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Topic: Spark gap


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  YouTube - 1921 Spark Gap Transmitter / Ham Radio
There is even a key and spark gap that museum visitors can interact with.
This is an operating reproduction exhibit I built of a 1921 spark gap transmitter used by Amateur Radio operator John Westcott, W8AGA.
It was built for a house museum where John once lived and operated his transmitter, but the museum reneged on its agreement with the radio club and the exhibit was never installed.
www.youtube.com /watch?v=6ybYxkt3UxU   (570 words)

  
  Trigger apparatus for spark gap dischargers - Patent 5465030
An improved means for triggering high voltage spark gap devices for current injection and pulse power applications which utilizes the high voltage source itself to trigger the discharge.
When the spark gap is to be switched, a trigger pulse is applied between the trigger electrode and the dome electrode through which it protrudes.
When the spark gap discharge tube 12 is to be switched, a potential difference must be applied between the trigger electrode 20 and the primary electrode 14, thereby creating a spark which serves to break down or ionize the gas within the tube.
www.freepatentsonline.com /5465030.html   (1183 words)

  
  Spark-gap transmitter - Wikipedia, the free encyclopedia
Spark gap oscillators are still used to generate high frequency high voltage to initiate welding arcs in gas tungsten arc welding.
The function of the spark gap is to present initially a high resistance to the circuit to allow the capacitor to charge.
A synchronous gap was driven by a synchronous AC motor so that it ran at a fixed speed, and the gap fired in direct relation to the waveform of the A.C. line that recharged the tank capacitor.
en.wikipedia.org /wiki/Spark-gap_transmitter   (1661 words)

  
 Tesla Coil Spark Gap Technology
Spark gaps are the "brain" of the Tesla Coil.
The rotary gap is a mechanical spark gap usually consisting of revolving disk with electrodes mounted on the rim.
A synchronous gap runs at a fixed speed and is constructed so that the gap fires in direct relation to the 60 cycle waveform of the line feed to the capacitors.
home.earthlink.net /~drestinblack/sparkgap.htm   (1861 words)

  
 AM Tower Spark Gap Settings   (Site not responding. Last check: )
The tower spark gap is the most critical defense against voltage transient damage to the transmitter via the antenna.
The spark gap needs to be adjusted to handle the voltage peaks of the carrier with full positive modulation which can be as high as 125%.
An alternative way to set the gap is to bring the arrester balls (spark gap) on the tower together with the transmitter at full power and full modulation until the VSWR trip occurs, and then open the gap up by an additional 0.01 inch.
www.lpbinc.com /TechSupport/Omni/Whitepapers/TowerSparkGap.html   (481 words)

  
 Spark Transmitter
The not wanted gap across the antenna terminals was eliminated by Braun, who in 1898 patented a circuit in which the spark gap was in a separate primary circuit in series with an appropriate coil and condenser.
The spark rate was 750 sparks/second, which could have been derived using a 3-phase AC generator, and the rotary spark gaps arranged to fire on both positive and negative peaks of the 3-phase waveform.
To send messages in Morse code using a Spark Gap transmitter it is necessary to employ a moderately high spark rate, high compared with the speed in sending the Morse letters, and high enough to produce a musical tone in the ears of the listener, clearly distinguishable from interference and atmospheric noise.
www.hammondmuseumofradio.org /spark.html   (2799 words)

  
 Spark Gap Introduct - GLVAC
Spark Gap is discharge component which uses cold cathode gaseous discharge principle, which does not need to heat up electrical source, no warm-up time, brief application circuitry, small size and firm, easier installation, width working temperature and voltage range, quick pulse rising time such advantages.
The gap between the main electrode is called main gap, the gap of the cathode and the trigger pole is called trigger gap.
Gas-filled Spark Gap is filled with the gas, p*d(p means gas-filled pressure, d means main gap) value is on the right of F.Paschen curvilinear, working voltage increase with p*d value, the ionization of inspire and impact is the main mechanism of discharge Hi-Pot.
www.glvac.cn /en/products/SparkGap/index.htm   (391 words)

  
 A 'Quenched' Spark Gap of Unknown Make, from a spark gap transmitter.
The function of the spark gap itself is to present a high resistance to the circuit to allow the condenser to charge.
The rotary gap was fitted to end of the transmitter's AC generator supplying primary voltage to the spark transmitter.
On larger transmitters, the gap is equipped with a blower.
www.telegraph-office.com /pages/quenched_gap.html   (955 words)

  
 Spark gap - HvWiki
A spark gap is two (or sometimes more) electrodes that are designed to have a spark jump between them.
When a spark gap is connected into a LC circuit (capacitor and inductor in series) and provision is made for charging the capacitor, strange and wonderful things happen.
A spark gap where the electrodes are cooled, and ionized gases swept away, by a blast of high pressure air.
wiki.4hv.org /index.php?title=Spark_gap&redirect=no   (956 words)

