(!!) (Single) 2A3 RCA branded CBS black plates like new 1940's (103ma) (high Gm)
(!!) (SINGLE) 307A=VT-225 Sylvania NOS 1940's (44ma)
(!!) (Single) 47 RCA Victor NOS 1940's (32ma Gm=2620)
(!!) (Single) 6Y6G Tungsol NOS 1954 (74ma)
(!!) (Single) G-45 Majestic Balloon used/good 1930 era (32.5ma)
(!!) (Single) JAN-CKR-6Y6G Ken Rad NOS 1944 (56ma)
(!!) (Single) JAN-CKR-6Y6G Ken Rad NOS 1944 (75ma)
(!!) (~ Recommended Pair ~) 6JD6 GE branded RCA NOS same date codes (13ma and 14ma)
(!!) (~ Recommended ~) VT-107A=JAN-CHS-6V6GT Sylvania black plate / gray coated glass NOS 1945 (35ma)
(!!) 2A3 Sylvania black plates connected in middle like new 1940's (104ma)
(!!) 2A3 Sylvania rebranded National Union black plates connected in middle like new 1940's (108ma)
(!!) 45 RCA Victor NOS in RCA box 1948 (39ma)
(!!) 6146B Sylvania branded RTC NOS 1960's (94ma)
(!!) 6146W Sylvania NOS 1970's (105ma)
(!!) 6336 Chatham by Tungsol metal plates used 1950's 1st series made (54ma/85ma)
(!!) 6AQ5A GE Johnson Electron tube NOS 1962 (42ma)
(!!) 6AS7G Russian branded National NOS 1990's (50ma/86ma)
(!!) 6AS7G Russian branded National NOS 1990's (51ma/77ma)
(!!) 6AS7G Russian branded National NOS 1990's (62ma/65ma)
(!!) 6BQ5 Sylvania black plate NOS 1960 era (51ma)
