Original poster: "Scott Bogard" <teslas-intern@xxxxxxxxxxx> Gary and Jhowson,Yes you can indeed wire them in series, but not like MOTs, you have to somehow wire outputs to center tapped core (and get phasing correct). This is much easier said than done, and I have never (actually) tried it, but why bother, you can only coax 15KV at 23 mA, which is lower power than if they were wired in complete parallel, and you need 5 OBITs to do it in series. Not to mention, there is very thin wire in the secondaries, and they won't survive 15kV for long, wired in parallel they will live long happy lives (if used for reasonably short runs of course). I have only ever lost one OBIT during coil service, and it had a half short before it ever met my coil. There is a web page describing in detail how to wire them in series, but you'd be better off (almost always) to wire them in parallel, and I cannot seem to find it, otherwise I'd put a link up! Take care, and believe me when I say, a properly made coil can get 25 in+ sparks from 3 OBITs in parallel.
Scott Bogard.
From: "Tesla list" <tesla@xxxxxxxxxx> To: tesla@xxxxxxxxxx Subject: RE: Oil Burner transformers Date: Thu, 19 Apr 2007 20:29:25 -0600 Original poster: "Lau, Gary" <Gary.Lau@xxxxxx> Nope - there's no way possible to wire them in series. The steel cores are tied to the secondary midpoints, so each series-connected xfmr would have a 10kV differential between their cores. The primary-to-core insulation cannot tolerate that and would break down (since the primaries are tied together). Instead, wire them in parallel (all primaries in parallel, and all secondaries in parallel). You'll need to experiment with the phase, swapping either the pri or sec phasing to get maximum arc. You'll end up with a 10kV/69mA OBIT farm, with the same effective power as a series-connected 30kV/23mA configuration, but much easier to build a capacitor for. Regards, Gary Lau MA, USA > Original poster: jhowson4@xxxxxxxxxxx > > Hello > > I just got 3 > > 10KV 23ma oil burner transformers > > I was wondering if it was possible to connect them together to get a > total of 30KV if so how would this be done. I could get pics if need be. > > Many Thanks
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