Agilent Hewlett Packard Keysight 467A Power Amplifier. Frequency range DC to 1 MHz
(has slight damage to two knobs – see photos)
Agilent HP Keysight 467A Power Amplifier. Frequency range DC to 1 MHz with gain adjustable between 0 and 10X with up to 20 Volts peak output (10 Watts).