I got my wire data table book out and had a look.
The enamelled wire Alex is referring to is on page 56 of the April
Maplin Catalogue. The order code is:YN83E and costs £3.99.
In the wire table book it gives in imperial units a length to weight
140 Yards per pound
Converting to metric:
0.282 meters per gram
So a 250g reel will have 70.48 meters on it.
22swg enamelled wire has a turns per inch value of 33, so a 50" length
have a total of 1650 turns close wound.
If the coil diameter is 8" (20.32cm), then the circumference will be pi
* 20.32cm =
So the total wire length = number of turns * coil circumference:
1650 * 63.84cm = 1053.36 meters
That's 1053.36 / 70.48 = 15 reels or £60.00.
You would need a 4kg reel.
But someone else may want to check my calculations first.
Tesla List wrote:
> Original Poster: "Alexander Rice" <alexjrice-at-hotmail-dot-com>
> To - anyone who lives in the uk,
> if you live in the uk
> have heard of a largely mail order electronics supplier called
maplins, if you
> have a catalogue look up the enamel wire section, they sell 250g reels
> enamel copper 22 swg wire, which they reckon is about 1.5 Km i.e -
> wind an 8" * 50" coil for arounf £5, that's cheap... or wrong, does
> how much 1m of copper wire weighs? or knows the density of copper?