course. http://www.amazon.com/Compressed-des.../dp/B00UEUYHOG http://www.amazon.com/BOSTITCH-BTFP0.../dp/B00BF4VQ44 https://www.youtube.com/watch?v=9Gyq3OSwUN8 http://forum.12ozprophet.com/threads...le-can.137582/ Sorry for the rant, but what is desirable is not always practical, and what is practical is not always convenient. This is a nice example of that. After purchasing a compressor in anticipation of a major carpentry project - restoring our summer house after a flood - I am continuously surprised at the number of additional uses I find for it. The summer house is now raised by 8', no more floods. Peter Wieck Melrose Park, PA |
#15
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Portable compressed air tank
In article ,
"Gareth Magennis" wrote: Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...OW-GUN-PORTABL E-AIR-TANK-/281924138448?hash=item41a3fcf5d0:g:QPYAAOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Gareth- I can't find it now, but I have a small canister that may be what you are describing. It is slightly larger than a spray paint can, and holds a little less than a quart. The problem with it, is that it does not hold enough air to be practical. I think its main value would be for use as a liquid sprayer. Again, it does not hold enough air, and would need frequent re-charging! The canister has a valve assembly that unscrews from the tank, so you could fill the tank with a liquid you wanted to spray. It has a push-button valve on top, to spray the air or liquid. There is a fill valve like the one on an auto tire (tyre), as well as a pressure relief valve. I think it could easily be filled with a bicycle hand pump. A filling station air pump might have too high a pressure for the relief valve. I have had it for many years. I got it to use for things like blowing dust. However, I did not need to blow dust very often, so I eventually forgot about it! Fred |
#16
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Portable compressed air tank
On 3/22/2016 7:51 PM, (PeteCresswell) wrote:
If you want *really* small, start Googling "Paint Ball Guns". The paint ball people who do not use CO2 use compressed air and the tanks are quite small - yet hold something like 800 PSI. You aren't going to refill to 800 psi at the local garage! |
#17
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Portable compressed air tank
wrote in message ... On Tuesday, March 22, 2016 at 5:47:07 PM UTC-4, Gareth Magennis wrote: Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. First, keep a few things in mind. a) Charging a tire in the field is an entirely different concept than what you want. Air is subject to Boyle's Law, and the tank size you suggest would either require a dangerous amount of pressure in it, or not have enough to be useful for more than a minute or two - put another way, one minute less than necessary 100% of the time. b) Most "gas station thingys" do not have either filters or dryers on them. Meaning that the air you are getting will contain a good deal of moisture, which will also build up in the tank at each charge. If you use a commercial compressor, it will also discharge a certain amount of lubricant into the air. Neither moisture nor lubricants are any good for electronics. c) As Mr. Allison pointed out rightfully, "canned air" is actually a compressed liquid, usually 1,1,1,2-tetrafluoroethane, is neither air nor designed for your purpose. When a liquid changes phase to a gas, and when that gas is decompressed, it loses heat (gets cold, the principle of refrigeration). So, "Canned Air" comes on strong, and after a very short time slows down as the evaporation reduces due to temperature loss. With all that in mind, if you want to do what you suggest using compressed air, then invest in "doing it right". Obtain an inexpensive tank-mounted oil-less compressor *NAME BRAND* (I have a US-made reconditioned (by and from) Stanley). Obtain a Filter/Dryer (one of a great many is linked). Then, get a variety of fittings for different applications. My most useful is a flexible-wand device, very thin, that I can reach into very tight places and give moderate blasts of air. Mine fits behind/under the bench, and other than startling the cats when it runs, is practically invisible. I have linked a similar compressor to the one I have, but with a higher profile. The price is right, however. Now consider all the other things a good compressor will do for you. Spray paint, particle blasting, run nail guns or staplers, start DynaJet engines quickly and safely. I use mine to blow out the water pipes at our summer house before winter. Works like a charm. Fill tires, automotive or bicycle, pressurize pipes for testing purposes, testing miniature steam engines, and much more. And, you can purchase after-market rechargeable spray cans, of course. http://www.amazon.com/Compressed-des.../dp/B00UEUYHOG http://www.amazon.com/BOSTITCH-BTFP0.../dp/B00BF4VQ44 https://www.youtube.com/watch?v=9Gyq3OSwUN8 http://forum.12ozprophet.com/threads...le-can.137582/ Sorry for the rant, but what is desirable is not always practical, and what is practical is not always convenient. This is a nice example of that. After purchasing a compressor in anticipation of a major carpentry project - restoring our summer house after a flood - I am continuously surprised at the number of additional uses I find for it. The summer house is now raised by 8', no more floods. Peter Wieck Melrose Park, PA That might be your experience, I just want to blow the dust off heatsinks every now and again. I don't have a Summer House. Gareth. |