  
 Radio FAQ Part 1 — Spark and Crystal Radios
If instead, you are using a portable spark transmitter, run off an automobile spark coil, where the pulses are formed from a buzzer that starts and stops the pulses on the primary side of the spark coil, the spark frequency is controlled by the buzzer.
One of the trans—atlantic spark stations used a bank of 100 champagne bottles filled with salt water, standing in metal sleeves in a salt water bath with the glass of the bottles acting as the capacitor.
Instead, the spark gap was supplied with pulses formed by pulsing DC through a spark coil like that of an automobile spark coil, (Model T spark coils were VERY popular with radio amateurs.) 12V went in, and 10,000 V came out.
homepage.mac.com /msb/163x/faqs/radio-spark-crystal.html   (2803 words)

  
 Adventures in CyberSound: The Sounds of a Spark Transmitter: Telegraphy and Telephony
Eventually the Marconi spark transmitter was replaced by the Fessenden / Ernst Alexanderson (1878 - 1975) HF alternator, which in turn was replaced by vacuum tube transmitters.
The not wanted gap across the antenna terminals was eliminated by Karl Braun, (1850 - 1918) who in 1898 patented a circuit in which the spark gap was in a separate primary circuit in series with an appropriate coil and condenser.
For our spark transmitter some other form of coupling was responsible for the secondary peak, the frequency of which depended on the coupling (number of turns for the coupling coil), and the phasing.
www.acmi.net.au /AIC/SPARK_SOUNDS.html   (2329 words)

  
 Spark Gaps
Make special note that the return or "grounded" side of the spark gap must be returned to chassis ground and the use of connector types with 360 degree shielding is highly beneficial.
It is a good idea to make sure that the spark gaps on boards that are flow soldered are covered over with silicone mask to prevent bridging during the solder process.
It is essential that the spark gaps be located in a place where there is free air space in the gap area.
www.carouseldesign.com /SparkGap.html   (914 words)

  
 Spark Plugs
All of this is because the greater the gap and the higher the voltage requirement to jump the gap.
In identical spark plugs, the differences from one heat range to the next is the ability to remove approximately 70°C to 100°C from the combustion chamber.
You see, the larger the spark kernel that is generated by the spark jumping the electrode gap, the more complete burn, the better power and efficiency and the smoother the car will run for longer periods of time.
www.centuryperformance.com /spark.asp   (4117 words)

  
 TCsparkgap
The spark gap is a make or break part of a Tesla Coil, it is what times the pulses of power from the capacitors, and a poorly tuned SG will lead to a poorly working Tesla coil.
There are several types of spark gaps employed by Tesla coilers, single static, multiple static, synchronous and asynchronous rotary, and other stuff way to fancy to mention here.
When the voltage potential is high enough in the capacitors, the energy is discharged in the gap, so in theory (and only in theory), it only discharges when the caps are fully charged.
www.personal.psu.edu /users/s/d/sdb229/TCsparkgap.html   (464 words)

  
 Tesla Coil Static Spark Gap
This was my first main spark gap, using 2" copper sweat couplings and connectors made from 1/2" copper bar stock.
It looks nice, but the gaps were rather difficult to set and I have gone to a different design.
It's a little hard to tell from the meters, but the gap is handling 1600 watts of power (a few sparks are just visible between the copper electrodes).
users.tm.net /lapointe/SparkGap.htm   (624 words)

  
 Technical Tips : Spark Plug Gap
A gap that is too small means that the spark duration will be very quick and the spark will be thin and weak.
If the gap is set too large, the ignition system will not be able to cope with the demands and a misfire situation will occur.
Some wide gap spark plugs have a longer ground electrode to accommodate a wide gap setting.
www.ngkntk.co.uk /technicaltips/sparkpluggap.asp   (137 words)

  
 Static spark gap analysis
The static spark gap is the simplest type of spark gap for Tesla Coil use.
It should be realised that if the spark gap is set to fire at a voltage in excess of the peak capacitor voltage, no power will be processed into sparks, but considerable supply cord current can be drawn in order to charge the tank capacitor to the alternate peaks of the HV supply voltage.
A spark gap divided into several gaps is referred to as a series static gap, and often uses between 4 and 10 small gaps connected in series.
www.richieburnett.co.uk /static.html   (2654 words)

