Unbeatable prices on thousands of guaranteed and tested vintage NOS hi-fi audio, radio, ham and industrial vacuum tubes for sale in stock and ready to ship. The only NOS valve dealer with a real webstore. We carry everything from NOS RCA 6L6GC black plates to JJ 12AX7s. We carry brands like Western Electric, Mullard, Telefunken, Sovtek, JJ, Electro-Harmonix, Genalex and Tung-Sol.
The 7591 is a great tube with a unique sound and character. The 6GM5 and 7868 are essentially the same tube but they do have different pin-outs so they would require an adapter to be ran in place of the 7591.