LB 0070-001

AMPLIFIER,DC,FOR OLD 'FRANCK HERTZ' APPARATUS.

 

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An old model DC Amplifier originally designed to be added to a 'Franck Hertz' apparatus (AP1870-001) to amplify the very small currents so they can be seen on a student bench meter.

The 'Franck Hertz' unit now has an inbuilt amplifier, so this amplifier unit is now used as a "microamp to milliamp amplifier". There is no on/off switch and current is drawn only when it is used as an amplifier.

It has an internal 9V #216 dry cell and can be used for general high gain amplification applications. Input volts must exceed 0.6V and, with a gain of close to 1000:1, it will generally convert microamps of current into milliamps. See also LB0071-001.