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7247 Fisher Telefunken Germany <> bottom

7247 Fisher Telefunken Germany <> bottom "RIBBED PLATES" used/good 1964 (.8ma and 10.4ma)

$ 69.99

1 low noise tube) 7247 Fisher Telefunken <> "RIBBED PLATES" used/good 1964

1 section) .8ma Gm=1500 (12AX7 Section) - good

1 section) 10.4ma Gm=2000 (12AU7 section) - like new

 

(1 section = 7025 = 12AX7 low noise voltage gain) 

Good used Ma range 0.7-1.0ma

Good used Gm range 1400-1600


(1 section = 12AU7 phase splitter) 

Good used Ma range 8-10ma

Good used Gm = 1700-1800

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