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6N3P-EV (original box)
6F5P (original box)
Soviet tube 6F5P is a triode-pentode with separate cathodes, amplification and generation of low frequency voltage. Near equivalent: ECL85, ECL805, 6GV8
6F5P Datasheet.pdf
6J9P-E (original box)
6N3P (original box)
6F4P
The Soviet 6F4P triode-pentode electron tube is used in the output stages of low-frequency power amplifiers. It is a direct replacement for the ECL84, 6DX8, 6DQ8. NOS
6F4P Datasheet.pdf