5842

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The 5842 aka CK5842 aka 417A  (P/N 154-0408-00;157-0098-00;) is a high-gm UHF triode vacuum tube with a B9A (Noval) miniature 9-pin base.

It is used in low serial number instances of the 2A61, in the front-end differential amplifier.

Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
2A61 157-0098-00 900 - 986

Reference:

Tube aging procedure / Selection and checking procedure

Links

  • Amperex 5842

    Amperex 5842

  • Mullard 5842

    Mullard 5842

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