Contents
How many volts maximum is a 12AX7 preamp tube?
| 12AX7 | |
|---|---|
| Heater current | 150 mA (series) 300 mA (parallel) |
| Anode | |
| Max dissipation Watts | 1 per section |
| Max voltage | 300 V |
What is the purpose of the voltage grid in a vacuum tube?
The Grid controls the flow of electrons through the tube. The Plate is charged with high voltage DC to pull electrons from the cathode, through the grid to the Plate. The Load resistor transforms the circuit from a current amplifier to a voltage amplifier.
What does a 12AX7 tube do?
The 12AX7 is typically used as a class-A amplifier in the hi-fi, professional line and microphone preamps and is usually, always found in the preamp sections of tube guitar amps including Fender, Marshall, Boogie and Soldano….DOUBLE TRIODE (separate cathodes)
| Heater Voltage | 6.3-12 | V |
|---|---|---|
| Plate Dissipation (max) | 1.1 | W |
What is a vacuum tube plate?
A plate, usually called anode in Britain, is a type of electrode that forms part of a vacuum tube. It is usually made of sheet metal, connected to a wire which passes through the glass envelope of the tube to a terminal in the base of the tube, where it is connected to the external circuit.
What 12AX7 tube is best?
Best 12AX7 Tubes for Hi-Fi Reviewed
- 1 Genalex Gold Lion Best 12AX7 Tube for Hi-Fi. See more reviews.
- 2 JJ 12AX7 Preamp Vacuum Tubes (ECC83) for Hi-Fi. See more reviews.
- 3 Tung-Sol 12AX7 Preamp Tube for Hi-Fi. See more reviews.
Is 12AX7 the same as ECC83?
The ECC83 Valve – also known as the 12AX7. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 – same valve, just a different name. It has two identical triodes both of which have a high voltage gain. It is used in 99% of all guitar amplifiers.
Is the electron emitting element of a tube?
The filament (cathode) has a dual function: it emits electrons when heated; and, together with the plate, it creates an electric field due to the potential difference between them. Most modern tubes are “indirectly heated” by a “heater” element inside a metal tube that is the cathode.
Can a 12AU7 replace a 12AX7?
Technically, yes, you can physically interchange a 12AX7 tube for a 12AU7 tube in your amp without risk of major damage to your amp.
How long does a 12AX7 tube last?
Small signal tubes like a 12AX7 or 6922 will work well on average for about 10,000 hours. If you leave your equipment on 24 hours a day, well you do the math: There are 8,760 hours in a year.
What is the difference between 12AX7 and 12AX7A?
12AX7A is an “updated” lower noise version of 12AX7, and as Mr. Hoffman said it has to do with the way the heater is designed. Another 12AX7 “update” are 7025 tubes which are supposedly less noisy than 12AX7A and with lower hum, again because of heater being redesigned.