RCA Red Silk 12au7 Tube

Rca 12au7 tube for sale. Red silk screened logo & info. The RCA 12AU7, specifically the highly regarded clear-top or organ variants, was a staple of 1950s–1960s American audio electronics. Used in many audio amps for clean yet tube sound. Used in the reverb stage of guitar amps to avoid distorion in the reverb. sound. Developed as a 9-pin, low-gain dual triode replacing the older octal 6SN7, it was commonly used in Baldwin and other organs, hi-fi preamps, and Phase Inverters due to its low noise and balanced, warm sound