I was talking to Dom M1KTA and discovered he had found some coloured
copper wire while browsing a local craft shop with his wife. This stuff is
sold for stringing beads etc.but is also ideal for winding multi winding
toroids. I got some yesterday and tried it out for both tinning and
insulating properties.
Tinning was very easy, it seems to be covered in the sort of enamel that
just burns off with the heat of the solder and tins easily . (I used 60/40
lead tin resin cored stuff). I then tightly wound two six inch lengths
together using a drill until I got 7 turns/inch then separated the tinned
ends and checked for shorts. Nothing...it was open circuit, a good sign..
Bought it at my local branch of
Craft Central
It comes in several colours on cotton reels with 24 yards per reel, and the gauge is 28,
The diameter I measured at 0.125" ( 0.032mm) which is approx 30 SWG. Price
is £1.25/reel. Seems to be supplied by Impex Creative Crafts, Atlas Road.
Wembley Middx. HA9 0TX
Craft Central also sell similarly coloured wire but in 15 metre coils and
0.5mm dia. (0.0195") I measured this as 0.57mm so it is close to 24 SWG.
Pack is marked Scientific Wire Company. Costs £1.99/pack) Did the same test
and got the same results.
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