7591 General Electric

This tube is a glass octal type power pentode used as an audio-frequency power-output tube in high-quality audio applications.

These tubes were acquired from a special source.  The date codes are early 1960’s.

This tube is a glass octal type power pentode used as an audio-frequency power-output tube in high-quality audio applications.

These tubes were acquired from a special source.  The date codes are early 1960’s.