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Registered Member #48007
Joined: Wed Jun 18 2014, 01:00PM
Location: Prilep, Republic of Macedonia
Posts: 33
TeslaHighvoltMan wrote ...
Teodor Zafiroski wrote ...
Dr. Dark Current wrote ...
EDIT: Err... can be an OLTC made with a heavy duty relay or SCR as mentioned above? (just another silly idea on a simple TC really.)
I know that I'm about 8-9 years late, but about a year ago, this post inspired me to make this:
? I don't think, that YOU made this! Please don't talk bullshit. The teslacoil shown in your link is a small commercial Teslacoil, produced in the former German Democratic Republic and was used at nearly every school for physics demo. You can buy this coils often on Ebay, here for example:
They can be run with 25V AC or DC, what makes them not very dangerous and they use the same simple principle like violet wand machines. So please don't say that YOU built this device
Some parts were scavenged, my teacher gave me access to my school's basement and let me to scavenge for parts, I found the secondary, the primary, the stand and the relay there, I was told that the relay was used in the old vibrator psu's, but it resembles the one in the link, and has very durable contacts... But I think the relay also came from the pre-assembled coil. They were all in a pretty bad shape, dissasembled and in a pile of junk metal things and broken power electronics, they were to throw all the things in the junk, I scavenged quite a large quantity of heatsinks, transformers and also some of the parts of this Tesla col, which fitted in the screw holes quite nicely, but I thought it was a coincidence, because some of the holes in the relay didn't have corresponding holes in the stand. I had a rough Idea at what should I do (a relay self oscillating behaving as a regular spark gap, inspired by the above-mentioned post), assembled it and it worked on 15Vrms, but the spark was very small. Then I got the idea to run it on mains voltage (230V), but after realizing that the impedance of the circuit is very small, I had to place a in decade scent lamp in series to limit the current. The result was poor, and was not a huge improvement. Then, because the light from the light bulb bothered me a lot (I was using a 150W light bulb at that time), I wanted to replace it with another current limiting device, and the first to come at my mind was a magnetic lamp ballast. I tried it with the coil and with a little bit of tuning, reducing the turns count to only 2, I was able to get superb results regarding the 25W input. I have also tried it with a 40W ballast and not much improvement was noticed. At that time, because of the lossy, non-varnished coil, I got some sparkovers and tracking problems because some turns were overlapping, so I decided to rewind the coil. There was a major improvement to the streamer length, I was satisfied with the result this coil gave at such low powers, and because the relay contacts got red hot in minutes when increasing the power input, I decided to scavenge the whole thing and go on to higher power coils. That's the story of this coil...
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SSTC=Super Simple Tesla Coil?
or SCR as mentioned above? (just another silly idea on a simple TC really.)
