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6J6   ECC91
6J6 and 6J6A are double triodes in a 7-pin (B7G) miniature glass construction, developed by RCA in New York (USA). It was first registered by RCA in September 1942, and was re-registered in 1949. The 6J6A was first registered by General Electric (GE) in 1656 [1]. It contains two identical triodes with a common cathode, that can be used in parallel or push-pull configuration. The 6J6 is designed for use in VHF/UHF RF amplifiers, oscillators and mixers. In mixers it can be used at frequencies up to 600 MHz. It is less suitable for AF applications. The 6J6 was also used in the flip-flop circuit of early IBM computers. In some (rare) cases, it is used in power supply units.

 6J6 datasheet
 6J6 datasheet (General Electric


Pinout as seen from the bottom of the valve

6J6 on this website
PD-3 spy radio transmitter with PSU
PD-5 spy radio transmitter with PSU
Versions
  • 6J6
    Basic version
  • 6J6A
    Cointrolled heater warm-up time
  • 6J6L
    Long-life version (50,000 hours)
Equivalents
  • ECC91
  • 6Н15П
    (6N15P)
  • TS52
  • A4434
  • 6CC31
  • T2M05
  • 5964
    Special coating for computer use
  • 6101
    Mil-spec variant
Specifications
  • Vf
    6.3 V AC/DC
  • If
    450 mA
  • Va
    150 V
  • Ia
    16 mA
  • Vg
    -10 V
  • Output
    3.5 W
  • Manufacturer
    RCA, GE
  • Dimensions
    18 × 52 mm
  • Weight
    8 g
References
  1. Kay Pirinha, 6J6 and its history
    diyAudio forum, 26 Septeber 2020.
Further information
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© Crypto Museum. Created: Thursday 31 August 2023. Last changed: Friday, 01 September 2023 - 07:40 CET.
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