#18
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Portable compressed air tank
On Wednesday, March 23, 2016 at 8:01:33 PM UTC-4, Gareth Magennis wrote:
wrote in message ... On Tuesday, March 22, 2016 at 5:47:07 PM UTC-4, Gareth Magennis wrote: Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. First, keep a few things in mind. a) Charging a tire in the field is an entirely different concept than what you want. Air is subject to Boyle's Law, and the tank size you suggest would either require a dangerous amount of pressure in it, or not have enough to be useful for more than a minute or two - put another way, one minute less than necessary 100% of the time. b) Most "gas station thingys" do not have either filters or dryers on them. Meaning that the air you are getting will contain a good deal of moisture, which will also build up in the tank at each charge. If you use a commercial compressor, it will also discharge a certain amount of lubricant into the air. Neither moisture nor lubricants are any good for electronics. c) As Mr. Allison pointed out rightfully, "canned air" is actually a compressed liquid, usually 1,1,1,2-tetrafluoroethane, is neither air nor designed for your purpose. When a liquid changes phase to a gas, and when that gas is decompressed, it loses heat (gets cold, the principle of refrigeration). So, "Canned Air" comes on strong, and after a very short time slows down as the evaporation reduces due to temperature loss. With all that in mind, if you want to do what you suggest using compressed air, then invest in "doing it right". Obtain an inexpensive tank-mounted oil-less compressor *NAME BRAND* (I have a US-made reconditioned (by and from) Stanley). Obtain a Filter/Dryer (one of a great many is linked). Then, get a variety of fittings for different applications. My most useful is a flexible-wand device, very thin, that I can reach into very tight places and give moderate blasts of air. Mine fits behind/under the bench, and other than startling the cats when it runs, is practically invisible. I have linked a similar compressor to the one I have, but with a higher profile. The price is right, however. Now consider all the other things a good compressor will do for you. Spray paint, particle blasting, run nail guns or staplers, start DynaJet engines quickly and safely. I use mine to blow out the water pipes at our summer house before winter. Works like a charm. Fill tires, automotive or bicycle, pressurize pipes for testing purposes, testing miniature steam engines, and much more. And, you can purchase after-market rechargeable spray cans, of course. http://www.amazon.com/Compressed-des.../dp/B00UEUYHOG http://www.amazon.com/BOSTITCH-BTFP0.../dp/B00BF4VQ44 https://www.youtube.com/watch?v=9Gyq3OSwUN8 http://forum.12ozprophet.com/threads...le-can.137582/ Sorry for the rant, but what is desirable is not always practical, and what is practical is not always convenient. This is a nice example of that. After purchasing a compressor in anticipation of a major carpentry project - restoring our summer house after a flood - I am continuously surprised at the number of additional uses I find for it. The summer house is now raised by 8', no more floods. Peter Wieck Melrose Park, PA That might be your experience, I just want to blow the dust off heatsinks every now and again. I don't have a Summer House. Gareth. Dust + nicotine/kitchen grease/smoke/creosote = nothing what you describe could handle. Point being, as stated, what is desired is not practical, what is practical may not be convenient. FULL STOP. Peter Wieck Melrose Park, PA |
#19
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Portable compressed air tank
On Tuesday, March 22, 2016 at 4:47:07 PM UTC-5, Gareth Magennis wrote:
Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. All you need is an old refrigerant (freon) tank and a REFRIGERANT TANK CONVERSION KIT. I bought one of these years ago, and a friend gave me an empty freon tank. It consists of an adapter, valve, pressure gauge, and hose. You can fill it with any compressor and take it with you. I wouldn't fill mine more than about 150psi, but it worked great until I dropped something on it and broke the valve. I just found a kit on Ebay: http://www.ebay.com/itm/REFRIGERANT-...-/251278903428 And a photo of a typical tank, which can usually be gotten for free if you ask an A/C man: http://ecx.images-amazon.com/images/I/41IwvEpnrhL.jpg |
#20
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Portable compressed air tank
Unless I'm misunderstanding, what you want is widely available.
