But being as this is a 7550 dual triode, the most powerful subminiature tube in the world… - Effectrode
Lorelei -Beautiful Sounding EL95 6021 PSE Amplifier
6021 @ The Valve Museum
Sylvania 1970 Sleeve NOS JAN 6021 1970 | Reverb
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.