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Specialized - Gauge Tube ·Gauge

6535

Pyrex thermocouple thermal-conductivity vacuum gauge electrically identical to VTP 6343.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
8FR
Socket code
-
Base pins
8
Nominal heater
-

Description

Pyrex thermocouple thermal-conductivity vacuum gauge; electrically identical to VTP 6343.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8FR
Socket code
-
Base pins
8
Nominal heater voltage
-
Nominal heater current
17 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8FR - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Gauge

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published applicable promoted ratings populated; remaining device-specific values retained as parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1955 Vacuum Tube Products

Published operating points and test conditions from this source.

SECTION 1

Gauge

Characteristic

  • Heater Current Normal

    17 mA

  • Heater Resistance Cold

    8.33 ohm

  • Heater Resistance Hot

    18 ohm

  • Thermocouple Output Hard Vacuum

    10 mV

    55-ohm load

  • Thermocouple Output Air

    1 mV

    55-ohm load

  • Speed of Response

    0.1 s

    Faster than stated value

  • Pressure Range

    0.1 to 1000 micron

Other

  • Heater Current Maximum

    100 mA