For the possible replicators in europe, here are the dimensions in metric mm.
Outertube:
Length : 152,4 mm (6 inches)
Outer diameter : 25,4 mm (1 inche)
Wall thickness : 0,9 mm ( .035 inche)
Innertube : 177,8 mm (7 inches)
Outer diameter : 19,1 mm (3/4 inche)
Wall thickness : 1,7 mm (.065 inche)
technical grade: ASTM A213 or ASME SA-213 (316 seamless?)
The top of the tubes are cut in an angle.
The bottum plug or bolt in the innertube must have a bolt surface, pointing into the innertube.
Ok, then you have to put a welder on the tubes to set the internal magnetic fields of both tubes in the same direction.
Tuning is done with help of an musik instrument tuner or a PC.
Hang the tube up and hit it with a stick of wood.
The outertube is 1 octave lower........
? I could not hear good what FF said on this.
He tested the innertube and got a 193.5hz. So ill gues he needs a 96.7hz for the outertube.
The innertube dictates the frequency of this all. You tune at the end the pwm on the frequency of the innertube.
The innertube = negative
The outertube = positive