Western Electric - 5591/403B - Tube, Electron. Mount: 7 Pin.
Western Electric - 5591/403B Tube, Electron.
This is a miniature pentode with 6.3V filament similiar to 6AK5 and 5654. The 403B/5591 uses less heater power and has a longer life than 403A. Dates back to 1950s. These are good upgrade tubes to Little Dot Mk3, Yaqin CD2, Grant Fidelity and Dark Voice.
Mount: 7 Pin.
Miniature Pentode Tube
For use as RF amplifier and broadband amplifier.
Genuine Vintage Western Electric Tube - New Old Stock
Replaces 403A, 403-B, 6AK5, and 5591 tube types.
Applications: Little Dot headphone amps and some tube buffers.
Proudly Made in USA
| SKU | 159615 |
|---|---|
| Condition | NOS - NEW OLD SURPLUS |
| Part Number | 5591/403B |
Western Electric - 5591/403B Tube, Electron.
This is a miniature pentode with 6.3V filament similiar to 6AK5 and 5654. The 403B/5591 uses less heater power and has a longer life than 403A. Dates back to 1950s. These are good upgrade tubes to Little Dot Mk3, Yaqin CD2, Grant Fidelity and Dark Voice.
Mount: 7 Pin.
Miniature Pentode Tube
For use as RF amplifier and broadband amplifier.
Genuine Vintage Western Electric Tube - New Old Stock
Replaces 403A, 403-B, 6AK5, and 5591 tube types.
Applications: Little Dot headphone amps and some tube buffers.
Proudly Made in USA
