Tests NOS Matched Trio (3) RCA USA 6L7 Metal Vacuum Tubes | Reverb
RCA 6L7 Vacuum Tube Metal Tube Original Box Excellent - Etsy
6L7 Heptode Tube. Mixer tube designed for service with a separate oscillator as the first detector in superheterodyne receivers. MFR: RCA. SKU:6L7. New old stock. No longer available for export.