I have several Matched Pair and Single Tubes listed. They are described below. All have been tested on a tube tester and checked by listening to in either a preamp or amplifier to be sure they not only measure well, but also sound good. Test as new. I have had these stored and am thinning the herd. I have more tubes than I will ever use. Tubes will be well packed for safe transit. Buyer pays shipping. I usually ship on Tuesday and Friday. Take a look and see if there's something you may like. Please note- I had many more tubes listed and they have been sold. USAM doesn't allow me to remove any of the pictures, so the corresponding photos are noted in the tube description.
RCA 5U4GB Single Black Plates, Rectangular Side Getter, Base is a bit loose, $10 -- Pic #1
RCA 5U4GB Single Black Plates, Rectangular Side Getter, NOS $15 -- Pics # 4 and 5
Conn 5U4GB MP Black Plates- Rectangular Side Getter $30 --Pics # 6 and 7 Not sure of manufacturer. Probably RCA Date Code 32 E, 30 A, 74