I lived in Germany for 5 years. I work for the US Army and where they send me I say yes sir. In Germany you don't drag a hose to your car tires. Instead, you lift a small bottle off the compressor quick disconnect and walk to each tire. The bottle usually holds enough to pump up each tire. If you are unusually low you might have to set the bottle back on the compressor until it refills. Google Airquick or go he http://ewo-stuttgart.com/garage-equi...yre-inflators/ |
#21
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Portable compressed air tank
wrote in message ... On Wednesday, March 23, 2016 at 8:01:33 PM UTC-4, Gareth Magennis wrote: wrote in message ... On Tuesday, March 22, 2016 at 5:47:07 PM UTC-4, Gareth Magennis wrote: Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). I would also like it to include one of these, to blow all the dust from the heatsinks and chassis in Power Amplifiers, amongst other things. http://www.ebay.co.uk/itm/VINTAGE-19...AOSwpzdWrsU q Does such a thing exist? Are retail tyre pumps powerful enough to charge these? I've been Googling but don't know the connector terminology that says "you can charge this with your local tyre pump". I've found lots of portable air tanks aimed at Motorsports, but I'm really not sure about the local tyre pump mechanism thingy to charge it. Cheers, Gareth. First, keep a few things in mind. a) Charging a tire in the field is an entirely different concept than what you want. Air is subject to Boyle's Law, and the tank size you suggest would either require a dangerous amount of pressure in it, or not have enough to be useful for more than a minute or two - put another way, one minute less than necessary 100% of the time. b) Most "gas station thingys" do not have either filters or dryers on them. Meaning that the air you are getting will contain a good deal of moisture, which will also build up in the tank at each charge. If you use a commercial compressor, it will also discharge a certain amount of lubricant into the air. Neither moisture nor lubricants are any good for electronics. c) As Mr. Allison pointed out rightfully, "canned air" is actually a compressed liquid, usually 1,1,1,2-tetrafluoroethane, is neither air nor designed for your purpose. When a liquid changes phase to a gas, and when that gas is decompressed, it loses heat (gets cold, the principle of refrigeration). So, "Canned Air" comes on strong, and after a very short time slows down as the evaporation reduces due to temperature loss. With all that in mind, if you want to do what you suggest using compressed air, then invest in "doing it right". Obtain an inexpensive tank-mounted oil-less compressor *NAME BRAND* (I have a US-made reconditioned (by and from) Stanley). Obtain a Filter/Dryer (one of a great many is linked). Then, get a variety of fittings for different applications. My most useful is a flexible-wand device, very thin, that I can reach into very tight places and give moderate blasts of air. Mine fits behind/under the bench, and other than startling the cats when it runs, is practically invisible. I have linked a similar compressor to the one I have, but with a higher profile. The price is right, however. Now consider all the other things a good compressor will do for you. Spray paint, particle blasting, run nail guns or staplers, start DynaJet engines quickly and safely. I use mine to blow out the water pipes at our summer house before winter. Works like a charm. Fill tires, automotive or bicycle, pressurize pipes for testing purposes, testing miniature steam engines, and much more. And, you can purchase after-market rechargeable spray cans, of course. http://www.amazon.com/Compressed-des.../dp/B00UEUYHOG http://www.amazon.com/BOSTITCH-BTFP0.../dp/B00BF4VQ44 https://www.youtube.com/watch?v=9Gyq3OSwUN8 http://forum.12ozprophet.com/threads...le-can.137582/ Sorry for the rant, but what is desirable is not always practical, and what is practical is not always convenient. This is a nice example of that. After purchasing a compressor in anticipation of a major carpentry project - restoring our summer house after a flood - I am continuously surprised at the number of additional uses I find for it. The summer house is now raised by 8', no more floods. Peter Wieck Melrose Park, PA That might be your experience, I just want to blow the dust off heatsinks every now and again. I don't have a Summer House. Gareth. Dust + nicotine/kitchen grease/smoke/creosote = nothing what you describe could handle. Point being, as stated, what is desired is not practical, what