7247 GE NOS tall gray ribbed plates 1970's (1.1ma and 9.4ma)
By Tube World
$ 47.99
1 tube) 7247 GE NOS tall gray ribbed plates 1970's
12AX7 Section = 1.1ma Gm=1600
12AU7 Section = 9.4ma Gm=2100
Tested on Amplitrex
12AX7 Section Good = 1-1.2ma Gm=1600
12AU7 Section Good = 8-10ma Gm=1800-2200
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