Vacuum Tubes

What kind of vacuum tubes are these? What can they be used for, etc? I found them from an 80's TV.

Topic by tinstructable   |  last reply


Vacuum Maker? Answered

For my sleeping pad. It's a thin, around one inch one. I would like to have something to just suck out all the air when I'm done.

Question by Batryn   |  last reply


Vacuum pump

Hi fellow iblershas anyone ever made a vacuum pump for a vacuum chamber out of an aquarium air pump before? Does it pull a good enough vacuum if you modify it? please respond someone. Thanks

Question by Disasterific   |  last reply


small vacuum pump

Where can i purchase a replacement vacuum pump for a rival vacuum sealer vs230

Topic by derricklaw   |  last reply


Vacuum Forming Vinyl?

I am a student looking for some colored vinyl/plastic sheets to vacuum form bones. I need black and red and was wondering where a good place to order from and what exactly I should order. 

Question by shoeluvr95   |  last reply


Dyson vacuum parts

Our Dyson vacuum finally broke after 10 yrs but the motor still works well. I've been thinking of using the motor and canister as the base for a shop vac. Has anyone had any experience working with Dyson parts? Any suggestions would be great. Thanks.

Topic by sage729   |  last reply


vacuum tube television Answered

ive got an old working color vacuum tube tv, a Motorola quasar portable. im wondering if its worth any money or if i should just go ahead tear it open, and feast on its delicious inners it works fairly well with no discernible problems that i know of. i took a look inside and dident see any silicone. do people collect these or anything?

Question by The 4th Doctor   |  last reply


Vacuum pump voltage?

Today I was dumpster diving and i found an old vacuum so i decided to take the pump out but i made the mistake of not checking what voltage the vacuum runs on, because it also had a spinning component at the mouth of the vacuum. I think the pump works fine because i noticed that tube connecting the mouth of the vacuum and the pump was broke. Is there anyway to find out what voltage it runs on? would standard 120 be ok?The markings on it say 81 b-9 ECP 6500-240 HPU+ 60hz HD10 120 vac 07:07 does that mean it will work off a standard 120 outlet?update: What I am going to do with this motor has been decided. I will be attaching it to the back wheel of my bike with a car battery, i will install some type of switch on the handlebar or add something like a dimmer switch, this would allow me to have the motor on if i want, and i can adjust the speed. Please help fine tune this idea.

Topic by astrozombies138   |  last reply


Where are the vacuum balloons?

I am interested in making a vacuum balloon. I have been looking around and I can't find a single vacuum balloon that floated. If anyone has any links, pictures, videos, or suggestions they would be very helpful. The closest I found is this and it collapsed just before it floated.http://s113.photobucket.com/albums/n219/coreview2/?action=view&current;=VB03.jpg

Question by Danjor   |  last reply


vacuum pump wanted

Hoping someone would have a vacuum pump (manual or electric) they wouldn't mind giving me, hoping to make a vacuum cannon but missing a quite essential part ha ha

Topic by ToggleSwitch   |  last reply


Vintage Vacuum Tube? Answered

I have a vacuum tube from my collection here that I would like to test. It says on the box International, Electronic tube, GTE, Sylvania, And what appears to be 12Z - the last letter or number I don't know its either a 1 or a capital i, 12Z - I or 12Z - 1. It has 12 pins, 3 of which are not connected to anything, I can see that visually. Any help would be appreciated.

Question by Electric Spectre1   |  last reply


vacuum cleaner robot?

How can I make a autonomous vacuum cleaner robot for my home purpose?

Question by ramkrish   |  last reply



Vacuum Forming Molds

hey guys ive been reading a lot lately about vacuum forming and homemade vacuum forming machines (kudos to everyone who has made one by the way, theyre awesome), because i want to start early on my halloween costume this year and after some research i found vacuum forming would be the best way to make my costume. so my question for you guys: what do i make the molds out of? unfortunately, everywhere ive looked, there hasnt been a real detailed description of how to make the molds for the parts, its usually more along the lines of "now put your molds on the platen and place the heated plastic. . ." without describing how aforementioned molds came into existence. thanks a ton in advance!