is practical may not be convenient. FULL STOP. Peter Wieck Melrose Park, PA Peter I really don't think you get this at all. I only want to blow dust off a heatsink. I can actually do this myself by taking a big breath and blowing hard. But I really don't want to do that, and I don't want a large compressor plus tank I have to store somewhere to do this for me. I'd have bought one years ago if I had wanted to do so, I have been well aware of these things for years. Inventing reasons I need something else to shift nicotene, grease, smoke etc is not helpful. Full Stop. By the way, I have an emergency tyre in the boot of my car, that claims it is charged to 60psi. I bet I could fit an attachment to this to provide short bursts of air that would be far more effective than anything I can do by blowing hard, and it has the right attachment for blowing up at any local garage. http://www.puretyre.co.uk/tyre-infor...ce-saver-tyre/ I just need a smaller tank to do the same job. Gareth. |
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Portable compressed air tank
On Tue, 29 Mar 2016 00:34:20 +0100, "Gareth Magennis"
wrote: snip I only want to blow dust off a heatsink. I can actually do this myself by taking a big breath and blowing hard. I've done that for someone on an overheating PC but using a thin tube to better direct the air and get my face out of the way. ;-) But I really don't want to do that, and I don't want a large compressor plus tank I have to store somewhere to do this for me. I've not read the entire thread but I have a very portable and 'adequate' instant / oil-free, non reservoir compressor I regularly use for blowing out PC heatsinks and cases and have done so for many years now (to good effect). http://nbwelly.en.made-in-china.com/...hout-Tank.html http://tinyurl.com/hn3xonj My mate (who owns his own PC repair shop) has the exact same and has been using his for a similar period. The only thing against them, you do need power and they are pretty noisy (but aren't generally running for long). Personally, I leave mine just inside an external door, just close the door on the hose and blow the item clean outside (so not so noisy). snip By the way, I have an emergency tyre in the boot of my car, that claims it is charged to 60psi. I bet I could fit an attachment to this to provide short bursts of air that would be far more effective than anything I can do by blowing hard, and it has the right attachment for blowing up at any local garage. http://www.puretyre.co.uk/tyre-infor...ce-saver-tyre/ I just need a smaller tank to do the same job. As I believe has already been mentioned, you don't get a lot of 'compressed air' when you aren't compressing it to very high pressures so you may be stuck with something that is still reasonably bulky. A spare wheel may well be good enough and as you say, already has the right connections, at least for inflation. ;-) I bought one of these to do exactly the sort of thing you were talking of: http://www.toolstation.com/shop/Powe...eceiver/p19659 http://tinyurl.com/zjonb68 I have to admit I've not used it yet but I hope to soon, both to expand the capacity of my small silent workshop compressor (Bambi) and to have something in the indoor workshop for the odd small blowing out job (that I can re-charge myself down the workshop on the other compressor). Cheers, T i m |
#23
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Portable compressed air tank
"T i m" wrote in message ... On Tue, 29 Mar 2016 00:34:20 +0100, "Gareth Magennis" wrote: snip I only want to blow dust off a heatsink. I can actually do this myself by taking a big breath and blowing hard. I've done that for someone on an overheating PC but using a thin tube to better direct the air and get my face out of the way. ;-) But I really don't want to do that, and I don't want a large compressor plus tank I have to store somewhere to do this for me. I've not read the entire thread but I have a very portable and 'adequate' instant / oil-free, non reservoir compressor I regularly use for blowing out PC heatsinks and cases and have done so for many years now (to good effect). http://nbwelly.en.made-in-china.com/...hout-Tank.html http://tinyurl.com/hn3xonj My mate (who owns his own PC repair shop) has the exact same and has been using his for a similar period. The only thing against them, you do need power and they are pretty noisy (but aren't generally running for long). Personally, I leave mine just inside an external door, just close the door on the hose and blow the item clean outside (so not so