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56 RCA no name NOS 1940's made for Radiotelefonica Argentia (5.1ma)

56 RCA no name NOS 1940's made for Radiotelefonica Argentia (5.1ma)

$ 13.99

56 RCA no name NOS 1940's made for Radiotelefonica Argentia in original box

5.1ma

Gm=1300

 

Tested on Amplitrex:

Vplate=250V

Vgrid=-13.5V

Iplate good range = 4.5-5.5ma

Gm=1400

(Vfilament = 2.5 volts)

 

 

 

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