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(!) (#3 6688A PAIR) 6688A Amperex PQ USA NOS black plates triple mica original boxes same date codes 1976-1977 (9ma and 9ma)

(!) (#3 6688A PAIR) 6688A Amperex PQ USA NOS black plates triple mica original boxes same date codes 1976-1977 (9ma and 9ma)

$ 21.99

1 pair) 6688A Amperex PQ USA NOS black plates triple mica original boxes same date codes 1976-1977

1 tube) 9ma Gm=13,200

1 tube) 9ma Gm=13,700

 

(recommended, best US made)

  

(10,000 hour 9-pin frame grid broadband Pentode, variant is 7737)

- Supratek Chenin, Cortese preamp
- Yamamoto 06-3 2010

See more: vacuum tube
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