noisy). snip By the way, I have an emergency tyre in the boot of my car, that claims it is charged to 60psi. I bet I could fit an attachment to this to provide short bursts of air that would be far more effective than anything I can do by blowing hard, and it has the right attachment for blowing up at any local garage. http://www.puretyre.co.uk/tyre-infor...ce-saver-tyre/ I just need a smaller tank to do the same job. As I believe has already been mentioned, you don't get a lot of 'compressed air' when you aren't compressing it to very high pressures so you may be stuck with something that is still reasonably bulky. A spare wheel may well be good enough and as you say, already has the right connections, at least for inflation. ;-) I bought one of these to do exactly the sort of thing you were talking of: http://www.toolstation.com/shop/Powe...eceiver/p19659 http://tinyurl.com/zjonb68 I have to admit I've not used it yet but I hope to soon, both to expand the capacity of my small silent workshop compressor (Bambi) and to have something in the indoor workshop for the odd small blowing out job (that I can re-charge myself down the workshop on the other compressor). Cheers, T i m Thanks, Tim. I was a little bit hasty in suggesting a 60 psi spare tyre might be a solution. I tried it earlier to realise the valve is just designed for slow filling, and has a very restricted airflow when deflating. (Which I knew already but just plain forgot) Point is, it doesn't take an awful lot of air to blow dust off a heatsink. I usually brush off what I can before resorting to using my lungs and blowing off the remaining inaccessible stuff. Trouble is this always ends up with some in my lungs and nasal passages. Cheers, Gareth. |
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On Tuesday, March 29, 2016 at 5:35:00 PM UTC-4, Gareth Magennis wrote:
I was a little bit hasty in suggesting a 60 psi spare tyre might be a solution. I tried it earlier to realise the valve is just designed for slow filling, and has a very restricted airflow when deflating. (Which I knew already but just plain forgot) Point is, it doesn't take an awful lot of air to blow dust off a heatsink.. I usually brush off what I can before resorting to using my lungs and blowing off the remaining inaccessible stuff. Trouble is this always ends up with some in my lungs and nasal passages. I dunno - VW for years drove their window washing system from the spare tire (anyone else remember those days?). It was always a memory contest to make sure to refill the tire, or be stranded by the side of the road as the air lines often leaked. Tires were not-so-good in those days as well. If all you need is that one lungful, consider a small portable tankless compressor ($15 at your nearest auto-supply) and a refillable aerosol can. No more than 100psi in most cases, but it would do what you lungs can do. For that matter, you could fill such a can from the tire, a double-schraeder fill fitting is cheap enough to fabricate. Betcha if you do this, you _will_ wish for more... Peter Wieck Melrose Park, PA |
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On Wednesday, March 30, 2016 at 1:35:34 PM UTC-4, wrote:
If all you need is that one lungful, consider a small portable tankless compressor ($15 at your nearest auto-supply) and a refillable aerosol can. Do they make those? I could fill it from a bicycle pump. |
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On Wednesday, March 30, 2016 at 1:52:14 PM UTC-4, Tim R wrote:
On Wednesday, March 30, 2016 at 1:35:34 PM UTC-4, wrote: If all you need is that one lungful, consider a small portable tankless compressor ($15 at your nearest auto-supply) and a refillable aerosol can. Do they make those? I could fill it from a bicycle pump. http://ecx.images-amazon.com/images/I/41atX8vvK3L.jpg They sure do. Not much use for high volumes or high pressures, but portable and not overly expensive. The one linked is about US$18 or so. You will note that the one linked also states that it is NOT to be used as a duster. Further research will tell you that this is because there is a tendency to vastly over-pressurize if used for this purpose. Go up in price, and you can get one rated for air only. http://www.amazon.com/Aluminum-Pneum...A596F3ND47C2BK Peter Wieck Melrose Park, PA |
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Portable compressed air tank
Way back when, maybe 40+ years ago, I was a kid and there was a CO2 tank in the junkyard. Big and heavy. You won't find tanks in the junkyard anymore because of regulations.
