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RE: [TCML] can you connect the secondary *directly* to the primary?
If you connect the base of the secondary to the inside primary primary, you have an Oudin coil. Yes, it does work like an auto transformer. Yes, it still has to be grounded to get any real performance out of it, otherwise it has to ground through your input transformer (not good). Perhaps there is something else wrong with your circuit that it is not making sparks, what are your exact specs?
> Date: Wed, 14 Nov 2007 21:06:30 -0800
> From: btmeehan@xxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: [TCML] can you connect the secondary *directly* to the primary?
> I sort of already know the answer to the question, but since I am pretty new
> to the tesla coil hobby I figured that I'd ask to learn about everything
> that was wrong with my idea.
> When I first saw the circuit for the tesla coil primary and secondary - I
> thought that it bore some similarities to an autotransformer or an
> automotive ignition coil. So I figured that I might get it to work if I
> connected the base of the secondary to one side of the primary circuit.
> (This might not suprise you, but it didn't work - no matter how much I
> wanted it to.)
> I started to look at the schematics on many websites and noticed that all of
> the secondaries were connected to an earth ground. I wasn't near my coil to
> try to move the connection to an earth ground, but that will be the first
> thing that I try ... but will it not work as an autotransformer because the
> coupling is too weak?
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