[Jayce]

On the other end of the spectrum from the 38-116, my RCA 15K came out with and uses all metal tubes except the eye tube. Where even I prefer glass, I wasn't happy until I found my NOS metal 6L6 tube to replace the single glass 6L6 someone had put in the radio years before. Oddly, the new military surplus metal tube I put in was almost an exact match to the original RCA metal 6L6 in there when I tested it.