What is the primary difficulty encountered when operating neon tubing at high frequency?
High frequency operation significantly increases the detrimental effects of capacitive coupling in a given neon display. What is capacitive coupling? Any two electrical conductors electrically insulated from each other exhibit a property called capacitance between each other. When an AC voltage is applied between these conductors an electric field electrically couples the conductors even though they are insulated from each other. This coupling effectively allows an electrical current to flow from one conductor to the other[1]. The larger the AC voltage, the more current will flow. The higher the frequency of the AC voltage, the more current will flow. Also, the larger the value of capacitance between the conductors, the more current will flow. Several factors affect the value of the capacitance between these two conductors: 1. The closer the two conductors are together, the larger the value of capacitance. 2. The longer the conductors, the larger the value of capacitance. 3. The longer
