This classic black t-shirt features a detailed graphic print showcasing technical specifications for the EL34/6CA7 power output pentode vacuum tube. The design highlights key parameters such as heater voltage, heater current, max plate voltage, and transconductance. Made from a comfortable, soft fabric, this shirt is perfect for electronics enthusiasts, audio engineers, and vintage amp aficionados. Wear it to your next tech meetup, music event, or just around town to show off your passion for classic electronic components. The understated yet informative design makes it a great conversation starter for fellow gearheads.