6021 Sylvania Medium Mu Twin Triode Tube. Designed for use as an amplifier in high and UHF circuits. New old stock. No longer available for export. MFR: Sylvania. SKU: 6021.
Subminiature Tubes: The Future of Audio! - Effectrode
Russian-Made Vacuum Tube 6N16B (6021 6SN7) Twin Triode Made in Soviet (6 Set): Home: Amazon.com.au
SYLVANIA JAN6021 MILSPEC VINTAGE ELECTRON TUBE 6021 | eBay
Pre Tube Reviews: featuring CV3986/6021 - The HEADPHONE Community
6021 tube / CV3986 / ecc70 / 6n16b Sub Miniature British Tube NOS NIB | eBay
6021 TUBE | eBay
RAYTHOEN 12AT7 vacuum tube replaces ECC81/6021/ECC801 to provide pairing for tube amplifier and sound amplifier NOS - AliExpress