The Big Tesla coil is 56" tall with a base that is 24" on a side.
The 8"x31" secondary is PVC wound with #20 magnet wire.
The flat-spiral primary is rg-214 silver braid coax, tuned by poking
in a sharp copper contact.
The spark gap is a dual-copper pipe static gap that is vacuum quenched
with a shopvac.
The cap is a 0.02 uF @45 KV Maxwell.
The toroid is 5.5" x 20" from ross engineering.
The power supply is four 15KV / 60 mA FranceFormer Neon Sign Transformers
in parallel.
The base is connected to an 8' ground rod using a thick copper jumper
cable.
The sparks are about 80" long, which should be about 1.5 million volts.