I pump it up to about 160 PSI with a male to male coupler. I also have a valve to safely vent it before disconnecting. My "compressor" has a small tank and is stationary. I can fill the tank and adjust the air in the car tires, but it doesn't last long. A compressor (reed based) used for an airbrush would work for your application. |
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wrote in message ... On Tuesday, March 29, 2016 at 5:35:00 PM UTC-4, Gareth Magennis wrote: I was a little bit hasty in suggesting a 60 psi spare tyre might be a solution. I tried it earlier to realise the valve is just designed for slow filling, and has a very restricted airflow when deflating. (Which I knew already but just plain forgot) Point is, it doesn't take an awful lot of air to blow dust off a heatsink. I usually brush off what I can before resorting to using my lungs and blowing off the remaining inaccessible stuff. Trouble is this always ends up with some in my lungs and nasal passages. I dunno - VW for years drove their window washing system from the spare tire (anyone else remember those days?). It was always a memory contest to make sure to refill the tire, or be stranded by the side of the road as the air lines often leaked. Tires were not-so-good in those days as well. If all you need is that one lungful, consider a small portable tankless compressor ($15 at your nearest auto-supply) and a refillable aerosol can. No more than 100psi in most cases, but it would do what you lungs can do. For that matter, you could fill such a can from the tire, a double-schraeder fill fitting is cheap enough to fabricate. Betcha if you do this, you _will_ wish for more... Peter Wieck Melrose Park, PA Yes, no doubt I will. I took 4 Power Amplifiers round to the nearby garage today to blow out using their airline - we are more friends than business accomplices, and they will happily let me do that for free. But I have to load the amps in my car and drive it round there. And yes, it's great to have a huge tank and massive pressure if you have the space to keep it in. Worked a treat, so it did. I discussed this subject with them, and they pretty much said the same thing - No, you need big pressure, you need big tank, small tank empties quickly. (They are Russian) Also, big tank with high pressure, if explodes, you damage your building. Big problem, very dangerous. My workshop is actually now in a Music Shop. A big tank exploding in there is not even worth thinking about. A noisy compressor is not ideal either, and I don't have the space to store it anyway, being as Retail Space in a city centre is rather expensive. Gareth. |
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I bought this after someone posted a link on this thread:
http://www.amazon.co.uk/FIT-TOOLS-Al...1_TE_3p_ dp_1 As it's aluminium (not aluminum) it should stand up to the water content of compressed air sources. I doubt very much it will blow out a Power Amp on it's own, but I have plenty other uses for an air duster I don't have to keep buying in can form, and it might just mean I don't have to always cart a big heavy amp to my local garage to use their mighty airline, as much fun as it is. Gareth. |
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Phil Allison wrote: "Gareth Magennis wrote:
I only want to blow the dust out of a power amplifier occasionally. I can buy a can of air do do that, but it is expensive. ** You are labouring under a misconception. So called "air duster" is not air, but liquefied gas - normally a fluorocarbon. This allows a small can to hold a useful amount of gas, about 200 litres. A bottle of compressed air would be hold only a few percent of that amount with rapidly diminishing pressure as it is used - IOW almost useless. You need a continuous supply of compressed air for your tasks. The usual way to clean a fluff & dust clogged power amps is with a vacuum cleaner and a soft brush. A damp cloth gets most of what is left over. In cases of sticky contamination or carbon soot from a fire only disassembly and washing in warm water and detergent works. ..... Phil " And I have seen places like Staples charge up to US$11(!!) per can for em, ostensibly to price them out of the range of local teenagers who love to inhale from them in their spare time (which could be used doing homework, shoveling snow or mowing neighbors lawns, soup kitchens, being active church, or school athletics or 1,000 other useful things). ! |