Topic by puno   |  last reply






repair dyson DC07 dirt cannister release?

The little tangs that hold the dirt cannister bottom door closed have broken off and cannot be found. Have been using duct tape as a temp fix. Any ideas?  Thanks,   Ken

Question by ken pulver   |  last reply


Building a vacuum former table

I want to build a vacuum former table at home but I want to know if I can get texture and other details showing in the mold with this process.

Question by    |  last reply


Vacuum Tube Chess Set

This chess set made from vacuum tubes is pretty stunning. Plug a tube into a square and the top lights up. I doubt that the pins will stand up to very many games of chess, but it is lovely to look at. Vaccum Tube Chess Set via Make

Topic by fungus amungus   |  last reply


Vacuum motor on go kart?

So, I'm fairly new to electric motors. I salvaged a motor from a vacuum. I know that they have high torque. I'm just wondering what kind of weight they could move. For example, if I weigh 225, would it be able to pull me on a go kart?  Thank you!

Topic by jmeservy   |  last reply


Vacuum tube clock kit

This lovely clock is made from a new kit from Adafruit Industries. Once they're back in stock you can get the whole kit for $65 or just the PCB for $15. If you truly want to do everything yourself you can make the whole thing yourself with instructions here.HOWTO make a vacuum fluorescent display clock

Topic by fungus amungus   |  last reply


HEAT SEAL or vacuum seal

Been looking all over the net for help on this, thought maybe someone here might be able to help. I need to mock up a DVD package for a DESIGN class and wanted to do something based off the Special Edition SAW DVD case in which a red liquid was trapped floating between to layers of transparent, flexible plastic. In this space it could be moved by pushing it through the plastic. So does anyone know a way i could accomplish this on my own? Vacuum sealing? Heat sealing?

Topic by 333Design 


Automatic Vacuum Toggle Review? Answered

I'm working on building an automatic vacuum toggle to use with power tools. I'm basing the design on what I found here https://www.instructables.com/id/DIY-Shop-Vac-Dust-Collector/ I have modified the base design to allow a little more flexibility and to make the switch box portable: https://wiki.jasig.org/display/~edalquist/Vacuum+Toggle The part I'm most unsure about is the simple RC network that is acting as a time-delay for the big relay. I've done a bunch of reading but it seems like ever RC delay diagram I find is different. I have the big parts on their way and will be stopping by a local place for the small stuff. I'm planning on posting a detailed instructable once I get the thing working.

Question by edalquist   |  last reply


Looking for chemistry items/vacuums

Hey guys, I just recently got parts to make my own magnetic stirrer and heating plate for organic chemistry! I don't very well plan on getting a glass blower oven so if  you guys have any glassware somehow, please let me know. If you have old vacuums, a vacuum pump (not submersible) let me know too! thanks!!

Topic by GreenD 


A good deep vacuum pump? Answered

I'm looking for a vacuum pump for use with projects like the fusor included in make magazine, a laser tube, or a plasma ball.  It doesn't need to move huge amounts of air, but nothing below 1.5 lpm.  It also needs to have an ultimate vacuum of at most 25 microns.  I have been unable to locate any pumps which meet these standards, all of them have ultimate vacuums of around 100 to 75 microns or are completely unlisted.  Do any of you have some experience with these and some advice.  I don't need something for pumping out heating/cooling units daily, just a very deep vacuum a couple times a month.

Question by jj.inc   |  last reply


Vacuum forming heat source

Hi! I am planning to build a vacuum forming machine that does not use a seperate oven to heat the plastic. For my 3D printing hobby I have come across many heated beds, also some on 230v. Could something like this (https://www.ebay.com/itm/30X30CM-750W-220V-Silicone-Heater-3D-Printer-Heated-Bed-Pad-30cm-Thermistor/401257671771?hash=item5d6cd22c5b:g:iVEAAOSwx6pYrp70) with a heat sink be used for such an application? Thanks!

