Acorn Tube Link

Developed primarily by and introduced around 1935, the family includes several distinct types: Classification Common Use 955 Oscillators and detectors up to 600 MHz 954 Sharp Cut-off Pentode VHF amplifiers 956 Remote Cut-off Pentode Superheterodyne receivers with AVC 957/958/959 Battery Types Portable/military equipment (e.g., walkie-talkies) 3. Physical Design & Installation

: Unlike standard tubes with pins at the bottom, acorn tubes have pins protruding from the "equator" of the glass bulb. acorn tube

: They were quickly superseded in the mid-1940s by "miniature" 7-pin tubes and later nuvistors , which were even smaller and more rugged. SOCKETLESS TUBE CIRCUIT TECHNIQUES - J. W. Rush, Jr. Developed primarily by and introduced around 1935, the

Acorn tubes solved this through . By shrinking the electrodes and bringing the pins out radially through the side of the glass, they achieved extremely short signal paths and low inductance. 2. Key Models & Classifications SOCKETLESS TUBE CIRCUIT TECHNIQUES - J

Today, acorn tubes like the RCA 958 are sought after by collectors and restorers of vintage RF gear.