Technical personnel need to know appropriate design factors to apply in selecting components for broadcast RF systems. While there are no set standards in lighting capacitorthis area, there are general industry best practices in place at many companies that have worked for years.
 

All of the antenna system component computations are based on RMS Carrier voltage and current. These computations are adjusted for modulation peaks and related to the specific labeling system used on mica and vacuum capacitors, which are different! A mica capacitor (292, G3, etc.) with a voltage rating of 20 KV is roughly equal to a rating of 35 KV in a vacuum capacitor. Current ratings do not require such an adjustment.

Vacuum Capacitors margin is based off Peak Test Volts Rating.

(Built-in 40% Safety Factor to Peak Modulation)
 

Mica Capacitor margin is based off Peak Working Volts Rating.

(Built-in 40% Safety Factor to Peak Modulation)
 

Capacitors & Inductors margin is based off RMS Current Ratings.

(Built-in 20% Safety Factor to Average Modulation)

Bear in ideas that these ratings are dependent on protection factors best suited to some design and design dependent on "solid" parameters. within of the absence of design and design limits, if parameters (i.e. - antenna impedance, etc.) are determined or uncertain, higher design and design factors should be applied, that certainly are a make any difference of engineering judgment. for another hand, reduce design and design factors may maybe be justified in which specific considerations of element cooling, placement or operation prevail.

The marketplace favored exercise on this circumstance can be to create utilization of the above factors in the worst-case design and design operating values representing the limits within of the frequencies and impedances for which the products is designed. This exercise will regularly end result in even much more conservative design and design factors near to the center within of the designed range. However, in effortless reduce energy systems, escalating the above values 10 - 15% and applying that for the determined antenna impedance may maybe be satisfactory to accommodate variations encountered within of the field.

When models are designed dependent upon determined data, it is essential to confirm the adequacy of element assortment by measurement or computations dependent on measured parameters earlier to applying rated method power!

Bear in ideas that factors shared with various frequencies, such as in filters for diplexers or triplexers, possess a specific build of rules. Basically, voltages include vectorially, and currents include on an RSS basis. Evaluation of those circuits is most effective left to an experienced RF design and design engineer.