  
 Spark - Gap That Matters   (Site not responding. Last check: )
That is to say that when the pipe is working and the motor is "on the pipe" the compression will be high enough to stifle a wide gap (or even normal gap plug).
This makes for an engine that sounds rich and blubbery, though in fact it is running poorly because the spark cannot jump the gap and ignite the incoming charge under pressure.
Closing the gap a couple of thousandths can make a (big) difference and in my case is indicated.
www.macdizzy.com /spark.htm   (533 words)

  
 Spark gap
All the component parts for the gap were bought from RS (Electro mail).
The disk and base are made of 10mm Tuffnol, all the stationary supports are made of 18mm Brass bar and the electrodes are made of 6mm Brass studding.
Below are a few photos of the burned ends of the rotary gap electrodes after they had been used at this years Teslathon in Corby.
freespace.virgin.net /michael.tucknott/sparkgap.htm   (351 words)

  
 Wireless Transmitters
Professor Righi of Bologna improved the Hertz resonator by replacing the small spark gap with thin bands of quicksilver, as used for mirrors, divided in half by cross lines lightly traced with a diamond.
From left to right, the self-excited alternator, spark gap, power transformer and oscillation transformer are integrally mounted and enclosed by the micarta streamline casing seen at the right.
Extra rotary electrodes for the spark gap for changing the spark frequency are seen at the extreme left.
www.sparkmuseum.com /SPKTRAN.HTM   (552 words)

  
 The Spark Gap: Newsletter Published Meridian Amateur Radio Club
The Spark Gap transmitter, first demonstrated by David Edward Hughes in 1879, was one of the early forms of generating electromagnetic radio waves.
My Dad (W5MAV) used a spark gap transmitter and a crystal detector receiver when he was the radio operator on a coastal tanker back in the twenties.
He was able to acquire an old 1912 spark gap signal receiver when they were replaced with the tube type equipment, and it is still in almost perfect condition.
www.strato.net /~mcarc/sparkgap/index.htm   (291 words)

  
 Specialty Spark Plugs
Ignition occurs in a modern automobile when an arc is struck and current flows between the electrodes of a spark plug, or when current migrates across the conductive medium in a surface gap plug.
That is, by doubling the required arc-over voltage, you double the instantaneous peak spark power, and the higher the spark power, the better the ignition.
Surface gap plugs, which provide a solid-state medium for the electrons to migrate across, generally allow electron flow, regardless of spark voltage.
www.se-r.net /engine/specialty_spark_plugs.html   (1233 words)

  
 Spark Gap Experiments
This stored energy is discharged through a large spark gap with a gap width of approximately 3/4", as shown.
The circuit is completed by connecting the Carbon/Graphite - Thoriated Tungsten spark gap rods and the Tesla-like transformer T1 to the base of the Leyden Jars.
The bottom line is that there is MORE energy charging up capacitor C1 with the spark gap than without, and the greater the primary inductance, the greater the amount of energy that is collected.
www.intalek.com /Index/Projects/SparkGapExp/SparkGapExp.htm   (504 words)

  
 SPARK PLUG GAP? - Corvette Forum
At elevated rpm and higher cylinder pressures, the spark can be inhibited from bridging a larger gap, resulting in misfiring.
Yeah the theory was the larger gap would make the spark longer thus igniting mixture better and its true.
The problem is it increases the resistance for the spark to ground on the ground electrode on the plug.
forums.corvetteforum.com /showthread.php?t=744092   (716 words)

  
 spark gap definition - Dictionary - MSN Encarta
spark gap definition - Dictionary - MSN Encarta
Search for "spark gap" in all of MSN Encarta
the gap between electrodes of a spark plug in an internal combustion engine
encarta.msn.com /encnet/features/dictionary/DictionaryResults.aspx?refid=1861711156   (93 words)

  
 Fine Tuning Spark Plug Gap
Yes and no. A spark plug part number might fit hundreds of engines, and although the factory will typically set gap to a pre-selected setting, this gap may not be the right one for your particular engine, and may not take into account modifications that you may have performed to the engine.
Too much gap can result in a higher rate of misfires, noticeable loss of power, plug fouling, and poor economy.
Further experimentation may be necessary, but by always starting with a larger gap than it thought necessary to reduce the risk of detonation, you should be safe.
www.nightrider.com /biketech/tech_spark_plug_gap.htm   (318 words)

  
 TiC MR-head magnetic shield dummy shield spark gap (US6081409)
Alternatively, conductive spark gap devices are electrically coupled to sensor element leads and to each magnetic shield.
Each spark gap device is brought within very close proximity of the substrate to provide an alternative path for charge that builds up between the sensor element and the substrate to be discharged.
The ends of the spark gaps that are brought into close proximity of the substrate are preferably configured with high electric field density inducing structures which reduce the voltage required to cause a sparkover between the spark gap device and the substrate.
www.delphion.com /details?pn=US06081409__   (396 words)

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