High power vacuum tube tesla coil information unlimited. The plate section of the coil is wound with 14 inch copper tubing. It is friendly to the tube and the rest of your circuit. For clarity, it omits the decoupling capacitors, indicator leds, and power supplies. Nikola tesla was born an ethnic serb in the village smiljan, lika county, in the austrian empire present day croatia, on 10 july o. The basic purpose of a drsstc driver is to generate the drive signals for the inverter, synchronized with the zero crossings of the primary current. Marshall an interesting project for the experimenter.
My first vttc and my first video editing experience. This will be my second coil, when i finish building it. The combination of the twocoil driver and third coil resonator adds another degree of freedom to. Giant tesla coil utilizes 21st century technology radio world. A vttc uses an lc tuned circuit c1 and l1 just like a spark gap tesla coil.
In a recent test using a sstc as a driver i tried various coils that i had on hand. When the tesla coil tip is brought near the device to be leak detected under vacuum, the tip will spark around the glass, and ionize the low pressure gas remaining inside the device. Featured items newest items bestselling alphabetical. Many people request the schematic and details about my vacuum tube tesla coil. Modern transistor or vacuum tube tesla coils do not use a primary spark gap. As part of todays daily blog, i am including free schematics and plans for a vttc that uses. Drsstc driver guide onetesla diy tesla coil kits home page. Vacuum tube tesla coil vttc schematic interpretation. Over the years, many, many vacuum tube tesla coil projects have been described and we have listed several in the references.
In the electrical engineer of june 10, i have noted the description of some experiments of prof. A vacuum tube is mounted on top of a audio modulated tesla coil, while the pressure is slowly decreased. My vacuum tube tesla coil circuit overview and construction tips duration. At best, a toolong long groundwire will start broadcasting rf, so youd better use ism frequencies 6. Also addressed, within the framework of traveling wave engineering, is the open helical resonator as developed by nikola tesla in the 1890s. An old oscilloscope transformer was used for the power supply, providing about 1kv for high voltage and 6. Small vacuum tube tesla coil 2 under repositorycircuits. Heres one example of circuit with two 6l6 tubes that i found in old book janusz wojciechowski amateurs electronic models 1975. A tesla coil is an electrical resonant transformer circuit designed by inventor nikola tesla in. Vttc vacuum tube tesla coil rohrenteslaspule gu81 dercebe. The fundamental idea in these experiments is to set up an electromotive force in a vacuum tube preferably devoid of any electrodes by. Simply put, a normal solid state tesla coil sstc is simply a power amplifier driving a primary coil at the resonant frequency of the secondary coil. The secondary is a 3 inch pvc pipe wound with 850 turns of 24 awg magnet wire. Pl509pl519 half bridge base driven coil markos science site.
Jun, 2012 nikola teslas original creation the spark gap tesla coil has its advantages at high input powers. This tesla coil is alltube and even the power supply is tubebased and provides 320vdc. This is my first working vacuum tube tesla coil vttc. Vacuum tube tesla coil how is vacuum tube tesla coil. I was doing some looking around today and found a bunch of vidoes on youtube of singing tesla coils. Usually various transmitting power triodes are used powered by mot.
Brand new area of our production is broadcasting starting with spare parts for older transmitters, broadcasting components, up to complete systems for broadcasting of amfm radio signal. Funny i learned to use vacuum tubes after first learning about microcontrollers. Jan, 2010 well, this electrical savant built one in the 8th grade using vacuum tubes and a microwave oven transformer. As the pressure drops the thickness and length of the arc changes. The first true electronic amplifier was the vacuum tube triode. As mentioned, the secondary circuit is a coil of wire, one end of which is grounded, and the other end is connected to some kind of topload metallic volume at the top of the tube. Unfortunately, there does not appear to be much in the way of serious analysis, specifically directed toward vacuum tube tesla coils, in either the engineering literature cited above, or in the experimenter magazine articles. I used selfoscillating circuit with two russian soviet tubes gu81m connected in parallel. To go along with flyback drivers, xrays and other high voltage stuff, i have decided to build myself a tesla coil. My 3rd, and favourite small tesla coil project is this vttc, based around an old siemens rs1026 transmitting triode valve. The source of high voltage are two mots microwave oven transformers connected in parallel and with the secondary connected to the top of primary it increases the voltage. This book provides a thorough engineering analysis of the vacuum tube class c continuous wave rf oscillator. The tesla coil also made the jump to the vacuum tube as a source of radio.
