Description
(!!!!) (Best Single 1957) ECC83=12AX7 Mullard UK long plates “D” getter NOS 1957 (mC1 series) (1.1/1.1ma) 1% section balance
1 low noise tube) ECC83=12AX7 Mullard UK long plates “D” getter NOS 1957 original box
(mC1-B7A=1957)
1 section) 1.1ma Gm=1550
1 section) 1.1ma Gm=1550
- (mC1-B7A=1957) (mC1 series, 1st series made)
- 17mm = long plates
- “D” getter halo
- copper grid posts
- big midrange, sweet high end, very rare