Sophia Electric Classic II 300B Tubes
Sophia Electric Classic II 300B Tubes
Sophia Electric is excited to announce the launch of a new magical sounding Classic II 300B tubes for the audiophile community. Over 6 years in the making and multiple voicing revisions, Richard is ready to release a new Sophia Electric product with a signature magical sound.
Three color options are available for the Classic II 300B tubes: clear glass with white ceramic base, clear glass with black base, and blue glass with blue ceramic base.
Sophia Electric Classic 300B Vacuum Tube Specification
| Filament voltage | *5.0V |
| Nominal filament current | 1.2A |
| Plate voltage | 300V |
| Grid voltage (AC filament) | **61V |
| Grid voltage (DC filament) | ***58V |
| Plate current | 60mA |
| Plate current | 62.5 mA |
| Grid to plate transconductance | 5700 ohms |
| Amplification factor | 3.85 |
| Grid current | 0.05 uA |
| Plate resistance | 700 ohms |
Limiting Operation conditions for safe operation-nor simultaneous ratings:
| Maximum plate voltage | 450 volts |
| Maximum plate dissipation | 40 watts |
| Maximum plate current of average tube for fixed grid bias | 70 ma |
| Maximum plate current for manually adjusted grid or self-biasing circuit | 100 ma |
Price :
Option 1: $999.99 per Grade A matched pair with one year warranty.
Option 2: $899.99 per Grade A matched pair with 30 days warranty.
Option 3: $799.99 per Grade B matched pair with one year warranty.
Option 4: $699.99 per Grade B matched pair with 30 days warranty.
Sophia Electric Classic II 300B Tubes
Sale price$699.99
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