5r4gy tube nos cv717 Marconi Italy power rectifier tube amplifier amp vintage 5u4g

tested strong tube 5R4GY Marconi DD getter , brown base , twin mica , suspended heater filament ,
grey plate esternal welded ribbed , ceramic spacers insulator , professional tube with great sound
best Italian manufacturer handmade with extremely care with high grade and best materials for best sound in Hi End systems
long life tube especially designed to last long with best audio performance