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Copper vacuum tube bias probe with ceramic 8-pin socket and 23cm cable

LORDWORLD

LORDWORLD Vacuum Tube Bias Probe CT1-C 23cm Cable

SKU CH-KWFC-CA7QP

Tests cathode bias current on EL34, KT88, 6L6, 6V6, 5881, 6550, KT66, KT100, KT120 and 7027 tubes via multimeter

  • Test many tube types with one probe covering EL34 KT88 6L6 6V6 5881 6550 KT66 KT100 KT120 7027
  • Read bias current directly in milliamps using a standard multimeter on the mA range
  • Copper body and ceramic socket with gold pins give reliable conductivity and long life
  • 23 cm cable allows flexible positioning inside amplifier chassis
  • Fully assembled probe works immediately without extra setup or calculations

Probe for EL34 KT88 6L6 6V6 5881 6550 KT66 KT100

The LORDWORLD CT1-C is a cathode bias probe that lets technicians and hobbyists measure plate current on a wide range of octal power tubes. It accepts EL34 KT88 6L6 6V6 5881 6550 KT66 KT100 KT120 and 7027 types without adapters. A multimeter set to milliamps gives a direct reading so no calculations are needed. The unit arrives fully assembled and ready to use.

Copper body ceramic socket 23cm cable

A copper body ensures good conductivity while the ceramic socket with gold pins resists heat and oxidation during extended test sessions. The 23cm tube socket cable provides enough reach to keep the multimeter clear of hot chassis components. Installation is a simple matter of inserting the probe between the tube and its socket then connecting the meter leads. No external power or special tools are required. Builders who need to test nine-pin or other non-octal tubes cannot use this probe.

Steady reading under continuous bias check

Under sustained load the copper construction and gold pins maintain stable contact resistance so the millivolt drop across the probe stays consistent. This allows the multimeter to show a steady current value while the amplifier warms up and settles. The ceramic socket insulates reliably even when tube envelopes run hot. Users who want automated logging or data acquisition features will not find them here.

Highlights

  • Test many tube types with one probe covering EL34 KT88 6L6 6V6 5881 6550 KT66 KT100 KT120 7027
  • Read bias current directly in milliamps using a standard multimeter on the mA range
  • Copper body and ceramic socket with gold pins give reliable conductivity and long life
  • 23 cm cable allows flexible positioning inside amplifier chassis
  • Fully assembled probe works immediately without extra setup or calculations

Specifications

BrandLORDWORLD

Questions about this item

What is the maximum tube-pin current the CT1-C can carry before the copper body or ceramic socket overheats?

The probe uses a copper body and ceramic socket with gold pins rated for the full cathode current of tubes such as KT120 and KT100, so the practical limit is the tube's own maximum dissipation rather than the probe itself.

Does the 23 cm cable add measurable resistance or heat during continuous bias monitoring?

The short 23 cm copper cable adds negligible resistance and stays cool because it only carries the low milliamp cathode current read by the multimeter.

Which multimeter setting and leads are required to read bias directly in milliamps?

Set any digital multimeter to its mA range and connect its test leads to the probe's banana jacks; the CT1-C then gives a direct milliamp reading with no conversion needed.

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