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188. Voltage and Power Amplifiers Used in PA-17A Amplifier Racks. -The type PA-12A voltage amplifiers used with this equipment are described in section 138, and the type PK-1 power amplifiers used are described in section 140.

189. Description of the PA-17A Voltage Amplifier Control Panel. -Near the top the voltage amplifier control panel is a test voltmeter. This meter has two scales, the upper scale reads up to 250 volts and the lower scale to 25 volts. To use the 25 volt scale it is necessary to press the meter push-button to the right of the meter. There are two indicator lamps, one on each side of the test meter, which indicate which voltage amplifier is turned "on".

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