955

Small Signal Triode — Acorn

Known Equivalents & Substitutes

CV1059VR59VT12157711650467UN955

Similar Tubes (Not Drop-In Compatible)

Later miniature (B7G) VHF triode replacing acorn types — different base and pinout

9001

Miniature (all-glass B7G) replacement for the 955 acorn triode — different base, not pin-compatible

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)250V

Anode Dissipation (max)Anode Dissipation (max)1.6W

Cathode Current (max)Cathode Current (max)8mA

Typical Operating

Anode Voltage (typical)Anode Voltage180V

Notes

Acorn-type envelope with radial wire leads — uses special acorn socket (5-pin, JEDEC base 5BC).
Originally designed for VHF/UHF service in early radar and communications equipment during WWII.
MIL-HDBK-213A lists substitutes: 5771, 1650, 467.
Sams Substitution Handbook cross-references 5771, 1650, 467.
TDSL maximum ratings: Va_max = 180V (ICAS), Ia_max = 8 mA.
GE Essential Characteristics lists Va_max = 250V (absolute max) and Pa_max = 1.6W.
The 9001 miniature tube was designed as the B7G replacement for the 955 acorn.

Socket-Compatible Tubes ⚠ Not electrically compatible

References