Topic by ttreurniet   |  last reply


VACUUM CHAMBER for DRYING ELECTRONICS

Some time back, it occurred to me that a sufficiently strong vacuum would be useful for drying wet electronics. After all, water boils at lower temps at higher elevations, and in space, water will even boil at 33F ( 1 C) Freeze-drying coffee is another example of using high vacuum to desicate stuff. I hooked up a vacuum pump which had been marketed for bleeding hydraulic brakes and clutches to a pressure chamber for extending the life of tennis balls.  It did not seem to work when I tried rapid drying a damp paper towel. Indeed, my control, another paper towel left out at room temps dried before the one in the vacuum chamber. I think I've heard of repurposing a refrigeration pump to act as a vac-pump. Someday, I may try that, but would prefer not to have to deal with the freon. Besides that, if someone is scrapping a fridge, and I can pick it up free, will the pump be any good?

Topic by Toga_Dan   |  last reply


Air Compressor/Vacuum Pump

I have a theory: You have your supply of compressed air. You connect that by hose to one branch of a y-connector. The other branch is connected to a hose that goes into some sort of fluid that you want to move from one vessel to another. The trunk of the y is your exhaust (in theory). So now I give, say, 15 psi out of my air supply and that shoud drag my fluid out of its vessel through the y connector to the destination of my choosing. Would that work?

Topic by flagrantfouler   |  last reply


I Got a Vacuum Pump

I recently obtained a Vacuum pump from the school (they got it from like a barn or something where it was sitting for like 10 years, so it needed a lot of cleaning, lot of dirt). I'm not sure how strong it is, but it is powered by a 1/2 HP motor (the same motor that I got earlier, I'm just now using the Vacuum pump) and uses pullies to make the torque more around 2HP. Couple of Questions: -It works (I'm not sure how well, if you put your hand over the output and give the pulley a 1/4 rotation turn it generates a noticeable amount of sunction (and sounds like an opening bottle of wine when you take your hand off). -What usually goes bad with old pumps, can I prevent it? -I should probably change the oil, is there a cheap local way of getting some (like some sort of auto oil?) -Do you think there's enough suction to create a vacuum tube. (doesn't have to be precision made, it's for Tesla Coils, think large Vacuum Tubes)

Topic by guyfrom7up   |  last reply


Making plasma in a vacuum chamber?

Im having trouble generating any kind of plasma and i guess not fully understanding this. Heres my setup: A metal pot with a Plexiglas lid as vacuum chamber. a pressure gauge on top A vacuum chamber A MOT as the power supply. Dont have equipment to measure high voltage but id guess around 2KVAC as thats what i understand is standard Two terminals about 2 inches apart inside of the chamber made from copper. one coming from the top, one from the bottom.  I hook up the terminals , hear the nice MOT buzz, but nothing happens inside of the chamber. The mot has been tested and does work.  Any clue or direction to point me in?

Question by GalaxyX   |  last reply


Vacuum Tube Night Light

Hello All, I have four 12AX7A vacuum tubes out of an old guitar amp.  I'm not sure whether they work or not-the sound was extremely poor, but this could have been due to any number of things wrong with the amp, which is gone now.  I saved the tubes, as they still lit up when powered on.  I would like to turn the tubes into some kind of low glow night light/art project, but am not quite sure how to go about wiring them in parallel with one another, or even the correct voltage.  I have no experience with tubes, but would love to start learning, even just the basics...like how to power them up.  How complex a circuit would it take to do this?  Thanks!

Topic by huck alexander   |  last reply


Pressure, vacuums, and the on earth equivalent?

