Válvula 12AV7 RCA NOS – Doble Triodo de Alta Transconductancia

The 12AV7 RCA NOS Vacuum Tube is a miniature 9-pin dual triode originally designed for VHF frequency applications, but today highly regarded in audio design and modifications. Thanks to its exceptionally high transconductance (6100 µmhos) and robust plate current capability, this tube delivers a sound with outstanding authority, tight controlled bass, and incredibly musical harmonic distortion. It is the perfect choice when a 12AT7 sounds too bright or a 12AU7 lacks sufficient gain.

Manufacturer History: Radio Corporation of America (RCA)

RCA was the undisputed giant and pioneer of vacuum tube manufacturing in the United States. Its military and industrial quality control standards set the benchmark worldwide. Owning a tube with the classic RCA orange/red logo is synonymous with stable plates, long-lasting filaments, and a sonic profile characterized by warm, silky mids highly sought after by analog audio purists.

Main Uses and Applications of the 12AV7 RCA NOS Vacuum Tube

• High Fidelity Audio (Hi-Fi): Excellent performance in line preamplifiers and headphone output stages thanks to its strong current handling capability.

• Guitar and Bass Amplifiers: Strategic substitute for V1 positions or the phase inverter stage. Helps increase headroom (clean margin) in amplifiers that saturate too quickly with 12AX7 tubes.

• Vintage Restoration: Direct original replacement for mid-20th century radios, oscilloscopes, and televisions requiring factory-spec components.

Technical Specifications of the 12AV7 RCA NOS Vacuum Tube

• Tube Type: Medium-Gain Dual Triode (Medium-Mu Twin Triode).

• Heater Voltage: 6.3V @ 450mA (Parallel) / 12.6V @ 225mA (Series)

• Amplification Factor (µ): 41.

• Transconductance (Gm): 6100 µmhos.

• Plate Current: 18 mA.

• Plate Resistance: 6700 Ohms.

• Maximum Plate Dissipation per Plate: 2.7 Watts.

• Base: Noval B9A (9-Pin).

(FAQ)

How does the 12AV7 differ from a 12AX7 or 12AT7?
The main difference lies in the amplification factor (gain). The 12AX7 has a gain factor of 100, the 12AT7 of 60, and this 12AV7 has a gain factor of 41. This makes it ideal for reducing excessive saturation and achieving a cleaner, more defined tone in preamplifier circuits.

What does the term NOS mean for this RCA tube?
NOS stands for New Old Stock. It means the product is an original vintage component (not a modern reissue) that has never been used in a circuit and remains preserved in its original factory packaging.

How do you guarantee proper operation if it is an old product?
Although it is new (never used), the tube is tested for emission using a calibrated tube tester. This verifies that the cathode emits electrons correctly and that there are no internal short circuits, ensuring full functionality.