When the vacuum electrode is placed in contact with the patient it will light up with a violet color the same as it would if attached to a high-frequency apparatus, but the sensation produced in the patient is entirely different, being of a vibratory character; it is, in fact, when used in this way in conjunction with a static machine simply a method of applying the wave-current by means of vacuum electrodes. This current has a certain therapeutic value, but should not be called a high-frequency current. It will be referred to as vibratory current (Figs. 329 and 330).
One very simple test to demonstrate physically the difference between this current and either form of high-frequency current is to have the subject come in contact with the metal part which holds the vacuum electrode. When this is connected with the static machine as above described, you will experience a very disagreeable shock, whereas, when it is connected with a high-frequency current no sensation other than that of having a slight feeling of warmth will be experienced. Vacuum electrodes are used in this same way with an induction-coil, the strength of current being regulated by the distance A and B are separated.







I wonder if I can tune my coils better if I wear my tinfoil helmet while I do it.
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