We have four RCA Radio Tubes, Model CRC78, available for purchase. Please select the quantity you want at checkout. All are brand new and in their original packaging, unopened. Sold as is, untested. See photos for more details. Any questions will be responded to as quickly as possible. 

RCA (Radio Corporation of America) was a major American electronics company that played a significant role in the development of radio and television technologies. In the early to mid-20th century, radio tubes were a crucial component in electronic devices, serving as amplifiers and signal processors. 

Additional Information: 

 Comes as is, untested. See photos for more details. What is pictured is what you will receive!  Any questions will be responded to as quickly as possible. Make this rare piece of aviation history part of your collection! And feel free to look at the rest of our listings as we preserve aviation and space flight history and technology. All proceeds from this sale benefits the San Diego Air & Space Museum, a private non-profit 501(3)c organization to carry out its mission.