Raytheon 12AX7 black plate - matched pair

In stock

NOS Raytheon 12AX7 Black Plate, 1963

Perfect high-gain Raytheon NOS double triode for both guitar and (phono) audio applications.
Set of two.

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More Information
Tube type 12AX7
Manufacturer/Brand Raytheon
Production NOS
Tube kind Signaltube
Construction Dual Triode
Pin Layout Noval 9 pins
Country of Manufacture United States

NOS Raytheon 12AX7 Black plate - matched pair, 1963
This NOS Raytheon 12AX7 is a matched pair with the popular black plates (Anode). Popular in both guitar and audio amplifiers (especially phono).

Founded in 1922, Raytheon began producing electron tubes in the 1930s. At the beginning of the Second World War, Raytheon managed to get lucrative contracts from the American defense, especially in the area of radar tubes, which she later commercially deployed as microwave tubes after an engineer noticed that when testing a radar tube that the  chocolate bar that was sitting in his pocket melted away. Raytheon grew after the Second World War as one of the most important military manufacturers and continued to produce tubes until the 1950s and then switched to transistors as one of the first.

TubeDirect aims to be able to offer Raytheon NOS tubes in its product range. These NOS (New Old Stock, not second-hand) tubes are purchased from reliable suppliers from the USA and tested and supplied for delivery by us.

Matched tubes 
This set of tubes is matched. This means that the measured values of the tubes fall within the same range and thus perform equally.
This is important for two reasons:
1. To obtain the same gain factor per tube.
2. For the same amount of quiescent current per tube.
The first requirement speaks for itself and the second requirement prevents the one tube where a higher quiescent current or bias is needed to make it work in the linear region will also be worn out earlier. Both new tubes and our NOS tubes can be ordered separately.