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Registered Member #2037
Joined: Fri Mar 20 2009, 09:48AM
Location:
Posts: 1
Hi, Am Tareef, me and my friends were interested in building a Tesla Coil, and so we did one, but actually after we finished assembling and fixing the parts together we noticed that while we were testing it, the sparks only came out from the spark gap, and nothing came out from the toroid, we spent hours trying to know why that happened but we reached to nothing so for that am asking you if you can help us by giving us an advise. by the way i will provide you with some videos, so it can be easier for you to know whats happeneing.
The First Video Shows All The Wiring We Made (( ))
The Second Video Shows Whats Happening With Us (( ))
note: you will notice that in the wiring video that the is a copper coil on the ground, actually we put id there and we connected it with a wire for grounding, and that wire is connected to a steel pipes used for the fire fighting in our building. hope the information which i gave to you is enough.
Registered Member #1739
Joined: Fri Oct 03 2008, 10:05AM
Location: Moscow, Russia
Posts: 261
Pretty neat assembly. As for the lack of sparks, there can be simply anything - mistuning, secondary damage or an improper connection somewhere. Post a schematic of your work so it would be more clear.
please give us also some informations about your coil like capacitor(voltage, capacity), secondary(length, wire used) multi spark gap or single an such things
Registered Member #480
Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
Tareef -
You have assembled a very carefully made and nice looking coil. It should be relatively easy to get it running, especially if you are getting constant sparking at the primary spark gap, and little or no sparking at your safety gaps.
First and foremost, what are the resonant frequencies of the primary and secondary circuits, and how did you determine these frequencies: via calculation (physical dimensions), or via direct measurement (with electronic test equipment)?
Unless you have some fundamental error in the wiring, your problem is most likely related to mis-tuning (a mismatch between the resonant frequencies of the primary and secondary circuits).
Did you use some Tesla-coil design software (JAVATC, WinTesla, etc) to calculate all your coil's parameters? If so, please post all the design data.
If you did not use any design aid, please provide the following information: 1. Value of tank capacitor, and voltage rating and resistance value of bleeder resistors, if you used them (can't see any in the vid clip); 2. Primary coil characteristics: conductor diameter, number of turns, inner diameter, height of primary relative to the lowest turn on the secondary coil; 3. Secondary coil characteristics: coil form diameter, winding length, wire gage (or wire diameter); 4. Topload chracteristics: diameter and height of toroid (or oblate spheroid, if that's what it is), height of center of topload above top turn of secondary coil; 5. Voltage and current rating of HV transformer; 6. Gap width of your single-segment primary spark gap; 7. Total length of all the interconnecting wiring in the primary circuit; 8. Value of each of the components in your R-C low-pass filter array ("Terry filter"): resistors, MOVs, and bypass capacitors;
Once all this information is provided, it should be relatively easy to determine what's wrong, and what is needed to get the coil operational.
Registered Member #1083
Joined: Mon Oct 29 2007, 06:16PM
Location: Upland, California
Posts: 256
Try using a break out point on your toroid. I've found that smooth toroids don't break out as easily if your coil is not well tuned. With a break out point, there will usually be at least some tiny sparks. Also, try holding a fluorescent bulb near the top when you run it. That way you can see if there is any power being transferred to the secondary at all.
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