5755 NOS Raytheon Balanced Clear Top CK5755 420A WE420A ECC83 E83CC 12AX7 Tube

Description

This listing is for a NOS 5755 balanced tube made by Raytheon.
Tubes test NOS/new on BK Precision 707.
Tested for white noise/tube hiss in Marshall 100W guitar amplifier.
The 420A electron tube is a double-triode having separate indirectly heated cathodes. The heater is center-tapped to permit operation from a 6.3 or 12.6 volt filament supply. This tube has been designed for use in d-c amplifier circuits where tube requirements include a high order of mechanical and thermionic stability as well as long life expectancy.
5755 can be used as a 12AX7 with an adapter.
Adapter can be purchased here: https://www.ebay.com/itm/234084045582?hash=item36807f130e:g:F6cAAOSwyWZZXO2M
The 12AX7 was originally intended as replacement for the
6SL7
family of dual-triode amplifier tubes for audio applications. As a popular choice for guitar tube amplifiers, its ongoing use in such equipment makes it one of the few small-signal vacuum tubes in continuous production since it was introduced, this is a vintage American made model.
Shipping: .45