Gah look how much cpu and net traffic uploadig a vid on the tube makes! help
Posted by maker12 10 years ago
I recently got a 1920's RCA Radiola 60 Tube Radio , and when I was servicing it I kinda accidently dropped a tube and the vaccumm seal broke and the glass broke. on the side of the tube it says "Philco H 5" it has four pins two bigger two smaller. Here are some pictures of it for reference.
Posted by jackillac92 10 years ago
Does anyone have a schematic for a stereo tube amplifier, I just acquired a large quantity of tubes, a tube tester and some other assorted electronics from my grandfather. Ive always wanted to make a nice tube amp, now all i need is direction. It will be another 2 weeks or so before I can actually pick them up and start testing them so I was just trying to find some schematics to get me in the right direction. I figure this may even make a nice first instructable as long as im not completely lost in the schematic. Thanks smoke
Posted by smoke 11 years ago
The "Vacuum Tube" group needs a first forum topic. Here it is... Sorry 'bout the pun... but I could have used Time to get Organized... Be thankful ;-)Vacuum tubes and parts tend to be rather expensive these days. But there's a good source for parts, and it's often free: old tube organs.I picked up a working 1960 Wurlitzer a couple days ago. It's got:-- full complement of tubes (the mother lode!), including9 (nine!) 12AX7 preamp tubes.2 6L6-GC power tubes1 5U4-GB rectifier(there were other tubes: (28!) 12fq8's but they're not so useful for audio...)-- Huge power transformer-- Large (20-25 watt) output tranformer-- two 16 ohm speakers-- lots of carbon-comp resistors, sockets and other reusables.Total cost--just gas, and a sore back.Even the non-tube organs are a good source of speakers, reverb tanks, pedals, etc. The tank, bass pedals and the volume pedal were from a solid-state Conn organ left on the curb...The bass pedals could be made into a MIDI project, and the volume pedal would be a nice start of a wah, or left as-is. Yeah, they are grungy, but that's easy to fix....
Posted by gmoon 10 years ago
Hi, I am currently designing a stereo/mp3 amp for my education and I was wondering... Is it possible to incorporate a Valve/tube into a conventional stereo circuit? (like a standard valve amp but smaller and without the Equalization effects) I suppose the Valve/tube watts would have to match the speakers, but is this possible or would I have to use a circuit from a guitar amp that is already paired with a valve/tube amp system?! Much appreciated. -Rob
Posted by RobertChallingsworth 6 years ago
Hey everybody, Ok so me and my friend built a rubens tube for our science project and fired ot up today. It was awesome! But, we have one problem. the flames keep getting blown out or are dying and we dont know why. Our tube is about 4 or 5 feet long and has holes every half inch (1/16th drill bit). we used latex sheets on both ends. the propane is a camping tank (small) and feeds the rubens tube through 2x 1/4 inch feeds spaced evenly apart. It may just be that we need to let the tube pressurize more. Our tube is 4 inches in diameter and is about 5 feet long. We let it pressurize for about 5 minutes. I think maybe somewhere along the lines of 7 minutes might do the trick, because when we went to light it, the initial flame height was very short. Has anyone else used the same setup we have?
Posted by ir0n_ma1den 10 years ago
Hi- So I scored an old stereo from a friend that works- everything but the turntable anyway. i want to convert it into a guitar amp, but other than +/- i don't have any electrical knowledge. looking for any tips advice on the easiest way to go... i can post pics if needed. in my head: taking the input for the turntable or something like that then wiring a 1/4" input for a guitar somewhere. is that possible? i've looked at most of the tube amp instructables & am not finding what i really want. any help would be appreciated! i can follow instructions well, just not sure what to do, and don't wanna get into something way over my head!!! THANKS! brandon
Posted by greezus 7 years ago
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
Posted by fungus amungus 9 years ago
I need to attach a tube (it is fairly rigid, like a bic pen body), to a box (coming out of the smaller end of the box) and it needs to be fairly secure as there will be wires running through it and a "pickup coil" attached to the end of the device. The box may be plastic, or it may be metal, I haven't decided yet. I had thought about threading the barrel of the tube and just using two nuts to lock it in. Any other ideas would be greatly appreciated.
Posted by Goodhart 10 years ago
I m really really curious about something you know the starter switch used in fluorescent tubes have a glass "bulb/tube" with a bimetalic strip i know what that is for but i dont understand what the coil beside the "bulb/tube" is for, and it feels like a coil but i think its more of a piece of metal wrapped i n plastic
Posted by michaelgohjs 8 years ago
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!
