Best by Tube for Beam & Pentode
Western Electric 339A
Western Electric 349A
Western Electric 350B
RCA 247
RCA 6550
ΌΊdν@6CA7
Ε@6G-B8@
ZENITH 6L6G
TELEFUNKEN EL-156
SIEMENS F2a
GEC KT-66
GEC KT-88
Since@@ 1999.11.07
UP Date