Fullmusic 300B/SE Vacuum Tube Electron Valve Tube Replace EH JJ PSVANE 300B For Vintage Hifi Audio TUBE AMP DIY Factory Match (one pairs)

Tips:
1. If there is no prompt, the default shipment is eggplant type, 5V, white porcelain base.
2. Two shapes: eggplant type and DOME type (same price)
3. Two types of tube base: copper base and white porcelain base (same price)

Features: It is a dome-shaped or eggplant-shaped glass bulb, four white ceramic bases with gold-plated legs, direct-heating oxide cathode, mesh plate electrode, graphite plate electrode triode.
Uses: used for audio amplifier, the output power is 8.5W

Standard working status and parameters:
Heating voltage * ........................................................................ 5V or 2.5V
Heating current ...................................................... 1.2A or 2.4A
Plate voltage ……………………………………………………………… 300V
Gate voltage ** ........................................................................- 58V
Plate resistance ..................................................................... 700ohms
Plate current ……………………………………………………………… 60mA
Magnification ........................................................................ 3.85
Transconductance .............................................................................. 5.7mA / V
Gate current ........................................................................ 0.05μA
* AC filament power supply or DC filament power supply
** The AC filament power supply grid or plate circuit is connected to the secondary center of the filament transformer, the DC filament power supply, the grid anode power supply circuit is connected to the filament negative terminal.

Limit working value:
Maximum plate voltage …………………………………………………… 450V
Maximum plate power consumption ............................................................ 40W
Maximum plate current (when fixed bias is used) .............................. 70mA
Maximum plate current (when using self-supporting bias) ……………………… 100mA