Posted by huck alexander 7 years ago
What do you think about making a bike out of polypropylene tubes? Yes, that ones that you use for water in your home. Here is a picture if you don''t know what I'm talking about: http://t2.gstatic.com/images?q=tbn:ANd9GcSlt1l1TJBvDnuc8kboERt8aULrcyFnvraA9b28m7Aii4rsIpqqhQ Obviously the design won't be like normal bikes. It will be more reforced. My questions are: 1-How wide the tube needs to be? 2-How I joint them? I want to do the frame for an electric bike. It will be a lot lighter than welded steel. Thank you. Regards.
Posted by faacuunndoo 6 years ago
HiI have a couple of broken CFL's, The tube still works and I want to do something with it.Any ideas on how to make it light up from 12 volt, Without a ionization antenna (Using the heating filaments instead).Any other ideas??Anyone else want to know what to do with them too?I don't want any comments that say THROW IT OUT or similar
Posted by thermoelectric 9 years ago
I already have sky lights installed in an unfinished attic. I figure I could try lining some heating duct with some of those Mylar emergency blankets, butt it up against the skylight and then install a modified recessed light fixture in the ceiling. Connect the tube to the light fixture and it should work the same as the $300 units. I understand the effect the dome could have on collecting light, I do have some security camera domes, but don't want to go cutting holes in the roof unless it will work. ???anyone Thanks
Posted by meisjedog 9 years ago
Hello everyone, I've been looking at LED projects and devising my own for quite some time now. What i finally decided on was a Plexi glass tube containing a bonsai tree, with an LED array above to give it light. My plan for the LED array is squared away. and i have selected my tube (diameter of 8in). My hold up is the base and the roof of the tube. I want a fairly heavy material which can be machined to yield a snug fit. Does anyone one have any suggestions for the material or a possible source? if at all possible i would like this component to be less than 30$.
Posted by Xarshale 6 years ago
My brother has some cold cathode tubes, some about 6" long, some about 12" or more. I was thinking of hooking them up to my bike, as shown in one of the great Instructables here, but I wasn't sure of the voltage. I don't want to over-power the tube, and bust it. Plus, the two wires coming out of it are in this black connector, so I don't know which is positive or negative. The tubes put out blue light, if that makes any difference.I have an old sports radio, which works pretty good and could be turned up really loud. I desoldered the speaker, and hooked it up to a pair of wires coming from a head phone jack. I plugged it into my iPod, expecting loudness, but no - I had to hold it up to my ear, on full volume, to hear it. Is it because the iPod isn't outputting as much voltage or current to the speaker as my radio was? The radio used 3 AA. I really wanted a portable speaker that actually put out big sound, so I didn't have to have those buds stuck in my ear.Thanks y'all!
Posted by Bran 11 years ago
I live in estonia. No bamboos here. So I was thinking to use copper tube. I find this http://www.aflauta.com.br/hist/bamboo.pdf Problem is inside diameter and wall thickness. If i'm getting it right for every key is right inside diameter and lenght I can buy straight copper tubes/pipes: 15mm(outside diameter) x 1,05mm(Wall thickness) 1,05x2=2.1mm 15-2.1=12.9mm(inside diameter) 18 x 1,0 1,0x2=2 18-2=16 12 x 1,0 1,0x2=2 12-2=10 10 x 0,8 2x0,8=1,6 10-1,6=8,4 Whats the best? I was thinking to use 15mm and 18mm tube 18mm for key a 15mm for key d I ended up with 15x1,05 copper tube. Thinking how to use this: http://11wall-west.com/~ph_kosel/flutomat.html If I use this measures http://www.phy.mtu.edu/~suits/pvcflute.html I get 7.2mm for blow hole and 6mm for finger hole. My tube I.D is 12.9 Is there any flute calculator that calculates hole sizes for right key? I am also thankful for any flute related help what helps me to make copper flute.
Posted by DeathSuperMario 3 years ago
Hey all, I'm in warren Michigan area. I found a great place for some decent sized scrap hardwood like maple, oak, cherry. Sometimes walnut or other more exotic types. North of warren in Fraser there is a cabinet company called audia, in the back they have a large amount of 1-1/2" wide X20' lengths! Also, a place called laired plastics has an assortment of different color, sheet plastics various thicknesses as well as blocks of white plastics. In the back they have several bins with different material in each one... Now, i need a place to get square tubing with the holes in them. I need about 12' of it but i don't need any piece longer than 1' anyone know of the business types that would specifically deal with this stuff? I see them knocked down by cars very often, i can work with those! Lol i just need to know where to look to find them. Google has an overwhelming amount of suppliers, but i don't need long sticks i just need some scraps... Call me cheap, buti would like to find them for as free as possible!
