The RCA 6c5 is a vintage audio tube that was commonly used in consumer electronics. It is a powerful tube that is known for its high fidelity and is ideal for use in audio amplifiers and other audio equipment. This particular RCA 6c5 is in excellent working condition and has been tested to ensure that it is fully functional. The tube is made by RCA, a trusted brand in the electronics industry, and is designed to deliver outstanding performance. It is compatible with a wide range of audio equipment and is sure to enhance the sound quality of your music and other audio recordings. If you are looking for a high-quality vintage audio tube, the RCA 6c5 is an excellent choice.