
Most people who run coils begin with 120 volts @ 60 cycles. 
If this is the case with your anticipated power feed, then one of
your two feed lines will be a neutral wire (zero voltage), and a
slight circuit modification will be required. THIS CIRCUIT
SCHEMATIC IMPLIES 240 VOLT OPERATION THROUGHOUT, WHERE BOTH 60
CYCLE FEED LINES ARE HOT, AND, A HIGH VOLTAGE STEP UP TRANSFORMER
THAT DOES NOT HAVE A GROUNDED CENTER TAP. Those who start out
using 120 volt line feeds usually end up switching over to 240
volt operation in a hurry: the amperage requirements of Tesla
Coil power supplies makes 240 volt operation very desirable.  

However this ZIP package includes the specific instructions
required for safe, RF supressed operation when using 120 volt
feed lines, and/or, neon sign (grounded center tap) step up
transformers. Alternate wiring diagrams for these, and other,
modifications are provided in the following suppliments:
CHOKE.GIF & CHOKE.TXT, CHOKE1.GIF & CHOKE1.TXT, CHOKE1A.GIF &
CHOKE1A.TXT. When and where these alternate wiring diagrams are 
employed they will be referenced.    
---------------------------------------------------------------

Starting with the upper left hand corner of CIRCUIT.GIF, the 60
cycle line feed provides power to the circuit. These line feeds
are labled 60 Hz in the CIRCUIT.GIF schematic.
 
CP1 refers to Circuit Protection devices. This is a fuse, circuit
breaker, or fusable link. The current rating of the Circuit
Protection device is dependant upon the current rating of the
step up transformer (X1). I allow a 150 - 200% margin over the
transformer input current rating when using the plate value of
unmodified neon sign transformer(s) {transformer = xfmr or
xfrmr}. The text files in this packet contain precise
instructions for modifing neon sign xfmrs for high efficiency
Tesla power supplies. When using modified neons or other types of
step up xfmrs, then I allow a 35 - 50% margin over the plate
rated input current of X1.

SW1 refers to the power control switch(s). In the old days a
knife blade switch was common, but I prefer a remotely operated
power relay/contactor. When the sparks are flying I am hesitant
to grab hold of live switch: I like a remote operated relay with
a step down transformer and a low voltage switch. The choice is
yours...

Line Filter: These are pretty much self explanatory; except that
I run them in reverse. We are trying to prevent the RF generated 
from the apparatus from entering into the house wiring, not the
other way around, which is how these filters are designed. These
filters are generally marked on the case, just put the "LINE"
side facing towards the coil, the "LOAD" side faces the 60 cycle
breaker box. NOTE: alternate filter schematics are given and
described/debated in CHOKE.GIF and CHOKE.TXT in this packet.

VX1  This is a Variable Xfrmr, Variable Transformer, Powerstat,
Variac, Autotransformer, Autoxfrmr, etc.... Some type of
variable transformer used to control the input voltage to X1. The
current rating on the variable transformer should be matched to
the value of the Circuit Protection device.

Line Filter: see above.

X1  High voltage step up transformer. Typical types include Neon
Sign Xfrmrs, Potential Xfrmrs, Plate Xfrmrs, Pole Pigs (pole type
power distribution type xfrmrs). This is where circuit modifica-
tions may have to be made to the general diagram in CIRCUIT.GIF.
If you plan on using a neon sign xfrmr for X1, then plan on
modifing BC1 according to the layout given in CHOKE1A.GIF and
CHOKE1A.TXT. Precise values and layouts to protect neons and the
60 cycle line supply are given in these documents. Plate type,
pole type, or potential type xfmrs are protected according to the
layout given in CIRCUIT.GIF and CHOKE1.GIF, CHOKE1.TXT.

BC1 is the protective Bypass Capacitor. See the CHOKE documents
refered to in the above paragraph depending on transformer type.

RFC1, RFC2 are Radio Frequency Chokes: Values and construction
details are given in CHOKE.TXT, CHOKE1.TXT and CHOKE1A.TXT.

G1 is the main system spark gap. Please refer to AIRBLST.GIF &
AIRBLST.TXT or CYLNDR.GIF & CYLNDR.TXT for detailed construction
specifications and diagrams of these components.

C1 is the High voltage, plastic film, pulse rated, Tesla
capacitor. Refer to CAP.TXT for construction details of this
component. The general text files from OCT-93.TXT or NOV??-93.TXT
contain additional detailed information on these capacitors. See
TESLA.TXT for commercial sources of Tesla Capacitance.

L1 is the Tesla Tank primary coil. Construction details and
theory are extensively covered in the general text files (see the
OCT-93.TXT or NOV??-93.TXT)

L2 is the Tesla Secondary Coil. Construction details and theory
are covered extensively in the general text files. Specific
construction details for 200 KHz and 450 KHz coils are given in
the general texts included in this packet.

T1 is the discharge Terminal. Spheres have been traditonally
recommended, but TOROID discharge terminals give the last word in
Tesla coil performance. Again... The general text files give
complete descriptions and construction guides.

It should be noted that the RF GRND (Radio Frequency Ground) is a
dedicated Tesla ground: The core of X1 and all grounded compon-
ents on the coil side of X1; are grounded to a heavy, dedicated,
Rf grounding system. The general text files cover RF grounding
extensively. 

Other coil notes: In the event that X1 is not internally current
regulated (neons are internally regulated, the other types are
not) then some type of current limiting should be added (in
series) to the primary of X1 to prevent "brownouts" and
"blackouts" when you throw the switch. Pole types transformers in
particular are dangerous without some type of current limiting.
Details are given in the general text files included in this
packet.

Tesla Tank configurations (C1 - L1 - G1) are varied, and need not
conform with the layout given in CIRCUIT.GIF; see the layouts in
TANK.GIF, TANK1.GIF, & TANK2.GIF for the common variations. There
are no related text files for these GIFs, the variations being
pretty much self explanatory. The layout given in CIRCUIT.GIF
tends to be less brutal on X1 during operation.

