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Registered Member #2838
Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
"Tesla coil circuits were used commercially in sparkgap radio transmitters for wireless telegraphy until the 1920s,[1][2][3] and in electrotherapy and pseudomedical devices such as violet ray. Today their main use is entertainment"
Registered Member #3766
Joined: Sun Mar 20 2011, 05:39AM
Location:
Posts: 624
Yea, I have a feeling that there would be a black vn in my driveway pretty quickly if I started broadcasting with lightning shooting off my roof...
I always wonder what the would would have been like if he had been allowed to finish wardenclyffe... I think I saw something that says that the electrical field increases exponentially relative to the size of the coil... and he was powering things over a mile in Colorado...
Registered Member #2838
Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
Keep in mind that tesla considered a coil producing arcs to be innefficient and a waist of electricity. He only produced arcs with is coils for experimentation and show. For wireless power transmission there would likely have been no arcs present.
Registered Member #3766
Joined: Sun Mar 20 2011, 05:39AM
Location:
Posts: 624
Dr. Spark wrote ...
Goodchild wrote ...
Tesla coils are good for one thing and one thing only, pure awesomeness, plain and simple.
They make great bug zappers. In addition, a good test bench for HV zaps. Goodchild hit it right on the $ indeed! They are a great hobby allowing you to express your building skills and to share the hobby with friends. Always look forward to the thons each year excited to see what wonders are brought @ .
Dr. Spark
Wow, 2 wind primary, 180 degrees out of phase, and good enough to look at without even being on... now how to audio-modulate that... *ponder....
Registered Member #3505
Joined: Sun Dec 12 2010, 06:03AM
Location: Albuquerque NM
Posts: 108
I always thought it would be interesting to use a high power laser to ionize a trail for the electrical discharge of the TC. Then figure out a way of using the laser to gather data on the material of an object then change the frequency of the electrical discharge to the resonance frequency of the material. You'd end up with a sweet Electro-laser for some zombie exploding.
Registered Member #3595
Joined: Mon Jan 10 2011, 04:46AM
Location:
Posts: 26
magnet18 wrote ...
I know they can be audio-modulated, why is it that the large ones never have good sound quality?
It is difficult to control that much power precisely... High power devices like some of the larger coils need to be operating within strict conditions to avoid disastrous failures...
Most of the larger coils (almost all DRSSTCs) require an interrupter circuit to work (it prevents the resonant primary circuit from ringing up to unmanageable power levels). This interrupter circuit usually operates within the audible range, so attempting to play high def audio over this is basically pointless as the interrupter-modulating arcing drowns out everything. The way most DRSSTCs are audio modulated is to make the interrupter BE the audio frequency, but this means the audio quality is terrible (coil is only capable of playing square wave monopohonic sound)
Plus the high power arcs create a ton of noise on their own that tends to drown out most things!
With smaller coils, the arcs are less fierce and quieter meaning less background noise and modulation schemes like PWM and FM are much easier to implement at those power levels.
If you want really good audio quality your options are limited to low power coils and stable-arc plasma speakers. Trying to make a high def multi-kilowatt tesla coil is like trying to play mozart with cannons - not really the right tool!
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Uses for a Tesla Coil?