As a result, the output is primarily determined by how much power the vacuum tube can process. Flyback tesla coil using vacuum tubes post by eftb. Chapter 7tesla coil driver 73 finally, resistors r1 were added to discharge the capacitor bank. Nikola teslas original creation the spark gap tesla coil has its advantages at high input powers. We can think of a vacuum tube valve, vt as an electrical valve in which current flows in one. Platecircuit impedance matching is a difficult concept to theoretically address with tesla coil loads. This is a version of a tesla coil where the primary is driven by a vacuum tube valve oscillator. Vacuum tube tesla coils operate in a continuous wave mode of operation, continuously providing energy to the tesla coil secondary.
Thomson, on the electric discharge in vacuum tubes, and in your issue of june 24 prof. If the driver is accurately tuned to the resonant frequency of the tesla coil, then the load current will be near zero during the deadtime. The primary coil is 20 turns, with a pf tank capacitor. Notice he tells you exactly how many turns of wire to use for each coil, so im not sure what your question is all about. Flyback tesla coil using vacuum tubes the radioboard forums. You can generally get much bigger streamers from a spark gap or solid state tesla coil, but vacuum tube coils are generally better at lighting up gas tubes like neon tubes and also you can put your hand in the streamers without being shocked unlike other coil types. My vacuum tube tesla coil circuit overview and construction tips. The tube used is a 4x150 transmitting tube that used. Flyback tesla coil using vacuum tubes post by eftb mon jun 21, 2010 12.
Tesla s original circuits as well as most modern coils use a simple spark gap to excite oscillations in the tuned transformer. More sophisticated designs use transistor or thyristor switches or vacuum tube electronic oscillators to drive the resonant. Construction shellacked cardboard form for outfits needed, heavy wire for filament and suit. We can think of a vacuum tube valve, vt as an electrical valve in which current flows in one direction only. The source of high voltage are two mots microwave oven transformers connected in parallel and with the secondary connected to the top of primary it increases the voltage a. The design and construction of vacuumtube tesla coils.
First, the primary tank coil should be 10 gauge or heavier. Tesla coils vacuum tube design information unlimited. Vacuum tube tesla coils vttc normal topic hot topic more than 15 replies very hot topic more than 50 replies locked topic sticky topic poll recent topics and posts. It runs as a self controlled oscillator, continually charging and discharging the tank capacitor into the continue reading. How to build a vacuum tube tesla coil vttc by xellers daniel kramniks project log follow. Apr 01, 20 a vacuum tube is mounted on top of a audio modulated tesla coil, while the pressure is slowly decreased. Vacuum tube tesla coils vttc normal topic hot topic. Apr 20, 2018 i built a vacuum tube coil in the late 80s around a 4cx250 tube and produced heavy arcs out to inches or so with 1250vdc input. It works because like charges in this case, electrons repel each other. In march 1896, after hearing of wilhelm rontgens discovery of xray and xray imaging radiography, tesla proceeded to do his own experiments in xray imaging, developing a high energy single terminal vacuum tube of his own design that had no target electrode and that worked from the output of the tesla coil the modern term for the. Because i live in a flat though, there would be no place to accomodate and run monstrous coil designs, not mentioning interference, so that is the reason why ive opted for small and sweet.
This required a driver circuit of some sort that would provide a square wave to the tube such as a gate drive transformer, or a floating fiberoptics controlled driver my idea that solves both of these problems was certainly something that world has never before seen a halfbridge amplifier of vacuum tubes, with the tesla coil connected. Well, this electrical savant built one in the 8th grade using vacuum tubes and a microwave oven transformer. Plus i just think they are a neat type of technology from times passed. This is a video of my dual 811a power triode vacuum tube tesla coil based on steve wards vttc1 design. Pl509pl519 half bridge base driven coil markos science. Jul 02, 2006 my vacuum tube tesla coil circuit overview and construction tips duration. Vttc vacuum tube tesla coil is a tesla coil with vacuum tubes as a switch. This is my first oscillator circuit using a vacuum tube, and my first vttc vacuum tube tesla coil. Then you would understand how a solid statevacuum tube tesla coil would need to function.
