Adafruit 4269 Simple Spring Antenna - 915MHz

welcome to the tutorial to wind the 868 makers Lauren terrifying a design we published online by Fabian Ferreira what you need is a one point four millimeter piece of thick welding wire with copper coating pliers a marker any kind of a rod of the appropriate diameter for winding the loops and a ruler to measure distances so what we'll start is firstly measuring the bottom end of the antenna which has the distance of 174 millimeters however at this point we'll leave this to be a bit longer so we'll say 18 centimeters 118 millimeters at this point we'll use the pliers to do a 90 degree turn in the wire and we simply do a nice three turn of the source then we will take a rod of the appropriate diameter so for this wire specifically to get a 20 millimeter outer diameter of the loop we need 21 millimeters that rod and that you determine experimentally simply take the wire we have widened a f