2) Mint Matched NOS NIB Sylvania 6K11/6Q11 Guitar Amp. Audio Tubes | eBay
RCA 6K11 Vacuum Tube 6Q11 - Etsy Denmark
Vintage Component Spotlight: Compactron Tubes — Tropical Fish
Preamp tubes
Raytheon 6K11 Vacuum Tube New Old Stock Original Box 6Q11 - Etsy Australia
New Old Stock Philco 6K11 (6Q11) Triple Triode Tube Hickok Tested | eBay
Tung-Sol 6K11 / 6Q11 Compactron Tube Holy Grail for Fender Super Champ Ampeg VT-22 Soldano Hot Mod | Reverb
6K11 /6Q11 Three Section Triode Tube. Designed for sync clipper and gated AGC amplifier service in television receivers. Two medium mu triodes and one low mu triode. MFR: GE. SKU: 6K11-GE. New
Sylvania 6K11 Vacuum Tube New Old Stock Original Box 6Q11 - Etsy
6K11 /6Q11 Three Section Triode Tube. Designed for sync clipper and gated AGC amplifier service in television receivers. Two medium mu triodes and one low mu triode. MFR: GE. SKU: 6K11-GE. New
6K11=6Q11 GE branded RCA NOS 1960's (88/60, 92/60, 90/60)