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Re: [TCML] DC coils
When I added the RQ gap in series with the RSG the output went up. I need
to tune the coil and then see what the gap arrangement works best. I am so
happy at this point with the coil, however I'll get back to it soon and
will report back. Steve you may be the very one that got me to go the dc
route. I knew I read about it on the form years ago. There is so much
going for the dc system, as I see it my Tesla coil interest has peaked once
again. I got some what side tracked by building a two tower Max generator
and have been having great results with it as well. I have started
building a full size laser harp. Have the wood work about done and then
will get into the electronics. Too many projects and not enough time. As
I grow older I still can do about the same amount of work but it just takes
more time. Lots of fun anyway. Cheers, Charles
On Thu, Jan 3, 2013 at 7:15 PM, Steve <youngster@xxxxxxxxx> wrote:
> Charles,
>
> Congratulations! I think you and Jay Howson may be the only other ones in
> the world currently using this method, at least the only ones reporting
> success with this method on this forum. I reported using this method years
> ago with great success, but I have since moved on to tamer hobbies
> (building
> virtual pipe organs).
>
> Charles, I am curious why you included the RQ spark gap in series with the
> discharge side of your rotary spark gap? My setup used only a RSG as you
> describe below and it worked great (8 foot streamers). What difference do
> you see with and without the additional static spark gap?
>
> Happy new year,
> --Steve Young
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of charles rakes
> Sent: Wednesday, January 02, 2013 10:53 PM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] DC coils
>
> I can recommend using a dc version with a rotary gap that charges the
> capacitors and then discharge through the rotary and fixed gap. This way
> the power supply is never connected to the primary coil. This system
> requires no transformer protection and works great. I first read about
> this method here several years ago and gave it a try but at the time I
> didn't get it right. December 31, 2012 was the best Tesla coil day I've
> ever experienced in all the many years that I've been playing with Tesla
> coil circuits. I finally got the dc coil working like I believe it
> should. I'm using a 5800v 330ma heavy plate supply with one side of the
> secondary grounded and the other side feeding a positive 8kv and -8kv
> output supply. My rsg is a simple one. Two contacts connected together on
> the rotor and four stationary contacts. In series I'm using a RQ spark
> gap. The primary has 15 turns of thin flat 3-inch copper material. The
> secondary has about an 18-inch long by 4.5 dia winding of number 28 wire.
> Top loaded with an 18x4-inch toroid. The first run was producing over two
> ft of spark. And I had not done any tuning. Did have a good idea where
> to start with the primary tap. I let it set over night and it hit me that
> I should have added a choke in between the power supply and spark gap.
> Oh boy what joy! It was shooting sparks out in every direction with well
> over 3 ft. I don't know how long the strikes might have gone because they
> were hitting objects in all direction. I'm waiting for a nice warm night
> so I can move it out doors and really tune it and see what it can do. Also
> might need a larger toroid.
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