Fiogure 2-4. Voltage discriminator, simplified schematic diagram.

TM 11-6660-204-25

Voltage discriminator, simplified schematic diagram.

Positive pulse selector stretcher, simplified schematic diagram.

monitor the signals as they are received from the

2-9. Audio Output

radiosonde receiver. A volume control is mounted

on the control panel to operate a speaker at the

desired level. Switch S205 was included in early

a. The audio output circuit uses one-half of a

models but has been discontinued in later models.

miniture twin-triode tube, V304B, to aurally

2-8