One atm is equivalent to about 14.7 psi.  Does that mean that if one was in a perfect vacuum a vessel sporting 1 atm would need only hold the pressure of 14.7 psi?  It seems to me that in space (not a perfect vacuum) a craft would only need to hold maybe 12 psi (of course when messing with human life I would definitely allow for 150 to 200% tolerance, but in the end 24 psi still isn't very much is it.  Is there more to it than this, or are all those quotes about how hard it is to deal with a vacuum and how things must be super strong a little over blown.  Going just 11 meters under water exposes you to a little over double air pressure at sea level.  Someone in just a diving suit has been to over 60 times atmosphere and the deepest submarine dive I could find was 1083 atm at around 11000 m.  It just seems to make holding out a vacuum a little overrated.

Question by seedorfj   |  last reply


Shop Vacuum Hose Adapters

The more I try and understand the nightmare that the shop vacuum hose and adapter issue has become, the more I have to believe Washington was involved in its design. There is apparently no more oversight of this industry than there was over Wall Street and the banks that led to the second great depression... Can someone tell me where a person can find a source that makes real problem solving adapters, and tells you the true inside and outside diameters of both ends instead of contributing to the confusion of this national mystery? Thanks

Topic by TerrifiedCitizen   |  last reply


Got a Lot of Vacuum Tubes

I just bought a lot of 125 vacuum tubes on ebay for 30 dollars including shipping (the seller didn't list what tubes were there, just said a crate) I got the following (if the same name is listed 2 times in a row, then I got 2): 10JA8 12AD6 12AE6 12AF6 12AU6 12AX4GTA 12BD6 12BE6 12BG6 12C5 12CN5 12CU6 12J8 12K7GT 12RS 12X4 17AX4GT 17BR3 18FW6 18FX6 18FY6 1B3GT 1G3GT 1G3GT 1S4 1S4 1S5 1T4 1U5 1U5 1X2B 21LR8 2BN4 2BN4A 2CW4 2CY5 32ET5 3S4 3S4 3V4 4BQ7A 4BZ6 4BZ7 4BZ7 50B5 5AT8 5AT8 5AT8 5AT8 5BR8 5T8 5T8 5T8 5T8 5U8 5U8 5U8 5U8 654A 6AB4 6AF4A 6AG5 6AG5 6AL5 6AL5 6AM8 6AQ5 6AQ5A 6AS8 6AT6A 6AU6A 6AU6A 6AU6A 6AV6 6AV6 6AX4GTB 6BA6 6BA6 6BA6 6BA6 6BA6 6BE6 6BE6 6BJ6 6BK7B 6BN4A 6BN4A 6BN6 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BU8 6BZ7 6BZ7 6BZ7 6BZT 6CB6 6CB6A 6CF6 6CG8A 6CN7 6CY5 6CY7 6CY7 6CY7 6DQ6A 6DQ6B 6EA8 6FM7 6GN8 6H6GT 6J6A 6J6A 6J6A 6S4A 6SA7 6SJ7 6SK7GT 6U8 6U8A 8FQ7 9A8 I'm thinking about making a small amp (below 5 watts) for my ipod, which one of these would be best?

