Unlock the power of your DIY audio project with these curated voltage requirements for vacuum tubes used in amplifier. Let there specifications guide you towards creating perfect sound for your custom-built amplifier. Trial and error. ☺
| Power rating | Plate voltage range | Filament voltage | Current draw | |
| 10Y | 7.5W | 250-450V | 10V | 1.25A |
| 12AT7 | N/A | 90-300V | 6.3V | 0.3A |
| 12AU7 | N/A | 90-300V | 6.3V | 0.3A |
| 12AX7 | N/A | 90-300V | 6.3V | 0.3A |
| 211 | 20W | 400-800V | 10V | 1.25A |
| 274B | N/A | Max 550V | 5V / 6.3V | 2A |
| 2A3 | 3.5W | 250-350V | 2.5V | 2.5A |
| 300A | 15W | 250-1000V | 5V | 4.5A |
| 300B | 8W | 250-500V | 5V | 1.2A |
| 350B | 45W | 250-500V | 5V | 1.2A |
| 45 | 3.5W | 250-300V | 2.5V | 1.75A |
| 50 | 5W | 250-300V | 2.5V | 1.5A |
| 504 | 10W | Max 550V | 5V | 3A |
| 5AR4 | N/A | Max 600V | 5V | 1.9A |
| 5R4 | N/A | Max 500V | 5V | 2A |
| 5Y3 | N/A | Max 450V | 5V | 2A |
| 5Z3 | N/A | Max 450V | 5V | 2A |
| 5Z4 | N/A | Max 450V | 5V | 2A |
| 6550 | 35W | 400-800V | 6.3V | 1.6A |
| 6AQ5 | 4W | 250-300V | 6.3V | 0.45A |
| 6AS7 | 6W | 150-300V | 6.3V | 2.5A |
| 6AU6 | N/A | 90-250V | 6.3V | 0.15A |
| 6B4G | 6W | 250-350V | 2.5V | 2.5A |
| 6BQ5 | 15W | 250-300V | 6.3V | 0.45A |
| 6BX7 | N/A | 90-250V | 6.3V | 0.3A |
| 6CA7 | 25W | 250-800V | 6.3V | 1.5A |
| 6CG7 | N/A | 90-250V | 6.3V | 0.3A |
| 6DJ8 | N/A | 90-250V | 6.3V | 0.3A |
| 6F6 | 10W | 250-450V | 6.3V | 0.45A |
| 6L6 | 25W | 250-500V | 6.3V | 0.9A |
| 6L6GC | 30W | 250-500V | 6.3V | 0.9A |
| 6N1P | N/A | 90-250V | 6.3V | 0.3A |
| 6N23P | N/A | 90-250V | 6.3V | 0.3A |
| 6N30P-DR | N/A | 90-250V | 6.3V | 0.3A |
| 6N30P-ER | N/A | 90-250V | 6.3V | 0.3A |
| 6N3P | N/A | 90-250V | 6.3V | 0.3A |
| 6N6P | N/A | 90-250V | 6.3V | 0.3A |
| 6N8S | N/A | 90-250V | 6.3V | 0.3A |
| 6P14P | 12W | 250-300V | 6.3V | 0.72A |
| 6P15P-EV | 12W | 250-300V | 6.3V | 0.9A |
| 6P3S | 10W | 250-350V | 6.3V | 0.9A |
| 6P7S | 12W | 250-300V | 6.3V | 0.3A |
| 6SL7 | N/A | 90-250V | 6.3V | 0.3A |
| 6SN7 | N/A | 250-450V | 6.3V | 0.6A |
| 6SN7GT | N/A | 250-450V | 6.3V | 0.6A |
| 6V6 | 14W | 250-450V | 6.3V | 0.45A |
| 6V6GT | 14W | 250-450V | 6.3V | 0.45A |
| 7027A | 30W | 400-500V | 6.3V | 1.6A |
| 7199 | N/A | 90-300V | 6.3V | 0.3A |
| 7591 | 30W | 250-400V | 6.3V | 0.9A |
| 7868 | 18W | 250-400V | 6.3V | 1.5A |
| 807 | 25W | 250-500V | 6.3V | 1.6A |
| 811A | 10W | 250-500V | 10V | 1.6A |
| 812A | 15W | 250-500V | 12.6V | 1.6A |
| 818A | 20W | 300-600V | 5V | 1.5A |
| 833A | 125W | 1000-3000V | 10V | 10A |
| 845 | 20W | 800-1000V | 10V | 1.5A |
| 85A2 | N/A | Max 550V | 6.3V | 0.3A |
| CV4003 | N/A | 90-300V | 6.3V | 0.3A |
| CV4004 | N/A | 90-300V | 6.3V | 0.3A |
| CV4005 | N/A | 90-300V | 6.3V | 0.3A |
| CV4006 | N/A | 90-300V | 6.3V | 0.3A |
| CV4007 | N/A | 90-300V | 6.3V | 0.3A |
| CV4008 | N/A | 90-300V | 6.3V | 0.3A |
| CV4013 | N/A | 90-300V | 6.3V | 0.3A |
| CV4024 | N/A | 90-300V | 6.3V | 0.3A |
| CV4033 | N/A | 90-300V | 6.3V | 0.3A |
| CV4034 | N/A | 90-300V | 6.3V | 0.3A |
| CV4040 | N/A | 90-300V | 6.3V | 0.3A |
| CV4052 | N/A | 90-300V | 6.3V | 0.3A |
| CV4068 | N/A | 90-300V | 6.3V | 0.3A |
| CV4070 | N/A | 90-300V | 6.3V | 0.3A |
| CV4085 | N/A | 90-300V | 6.3V | 0.3A |
| CV4108 | N/A | 90-300V | 6.3V | 0.3A |
| CV4111 | N/A | 90-300V | 6.3V | 0.3A |
| CV4115 | N/A | 90-300V | 6.3V | 0.3A |
| EL34 | 25W | 250-800V | 6.3V | 1.5A |
| EL84 | 10W | 250-300V | 6.3V | 0.76A |
| GZ34 | N/A | Max 550V | 5V | 1.9A |
| KT66 | 25W | 250-500V | 6.3V | 1.3A |
| KT77 | 25W | 250-500V | 6.3V | 1.3A |
| KT88 | 42W | 400-800V | 6.3V | 1.6A |
| KT90 | 60W | 400-800V | 6.3V | 1.6A |
| KT120 | 60W | 400-800V | 6.3V | 1.5A |
| KT150 | 70W | 400-800V | 6.3V | 1.6A |
| KT170 | 75W (Tung-Sol) | 400-800V | 6.3V | 1.6A |
| PX25 | 10W | 400-800V | 4V / 5V | 1.25A |
| PX4 | 5W | 250-400V | 4V | 1.25A |
* It's important to note that the voltage requirements may vary depending on the specific model and application, so it's always best to consult the datasheet or manufacturer's specifications for the most accurate information.