Posted by SlickSqueegie 5 years ago
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?
Posted by guyfrom7up 9 years ago
Anyone able to make a guide on how to create a DIY tube and pipe roller? Roller's is not the same as benders, benders make sharp bends while rollers make adjustable gradual long archs. Should be able to bend atleast 2" tubing and pipes. Best regards Tom
Posted by randomher0 9 years ago
Well, it is science fair time once again and me and my friend have decided to build a rubens tube and test differences between frequencies. Anyways, There are 2 good instructables on the subject and i am not sure which one to pick. We need to start building it this weekend so all the parts must come from home depot or somewhere. any suggestions?
Posted by ir0n_ma1den 10 years ago
I've got this hollow cathode tube from a spectra aa machine (used for metals analysis). It was supposedly still working - my old boss at the lab I worked at found it and considered tossing it out as they no longer had that AA machine (they had upgraded to an ICP/MS), but knows I collect interesting looking things. Am I right to assume that cathode tubes are quite dissimilar to the variety of tubes used in vintage amps and of no use in that regard? Does anyone know what sort of power I'd be looking for to even get this thing to light up? On the plug at the end of its cable, they posts are labeled A through F, then H, J, and K.
Posted by incredibleweirdo 9 years ago
Im looking to build something like a milk dispenser where the milk can be sent through a tube and opened with either a spigot or a handle. It could also be something similar to a box of wine, where the wine is in a bottle, and flows when the spigot is opened, but I would like to know how I can have it so that it comes through a tube when opened. Is it possible to create something that will pull the milk when exposed to air? thanks for any ideas! If these plans are already made or something similar, can someone send me a link? thanks again! Anthony
Posted by lordpyro7 5 years ago
Hello, I was watching a video where someone was using a mailing tube a hedgehog slide. I wanted to do the same with our heggie as he loves to burrow and will dive off any ledge he can find if we don't watch him. I think the one she used was 3in, but our heggie needs a 4in round and since here is a bit rounder; it needs to be about 3-4ft as well, though we could cut it down. I would like to find an alternative that is clear or semi-clear as it would be nice to be able to see him in the tube as he slides. It also needs to be fairly inexpensive. For anyone interested, our heggies name happens to be Burrow as well. Maybe a fairy whispered it my ear because we choose the name when he was no larger than a large spiky button and it was 6 weeks before we could bring him home. He has wobbly hedgehog syndrome and we really want him to have some fun. Thanks for any help, Liocorno
Posted by liocorno 5 years ago
G'day I have done the obvious searches, with no luck... So I was wondering.... Does anyone know if stainless steel tubing, has a minimum standard PSI rating? I ask this because today at work I found a hidden stash of old Stainless tubing.... It's cheap because it isn't a carried line anymore.... But the manufacturer or any trace of packaging/PSI is long since gone.... I'm talking $8 AU for a 6metre length of 16mm Stainless with a wall thickness of 1mm, and $12 for a 6m of 30mm .... Is there anyway of telling what PSI rating, it would have from the gauge or internal seam..? I am aware that most stainless for pressure is generally around your 1000PSI+ mark, just wanted to query you knowledgable folk, before using it for high PSI... I would appreciate any help, because I can't hide these lil' babies much longer.... There is about 15 length's of each... Thank in advance... ;)
Posted by Lftndbt 10 years ago
This is Killer Kobra, my first tube-supported coaster, and I want you (the people of instructables) to help me with the layout. So far I have made the lift and a drop. Now I need you to choose what I should do next out of the options below: option 1:Loop option 2:Zero-G roll The last two pictures show a loop and a Zero-G roll. After the first 7 comments are posted the element with the most votes will be added to the roller coaster. Check back for Updates on what I should do next.
