Telefunken DF703 CK5886 NOS Tube - 1960s - Sealed NIB - Satisfaction Guaranteed

Listing details

The Telefunken DF703 is a vacuum tube that falls into the category of electrometer tetrodes or pentodes. Let’s explore more about this interesting tube:

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Listing is for one tube (when available, you may purchase multiple singles and combine shipping)

Made in Germany

NOS / NIB

Tubes are individually sealed in the original plastic protectors.

Original boxes are in fair condition, inner sealed bags are in new condition.

Tube Type: Electrometer Tetrode or Pentode

First Introduced: Year 1963

Equivalent Identifications: DF703, 5886, CK5886, CK571AX

Heater Voltage: 1.25 V

Heater Current: 0.01 A

Heater Voltage and Current: The filament operates at a voltage of 1.25 Volts and a current of 0.01 Ampere

Description: The DF703 is an elektrometer-röhre, designed for practically load-free measurement of small voltages. It allows precise measurement of tiny voltage variations.

Dimensions: Approximately 10 mm x 38 mm (including pins/tip)

Weight: 3 grams

DF703 Vacuum Tube

This tube was manufactured by Telefunken (TFK), which was known for its high-quality electronic components. The DF703 is a specialized tube used in applications where extremely sensitive voltage measurements are required. The DF703 is an electrometer pentode that would be used where an extremely high input impedance is required such as in pH meters. Operation is at low voltage with very low current.

Inventory locator number is c3-2 81739948