Indicators for vacuum tube replacement devices

Details Indicators for vacuum tube replacement devices Indicators for vacuum tube replacement devices

2007-10-23

2007-10-23

Mullen, Thomas (Department: 2612)

Communications: electrical

Visual indication

C330S002000, C340S653000, C340S660000, C340S664000, C340S815450

Reexamination Certificate

active

11203077

ABSTRACT:
A vacuum tube replacement device includes an indicator. The indicator can be arranged to provide audible and/or visual indication of system performance, function, status, or any other desired indication. The vacuum tube replacement device is pin-for-pin compatible with standard vacuum tube circuit pin configurations. The replacement device may be a solid-state tube emulator device, a traditional glass envelope vacuum tube device, or some other hybrid device. The visual indicator is equally useful for non-vacuum tube replacement devices such as audio amplifier circuits.

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