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G-Mac:
I bought mine at the local NAPA. Red, about 22"L by 11" high, holds max. 125PSI, enough for replacing air in our cars during fall & winter when they lose pressure to cold temps. The garage renting the space to one side lets me fill it 1-2x per year, and their machine dutifully gets it up to 110-115lbs PSI. (that last 10psi takes the longest, naturally!). Most gas station courtesy hoses around here cannot put more than 80psi into it, so they remain as backup sources. Someday I will stop this tank nonsense and just buy a small electric compressor. |
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wrote:
And I have seen places like Staples charge up to US$11(!!) per can for em, ostensibly to price them out of the range of local teenagers who love to inhale from them in their spare time ** A 400mL "duster" costs almost A$30 from my local parts supplier. The store next door will sell you 700mL of Jim Beam for A$39. ..... Phil |
#33
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Gareth Magennis wrote:
I doubt very much it will blow out a Power Amp on it's own, but I have plenty other uses for an air duster I don't have to keep buying in can form, and it might just mean I don't have to always cart a big heavy amp to my local garage to use their mighty airline, as much fun as it is. ** A small scuba diving tank would do the job, you can get 3L ones. They hold air pressures up to 3000psi or about 200 atmospheres - so you get 600L of air. Only problem is recharging one. ..... Phil |
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On Fri, 1 Apr 2016 04:13:00 -0700 (PDT) Phil Allison
wrote in Message id: : Gareth Magennis wrote: I doubt very much it will blow out a Power Amp on it's own, but I have plenty other uses for an air duster I don't have to keep buying in can form, and it might just mean I don't have to always cart a big heavy amp to my local garage to use their mighty airline, as much fun as it is. ** A small scuba diving tank would do the job, you can get 3L ones. They hold air pressures up to 3000psi or about 200 atmospheres - so you get 600L of air. Only problem is recharging one. Welding supply house should be able to do that. http://igoswelding.com/gases/3609608 This place lists UHP Air |
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Portable compressed air tank
"Phil Allison" wrote in message ... Gareth Magennis wrote: I doubt very much it will blow out a Power Amp on it's own, but I have plenty other uses for an air duster I don't have to keep buying in can form, and it might just mean I don't have to always cart a big heavy amp to my local garage to use their mighty airline, as much fun as it is. ** A small scuba diving tank would do the job, you can get 3L ones. They hold air pressures up to 3000psi or about 200 atmospheres - so you get 600L of air. Only problem is recharging one. ..... Phil Been Googling a bit, and it seems PCP Air Rifles commonly utilise Scuba tanks, and you can actually get hand pumps that will provide up to 250 bar. If you are young and fit enough. http://www.airgunbuyer.com/Showprodu...SubCat=pump s Gareth. |
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Been Googling a bit, and it seems PCP Air Rifles commonly utilise Scuba tanks, and you can actually get hand pumps that will provide up to 250 bar. If you are young and fit enough. http://www.airgunbuyer.com/Showprodu...SubCat=pump s And here's a small tank. http://www.stealthunter.co.uk/mini-c...nit-1269-p.asp Quite an expensive way to get compressed air, though! Gareth. |
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"Gareth Magennis" writes:
Right, I would really like a very small, cheap, air tank that I can charge every now and again at the local garage (i.e. can be filled with a standard car tyre pump). Harbor Freight sells small pancake compressor+tank setups. Item # 60637, Item # 95275 When on sale, it can be ~$40, as I recall. When it runs out of air, you add some electricity and make more. -- A host is a host from coast to & no one will talk to a host that's close.......................... Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
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