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Preamp tubes

 
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(!!!!) (Recommended Single) 5691 RCA Red Base NOS 1950's rebranded WL-5691 Westinghouse 1960 (2.2/2.3ma) 1-2% section balance

(!!!!) (Recommended Single) 5691 RCA Red Base NOS 1950's rebranded WL-5691 Westinghouse 1960 (2.2/2.3ma) 1-2% section balance

$ 138.88
5691 RCA Red Base gray plates low hours/tests like new 1966 - broken center guide pin (3.1/3.2ma)

5691 RCA Red Base gray plates low hours/tests like new 1966 - broken center guide pin (3.1/3.2ma)

$ 89.99
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