Topic by guyfrom7up 


Vacuum tube amp help

I just bought a lot of 125 vacuum tubes on ebay for 30 dollars including shipping (the seller didn't list what tubes were there, just said a crate) I got the following (if the same name is listed 2 times in a row, then I got 2): 10JA8 12AD6 12AE6 12AF6 12AU6 12AX4GTA 12BD6 12BE6 12BG6 12C5 12CN5 12CU6 12J8 12K7GT 12RS 12X4 17AX4GT 17BR3 18FW6 18FX6 18FY6 1B3GT 1G3GT 1G3GT 1S4 1S4 1S5 1T4 1U5 1U5 1X2B 21LR8 2BN4 2BN4A 2CW4 2CY5 32ET5 3S4 3S4 3V4 4BQ7A 4BZ6 4BZ7 4BZ7 50B5 5AT8 5AT8 5AT8 5AT8 5BR8 5T8 5T8 5T8 5T8 5U8 5U8 5U8 5U8 654A 6AB4 6AF4A 6AG5 6AG5 6AL5 6AL5 6AM8 6AQ5 6AQ5A 6AS8 6AT6A 6AU6A 6AU6A 6AU6A 6AV6 6AV6 6AX4GTB 6BA6 6BA6 6BA6 6BA6 6BA6 6BE6 6BE6 6BJ6 6BK7B 6BN4A 6BN4A 6BN6 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BU8 6BZ7 6BZ7 6BZ7 6BZT 6CB6 6CB6A 6CF6 6CG8A 6CN7 6CY5 6CY7 6CY7 6CY7 6DQ6A 6DQ6B 6EA8 6FM7 6GN8 6H6GT 6J6A 6J6A 6J6A 6S4A 6SA7 6SJ7 6SK7GT 6U8 6U8A 8FQ7 9A8 I'm thinking about making a small amp (below 5 watts) for my ipod, which one of these would be best?

Topic by guyfrom7up   |  last reply


New Vacuum Pump Idea

I have a new idea about a new type of positive displacement vacuum pump.  Its of the piston variety, but instead of a one way valve which doesn't work when the pressure gets low enough, another piston is used to act as a valve switching between the vessel to be evacuated (when the main piston is pulling a vaccum) and the atmosphere (when the piston pushes the air evacuated out). This solves the one way valve problem.  Could this pull a much lower vacuum?  I need a fairly strong vacuum, but I don't want to have to build/buy a turbomolecular pump. Also, i have a metal lathe, that's why i'm going with the piston variety.

Topic by guyfrom7up   |  last reply



Vacuum cleaner as wood dust collection?

I was wondering if it is possible to use a vacuum cleaner as a form on wood dust collection in my workshop. What type of vacuum clearer would be the best for this, one with a bag, bagless, whatever. If this is possible, what precautions should be taken to ensure smooth operation of this setup. I'm worried about wood dust possibly clogging up the vacuum cleaner. Any help/ more info/ ideas/ would be great.

Topic by SirMalan   |  last reply



Cleaning the oil for a vacuum pump

Was too lazy to do an Instructable about it and think a lot of pics or even videos won't help much if you know what I mean ;) Some of us use rotary vane pumps not for the purpose of evacuating refrigeration systems but for all sorts of fun and experiments. This means quite soon or often we face the problem of the oil taking in a lot of water or even worse particles and solvent fumes. I don't know about you but I was getting sick and tired of replacing the expensive oil every few weeks or sometimes even days if something got too wrong. There are many different blends of compressor oil out there that will work very well in our rotary vane pumps. The main difference is whyt the oil is designed for. Some are perfect for aircon systems, others for the work with solvent fumes and there are even those special oils that bind moisture. Unless you really need to evacuted special gases or solvents basically any low viscosity oil will do us just fine! So instead of paying 20 bucks for special compressor or even vacuum pump oil we can select the cheap everyday oil. Well, not exactly... We also want to be able to recycle our oil to save even more money. That means we don't want an oil that binds to water to keep it out of harms way. We also don't want any oil that has special coating abilities for example these oils claiming to reduce wear and tear on your engine. But any other low viscosity mineral oil or if you prefer synthetic oil will do - just stay away from silicone based oils!! If you have not used your pump for a few days you can often see a slude at the bottom of the viewing glass. If the rest of the oil is clear you can simply drain this worst bit and top up with fresh oil if required. This simple procedure saves you a lot of oil already, at least if your pump has some rest every now and then. Once your oil looks wasted it is time for the recycling and cleaning: Release the oil into a high glass jar or these facy spaghetti glasses. Fill with fresh oil and give it a short run. Release this oil as well and wait for it to properly drain. You now have the inside of your pump nice and clean again, time to fill one last time with fresh oil to keep using the pump. The filthy oil we now have in our jar should be covered with some fine cloth or filter paper and placed somewhere warm. After a week or two the oil, filth and water will have seperated and you pump, drain or siphon out the now clean oil for further use. Don't be too exact here trying to get all the oil out, just remove what you can without risking to suck in the filth from the bottom. Simply leave the rest in the jar and add the next oil change to it for the same recycling process. Solvents.... In some cases we will work with solvents and that means the oil might bind to them. Acetone for example is quite nasty here and can change the oil itself by breaking down certain components. In most cases it means the viscosity will be reduced, which is not really too bad for us. What is bad however is the fact that these solvents often refuse to fully seperate or evaporate. Once the oil looks clean do a smell test and if it smells like solvent then for sure there is solvent in it. Next step to confirm is to do a lube test. Simply place on some smooth metal or glass and smear it with your finger - a drop is enough here. If it feels sticky on the surface, gives you a rubber like feeling when sliding over the surface or is far less "slippery" than the fresh oil you also have a problem. I found that filling this contaminated oil into a proper container and applying a strong vacuum will remove all solvent residue in a very short time. Downside is that the oil in the pump is contaminated again, so it pays off to collect solvent contaminated oil seperately and once you got enough for several refills use the pump to get rid of the solvent. When done do another smear and smell test, if still smelly repeat if no longer smelly but still the same bad feeling on the surface: Discard as the oil might be broken down by the solvent.

