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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube record

M8137, CV4004

Brand
Mullard

Pinched Tip

Code On Tube
641 R6K2
Country
Great Britain
Factory Code
R - Mullard, Mitcham, R - Mullard, Mitcham
Getter
O-Getter Halo
Getter Support
One
Glass Color
Clear Glass
Mica
Double
Notes
KB/QDD Mark K = specification K1001 or K1006 B = approved by UK authority
Archive ID
melish32
Pin Color
Silver Pins
Plate Color
Matte Gray
Plate Look
Boxed Plate
Plate Size
14mm
Special Use
KB - UK Military
Tip Shape
Pinched Tip
Year
1966

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Equivalent and related tube numbers

Commonly cross-referenced designations for CV4004. Compatibility is not guaranteed. Before substituting, verify socket and pinout, heater voltage and current, bias requirements, and maximum ratings against the relevant manufacturers’ datasheets.

  • 12AX7
  • ECC83

More CV4004 type tubes

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  • Teonex CV4004 tube — photo 1 of 2
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