We can custom build vacuum tube or transistorized tesla coils up to 5 kw. The tube used is a 4x150 transmitting tube that used forced air cooling. This tube tesla coil was built inside a cpu power supply unit. Vttc1 dual 811a tubes vttc2 304tl vttc3 dual 833a vttc4 810 vttc5 single 833a vttc6 833cs, coming this winter staccato controller. The material within may not be complete or correct at the moment. This tesla coil is all tube and even the power supply is tube based and provides 320vdc. The vacuum tube coil uses a very large russian radio transmitter valve in place of the spark gap in the standard coil. I built a vacuum tube coil in the late 80s around a 4cx250 tube and produced heavy arcs out to inches or so with 1250vdc input. It would only do seven or eightinch sparks, and as the driver had no. How to build a solid state tesla coil sstc 2 by loneoceans labs. Teslas original circuits as well as most modern coils use a simple spark gap to excite oscillations in the tuned transformer. This definition appears rarely and is found in the following.
A tube with an anode, cathode and grid is known as a triode. Big vacuum tube tesla coil with gu81m vttc vacuum tube tesla coil is a tesla coil with vacuum tubes as a switch. Tesla coil leak detectors a simple method to check for leaks in glass to glass seals is with a tesla coil leak detector. Vacuum tube tesla coils vttcs are not very common these days, but are still ranked very high in the overall coolness factor. It was first built on a workbench using components and jumpers for connections. A vttc is a vacuum tube tesla coil and it uses vacuum tubes valves for the oscillator that is self biasing from a grid leak circuit. Warning working with electricity is dangerous, all information found on my site is for educational purpose and i accept no responsibility for others actions using the information found on this site. Tesla coil music sail by awolnation high power duration. Solid state coil driver theory richies tesla coil web page. The above is a stylized schematic of the onetesla driver. His father, milutin tesla 18191879, was an eastern orthodox priest. Elihu thomson describes an experiment of the same kind.
Who doesnt like the electric glow of red hot filaments in strangely shaped glass vessels and a tesla coil that is creating nearly silent 3 foot swordlike sparks. I was surprised to get some good results from the first try, a good encouragement for higher power setups using gu81m or gmi90, which i also have. The second is a resonant air core transformer the tesla coil itself which steps up the voltage to the range of 200. The staccato driver is not shown in the above diagram, but i use dave sharpes design. First, decide on the power of the coil, and then obtain a transformer to vacuumtube tesla coils r. Vacuum tube tesla coil plans eastern voltage research. Dual 833a vacuum tube tesla coil high performance duration. It looks similar to the symbol for a vacuum tube diode, but it has an. My vacuum tube tesla coil circuit overview and construction. Notice he tells you exactly how many turns of wire to use for each coil, so im not sure what your question is. The secondary has a 200turns with of wire diameter of 1mm on a 11 cm. Aug 01, 2014 then you would understand how a solid state vacuum tube tesla coil would need to function. Dave sharpe and john freau on chip atkinsons tesla list have pioneered this method. Highfrequency induction, teslatype coil, with one end of secondary attached to a metal electrode point of leakage is indicated by a bright spot where discharge enters evacuated glass assembly can be used for exciting geissler tubes, but intended for intermittent use only, for periods of up to 4 minutes, followed by at least 5 minutes off.
Platecircuit impedance matching is a difficult concept to. In this case little current flows through the freewheel diodes if the driver is tuned to a frequency below the resonant frequency of the tesla coil, the load current changes direction before the dead time. Steve ward is a pioneer in the area of solid state tesla coils, and it is his design youre using. Im a tube nut, so i may be able to help you with designing a triode based. A tesla coil is a radio frequency oscillator that drives an aircore doubletuned resonant transformer to produce high voltages at low currents.
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