Topic by Downunder35m   |  last reply


DIY toe kick vacuum?

Has anyone used a shop vacuum to build a toe kick vacuum (for a cabin where there is a basement but no central vacuum )

Question by kscobie   |  last reply


Kid climbs walls with vacuum cleaners

A boy in the UK uses a couple of vacuum cleaners to climb walls like Spiderman. It's an amazing thing for a 13 year-old to do and... wait a second. This is just a copy of something that was demonstrated on TV in the UK well before this. So let's start over. A boy in the UK shows that you can get some media attention for doing a recreation of something that's already been established as amazing, even in the same country. Pretty shameless. Spiderlad via Inhabitat

Topic by fungus amungus   |  last reply



What to do with a Vacuum cleaner ?

What can i do with a working vacuum cleaner that i do not use any more ?

Topic by arylic   |  last reply


Cheap pourable material that will hold up against a vacuum? Answered

I'm looking to make a buck for vacuum forming using pepakura. I would like something I can then backfill the pep with something cheap (and preferably light) that will hold up against a vacuum. 

Question by DoctorWoo   |  last reply


Vacuum cleaner motor disassembly

Old vacuum cleaner stoped working and I took it apart to find bearing in pieces but I dont know how to remove fan from the motor there is usually a nut but I dont see one

Question by StodgiestOwl324    |  last reply


English Spiderman climbs walls with vacuum cleaner

Jem Stansfield is a great guy. He cobbles together a Spiderman suit with some vacuum cleaners and climbs the outsides of buildings with it. That's just awesome. From the article: "I hope activities like this teach children that if you understand the world around you, you can make it work for you," he said. "Normal boring day-to-day objects can do exciting things for you." This dude is my new hero. And it gets better. His future plans involve driving a car powered by coffee beans. He's like an alternate universe version of Tim Anderson. The first video covers the making of the gloves and the second is a climb up the outside of a building. Link via gizmodo

Topic by fungus amungus   |  last reply


What's a good electric solution for vacuum-sealing canning jars?

The consumer-market vacuum sealers often have attachments for vacuum sealing canning jars, but they're mostly designed for use with bags.  I have to assume that one made for canning jars only would be much more compact and take up much less counter space. There are a few i'bles around on how to use the canning-jar attachments with hand pumps - bicycle pumps or brake bleeders.  But they're slow and tedious. I've search Harbor Freight for vacuum pumps, and everything I've found was way too big, and way too expensive, for this little job. Any ideas?  Something that can pull .28mHg on a quart of air, in a couple of seconds, that can be plugged into a canning-jar attachment, and can be kept on a kitchen counter?

Question by jdege