1 low noise tube) JRC-12AU7 RCA NOS long gray plates mid-1950”s “”D”” getter
9ma Gm=2000
11.6ma Gm=2100
mil-grade 12AU7
Good mA = 8-10ma
Good Gm range 1800-2200
$19.50 $64.99
1 low noise tube) JRC-12AU7 RCA NOS long gray plates mid-1950”s “”D”” getter
9ma Gm=2000
11.6ma Gm=2100
mil-grade 12AU7
Good mA = 8-10ma
Good Gm range 1800-2200
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