Quantity One
Vintage RCA 6AC7 6AC7A Vacuum Tube NIB NOS *TESTED*
New Old Stock
New In Box
Tested as shown on Hickok 533 Dynamic Mutual Conductance Tube Tester
Box worn from years of storage
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6AC7 6AC7A could interchange with 6AB7 6SK7 6SD7
The 6AC7 American metal pentode was designed for high gain amplification.