My Old Tesla Coils

Little Dave

Variac	General Radio 120v 4.5A
Bus Wiring	#12 AWG, solid copper wire
High Voltage Supply	12Kv, 30mA NST
Safty Gap	N/A
Chokes	N/A
Spark Gap	Combo - copper pipe/bolt gap, 2 series gaps
Caps	6 bottle caps .006湩
Primary	4.5" di., #12 wire, .25" spacing, 13 turns,
Secondary	1.25" X 14", #28 magnet wire wrapped on cardboard tube
Discharge Terminal	5" Hard drive platter
Ground System	10' of #3/0 AWG connected to drain pipe in basment
Max spark to date	11" average into air
Reason for disuse	Transformer sold

Dave

Variac	General Radio 120v 4.5A
High Voltage Transformer(s)	12Kv, 30mA NST
Safty Gap	single - bolt type
Spark Gap	4 gaps with a total of .2" gap
Caps	6 bottle caps .006uF
Primary	10.3" di., #12 wire, .25" spacing, 13 turns
Secondary	4.5" X 20", #24 magnet wire wrapped on PVC
Discharge Terminal	copper telephone bells
Ground System	6 strands of #12 cable braided together & connected to drain pipe in basment
Max spark to date	20" average into air
Reason for disuse	Torn down and secondary sold