EC1000

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The 8254  (European: EC1000) is a subminiature triode vacuum tube designed for preamplifiers in measurement probes or microphones (used e.g. in early versions of the Neumann M149).

Philips EC1000 = Mullard 8254

The EC1000 is used as the front-end cathode-follower in the P6025 and P6032.

Key Specifications

Heater 6.3 V, 185 mA
Anode voltage 110 V max.
Anode power 1.5 W max.
Transconductance 14.5 mA/V @ 15 mA
Cathode current 22 mA max.
Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
? 157-0100-00 N/A

Data

Used in

Some instruments using part EC1000

Instrument Manufacturer Class Model Description Introduced
P6025 Tektronix Probe P6025 400 MHz cathode follower probe (?)
P6032 Tektronix Probe P6032 850 MHz cathode-follower probe 1962

Pictures