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Jon, The modern cheap import ones you see knocking about are generally not up to the job for a pole pig, without getting pretty hot during use. I melted and shorted the windings of one a while back while running @ 10.5kv / 400mA - (hardly pig output) simply because I left it running for several minutes (they normally have a thermal cutout to disconnect the mains input during normal use) Their duty cycle is very low sometimes, especially as Yurtle mentions, if Alu' conductor is used; also the resulting voltage drop from lossy windings gets multiplied up by the pig, so you could potentially be losing 0.5kv at the worst case. Winding your own ballast is a better option. Regards Phil Tuck www.hvtesla.com -----Original Message----- From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Yurtle Turtle via Tesla Sent: 30 July 2015 20:52 To: GENE GARRAGE; Tesla Coil Mailing List; Tesla Coil Mailing List Subject: Re: [TCML] Variable Ballast I got a 225 amp Lincoln welder at a garage sale.It was old enough to have copper windings. I chose to short the welding leads internally, and eliminate the cables. From: GENE GARRAGE via Tesla <tesla@xxxxxxxxxx> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> Sent: Wednesday, July 29, 2015 6:53 PM Subject: Re: [TCML] Variable Ballast From: Jon Danniken <danniken@xxxxxxxxxxx> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> Sent: Thursday, July 2, 2015 2:28 PM Subject: Re: [TCML] Variable Ballast On 07/01/2015 11:14 AM, Miles Mauldin wrote: > Do I need to find an old welder, or will an inexpensive new one work > just as well. Read many posts about shorting the secondary and using > the primary in line with a pole pig. Thoughts, ideas or suggestions > all wanted for a variable ballast. You can get an old 220V arc welder for cheap on craigslist if you are patient, less cheap if you are not patient. As a bonus, you also get a welder. Jon _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla