Audio Tubes

Available for sale is a laboratory-matched pair of Brimar CV4068 / 13D3 dual triodes, Made in England. These are high-reliability “Special Quality” versions of the 12AU7 family, featuring the desirable Long Black Plate structure and a Big Ring Getter. These New Old Stock (NOS) units have been precision tested on the Amplitrex AT1000 for balanced performance.

https://www.nosaudiotubes.com/product/brimar-4068-6158-cv2212-13d3-6072-black-plate-one-nos-pair-super-rare-platinum-tested-on-amplitrex-at1000-tester-machine/

Mullard El84 vacuum tubes https://www.nosaudiotubes.com/product/mullard-el84-made-in-gt-britian-amplitrex-at1000-tested-1mq-4pcs/