Posted by Tornado96 8 years ago
((I wanted to post that as an instructable but indeed it's not really a project so as seamster said, it belongs to the forum, I hope it will be useful ;) )) I like symbols and letters and alphabets a lot ! [bla bla bla if you want to read all the stuff I was saying: https://www.zerobin.net/?94233ecec289eaf1#h/8pT8cAlxplvQJNn3ql9K8T8PBa36e13btxF40yu/Q=] When I'm a bit lost understanding something (might be a word, an acronym or some letters I'd like to understand how they sound). I go to translate.google.com (I think and hope there are others services, if you know some alternatives, please post, I'd love to see the alternatives) and I choose the language I'd like to see the keyboard of. Then I press the virtual keyboard button on the base of the input box to make a virtual keyboard appear, this virtual keyboard contains the disposition and letters from the language I chose, may it be Russian, Greek, Yiddish, Khmer (Cambodge), Corean or other. Sadly there is no available Japanese or Chinese keyboards available now, which is a shame :'( That's all for today/night and I hope it might be useful to some people PS: If you have any ideas on what I could do out of those фэу-35 scintillator tubes, please post ;)
Posted by nazmo76 2 years ago
Hi everyone, I have a project I'm working on which has two halves that are connected using a potentiometer as the axis, resulting in the two being able to twist, changing the resistance of the potentiometer. The problem I have is that the battery is in one half and the circuit is in the other half. I have to somehow get the power to the circuit, but still have the pieces still be able to rotate. I can't have the wires just sticking out of the side because it has to twist, and that would look horrible. My first thought was to drill a small hole through the shaft of the potentiometer, so that I could run the wires through that, but when I tried to do that, it turned out to be a lot harder than I expected and I now have a busted potentiometer. I would really like to avoid slip rings of any kind, as they would be exposed to the elements. Does anyone have any ideas, or any advice on how to drill a nice hole through a steel rod lengthwise? Ideally I would drill the hole, but if that's too difficult, I'll try whatever. Thanks ~Dudes
Posted by dudes 2 years ago
I have several Instructables that I want to make using inner tubes. I have used a couple of rubber type glues and sanded the inner tube and it still does not bond well. I will appreciate any suggestions. I need a good bond. Thanks. Sunshiine
Posted by sunshiine 6 years ago
I am thinking of getting a Spyder MR1 to convert into one of these. Anyway, the issue is the forward vertical grip piece. I am pretty sure that it is just basically a square tube that the gas feed hose runs through. I really don't need it there because it would interfere with the design. No one has been able to tell me if it can be removed. Hence, my asking here. I think there is a screw on it, but I am not sure, So, after all that background crap, my question is: can I remove this thing without messing it up?
Posted by ilpug 6 years ago
I guess this question has two parts. I'm prototyping a solar energy device, part of which is a light pipe to transport the collected solar energy, about 300 - 2500 nM. I'm planning on making this from a flexible tube filled with a highly refractive liquid, stoppered at each end with clear plugs. It looks like the materials I should be using are: Tube: Teflon (PTFE, FEP, AF 1600, AF 2400) in that order of desireablitity, lowest to highest. The AF 2400 has a refractive index of 1.29, which is the lowest of any polymer. Apparently. Core: Mineral oil / liquid paraffin. Plugs: Acrylic or normal glass. Thoughts? Also, where would you suggest I try to find these? (I have the mineral oil already) Keeping in mind that I'm in Madrid, Spain. Getting this to work would make a huge difference to solar microgeneration, as transporting the energy is currently a bit of a nightmare. Thanks heaps, Daniel.
Posted by SolarFlower_org 8 years ago
I was searching around on youtube and was like HEY. Theres Erics profile so i clicked it and subscribed to his youtube....check out my commercial.. although, its blurry, the site doesnt exist anymore and that was 2 years ago and my username has changed a bit over time.
Posted by Yerboogieman 10 years ago
Can I get a 700x25 tire and tube and put it on a bike wheel that has a 700x38c tire and tube in it?
Posted by Bikeshoe 4 years ago
I'm making a prop that requires a length of coiled copper tubing & I don't have the cash to buy it. I need a plastic tube that is malleable into a coil & I can spray paint it a copper color. I've experimented with some types of plastic cover electric cord & aquarium tubing & both, the plastic reacted with the paint & never dried. I need to know what types of plastic tube I can ether paint myself & wont melt the plastic, or point me in the detection of were I can find copper colored plastic tubing, or name the types of plastic tube that wont react to certain types of paint.
Posted by elkaddalek 1 year ago
I'm trying to make a hole about a millimeter in diameter in the side of a piece of standard airline tubing. I've tried poking a heated needle through the side, but the hole was too small and the heat warped the plastic. How should I do this without destroying the tubing?
Posted by El Mano 4 years ago
I started thinking about how the tube material could be improved. Although I love the ghetto look of pringles wrapped in the invincible duct tape, improvements can be made. You could use PVC or ABS for the tube, it wouldnt need pressure rating because Im sure this thing wouldnt have enough power to explode the pringles/tape team. This is rather cheap and you could just glue on an endcap. Then a BBQ ignitor can be threaded in, a ring to define the chamber and barrel and fuel sprayed in! However getting the perfect cost/durability/strength ratio is hard.
Posted by SNDM 10 years ago