etp BD-10A Instructions Manual

4642 N. RAVENSWOOD, CHICAGO, ILLINOIS 60640-4510
TELEPHONE: 1-773-561-2349
FAX: 1-773-561-3130
Model BD-10A /BD-10AS HIGH FREQUENCY GENERATOR
PRODUCT NUMBER 11011 / 11031
INSTRUCTIONS
DESCRIPTION. The Model BD-10A and BD-10AS are hand-held units which
generate a high voltage at a high frequency. It is intended for intermittent use,
no more than 10 minutes at a time. It has an output of between 20,000 to
45,000 volts, at a frequency of approximately 500 kHz. When properly adjusted,
when the electrode is held within ¼ to 1 in. (6 to 25 mm) from a metal object, a
spark will jump to the metal. Current output of the spark is about 1 mA.
The Model BD-10AS (illustrated above) has a button on the side, which when
pressed turns on the high voltage side of the coil. When it is depressed, the high
voltage is turned off. The Model BD-10A does not have this feature.
Both models are a variation of the tesla coil. They have a primary coil which
produces an output voltage of about 1200 V at the input line frequency, 50 or 60
Hz. This output voltage is interrupted by a vibrating contact, energized by this
coil at twice the line frequency. The output voltage of this primary coil is
connected to capacitors, which are then discharged into a high voltage coil.
The capacitance, resistance and inductance of this circuit is designed to oscillate,
or ring, at a very high frequency, in this case 500 kHz. The output of this high
voltage coil is adjustable by varying the distance of the vibrating contacts, which
is user adjustable, by means of a knob on the end of the unit.
Applications include pinhole leak detection, as in the linings of tanks and other
similar metal objects, and in plastic welds, where a test metal backing is applied.
Other applications include ionizing a gas inside a lamp, neon sign, double-pane
insulated window, pharmaceutical vial, or similar glass vessel where a deep
vacuum is contained.
03/11