Only one pulser has been made, and that is for use on 240 volts, 50 Hz.
 
For 110 volts you would probably do better to generate the charging
current from a transformer, because if you doubled the number of diodes
and capacitors in the ladder network you would also have to double the
capacitor value to maintain the same charging time.
 
The 1M0 resistors are to ensure that the voltage is shared equally
between the capacitors and the trigger diodes.  The 100pF capacitors may
not be necessary, but they help to share the voltage and remove small
voltage variations across the trigger devices (surge arrestors).
 
I soldered some 10 gauge 4 inch long copper wires to each electrode of
the surge arrestors to conduct heat away.  With a pulse every four
seconds the arrestors would otherwise get somewhat hot.
 
The 1k0 resistors have 850 volts each across them at the instant of
firing, so they need to be of 2W or greater power rating.  Their purpose
is to isolate the charging circuit from the rest so that the transient
when the pulse is produced does not damage the charging diodes or
capacitors.
 
Because the coil has 1700 volts across it at firing it might be a good
idea to wind it in layers with a layer of insulating tape between each
layer of winding.  Mechanical movement might otherwise degrade the
enamel insulation and lead to short circuits between turns.
 
2.5 mH produced about 800Hz resonance,  0.5 mH produced about 1500 Hz.
 
Both coils can throw a 3mm thick, 2 inch diameter aluminum disc 8 feet
in the air, and a mild shock can be induced in the hand without contact
with the coil.
 
No guarantees with the circuit, but it worked for me.  Take care and
remember it can store 1700 volts for a long time if the resistors fail,
and the patient could get 1700 volts if a coil lead comes loose...
 
I don't know if it is powerful enough to have an effect on tumors like
the Pappas device and others, but it certainly ought to do much more
than Bob Beck's pulser because there is no flash tube to absorb power
and the device is resonant at useful Rife frequencies.
 
If you connect a Rife tube to the coil there is a brilliant flash from
the tube, but I don't know whether that would produce any effects on
people even though the light must be modulated at twice the resonant
frequency.
 
I wonder what would happen if the coil were to be connected to
conducting pads either side of a prominent tumor.  Could be very
dangerous, but on the other hand the damped wave is only there for a few
milliseconds.
 
Best wishes,
 
Bob
 

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