(!!!) (Best Single from 1951) 12SN7GT GE parallel black ribbed plates 1951 (7.6/8.4ma)

1 low noise tube) 12SN7GT GE parallel black ribbed plates (1-17=1951)

7.6ma Gm=2600

8.4ma Gm=2700

– Mapletree
– McAlister Audio MA-10
– Tom Tutay preamp