This is the larger glass-envelope 5V4G version with a black octal base and clearly visible Sylvania markings. Tube type: 5V4G. Function: Full-wave rectifier. The tube has now been tested and tested strong on my tube tester.
This is the larger glass-envelope 5V4G version with a black octal base and clearly visible Sylvania markings. Tube type: 5V4G. Function: Full-wave rectifier. The tube has now been tested and tested strong on my tube tester.