(!!) (Best Pair) 6CZ5 RCA black plate 1960's - 1970 (48.8ma and 48.6ma)
By Tube World
$ 29.99
1 pair) 6CZ5 RCA black plate 1960's - 1970
1 tube) 48.8ma Gm=4900 (1970) RCA
1 tube) 48.6ma Gm=4800 (1970) RCA branded Westinghouse
(you cannot sub a 6CZ5 for a 6973, see 6973 for more details)
Good NOS mA = 40-45ma
Good NOS Gm = 4500-5000
- Beam Power Tube
See more: vacuum tube
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 (Best Pair) 6CZ5 RCA black plate 1960's - 1970 (48.8ma and 48.6ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_f594a284-6984-4d5c-b345-6859af58a11b.jpg?v=1713678906){kind=link}
 (Best Pair) 6CZ5 RCA black plate 1960's - 1970 (48.8ma and 48.6ma) "Pin It")