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191: Difference between revisions
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introduced in 1966. It covers frequencies from 350 kHz to 100 MHz in seven bands. The output | introduced in 1966. It covers frequencies from 350 kHz to 100 MHz in seven bands. The output | ||
amplitude can be adjusted in calibrated steps from 5 mV to 5 V in three ranges. The oscillator | amplitude can be adjusted in calibrated steps from 5 mV to 5 V in three ranges. The oscillator | ||
is an Colpitts oscillator using a 7119 tube. A peak-to-peak detector made with two GaAs diodes | is an Colpitts oscillator using a [[7119]] tube. A peak-to-peak detector made with two GaAs diodes | ||
measures the swing of the oscillator and produces a DC feedback signal that controls a series | measures the swing of the oscillator and produces a DC feedback signal that controls a series | ||
voltage regulator that supplies power to the oscillator. The calibration procedure in the manual makes use | voltage regulator that supplies power to the oscillator. The calibration procedure in the manual makes use | ||