On 1/2/13 6:58 PM, Andy Cobaugh wrote:
On 2013-01-02 at 17:17, Jim Lux ( jimlux@xxxxxxxxxxxxx ) said:the "500 ft spool of wire" as an inductor has some simplicity and appeal.. I can't recall what it's inductance is, but it's on the list. (copper being expensive these days, it's not as cheap as other means)I think the 500ft spools of #12 THHN stranded copper measure around 9mH. The mostly complete spool that I use with my potential transformers measures 8.5mH.
9mH = 3.4 ohms at 60 Hz, 2.8 @ 50 1 spool = 35 Amps at 120 V, 60 Hz _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla