Hallicrafters HA-1, Инструкция по эксплуатации и обслуживанию

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Example I: A circuit maintaining a load current of 2.0 amperes and
an open circuit load voltage of 100 volts would require a C value of
0.4 µF and an R value of approximately 3.6 ohms. (See dotted lines
on chart).
Example II: Measured current and voltage is 50 mA and 150 V
respectively.
Solution: The proper protecting network would be a 0.001 µF
capacitor (Limiting capacity) in series with a 750 ohm resistor.
In current and voltage applications beyond the scope of the chart, the
minimum limiting capacitance value of 0.001 µF and a maximum resistance
value of 10,000 ohms should be used in the protection network.