The Turn Of The Century Electrotherapy
4" Capacity Induction Apparatus...
...Powering a Tesla Coil!
4" Induction Apparatus operating on its own.
A series spark gap is now placed in parallel with the induction coil output, and a Tesla Coil with a condenser in series is then added.
The Tesla / Oudin Coil is wound on a 2.375" OD form - 25 turns of 18 AWG wire and 750 turns of 34 AWG. The secondary
winding is only 5" tall.
Produces a discharge 4" or so in length.
Though this induction coil will spark 4", when a condenser circuit it can only be used to charge smaller condenser - .002 mfd is
used for these tests.