tubes for sound
for sound preamplifier
all are equivalent 12au7 type : CV4003, CV491, ECC82, E82CC, ECC802S, M8136, 12AU7, 12AU7A, 12AU7WA, 5814, 5814A, 5963, 6067, 6189 & 7730
boxes as an art
sale tubes catalog here
Indicators tubes provides visual indication, usually in the form of green light, on an area called the target inside the tube
EM80, UM80, EM81, EM84, UM84, EM804, UM804, 6E5, 6G5, 6H5, 6U5, 6DG7, UM87, 2E5, 2G5, 1629 6FG6 1N1 1M3 DM70
more artistic tube HERE
SALE Catalog here
