HP403B AC-Voltmeter
The -hp- Model 403B Transistorized AC Voltmeter is a general purpose instrument that measures rms values of ac voltages in the 5 Hz to 2 MHz range.
The instrument has full-scale ranges from 1 mV to 300 volts (-72 dBm to+52dBm) in a 1,3,10 sequence.
The Model 403B meter face is calibrated with the upper scale in volts (rms).
