A - anoda, K - katoda, S1, S2, S3 - siatki, Ż - żarzenie.
Pentode_symbol_pl.svg
Pentode_symbol_pl.svg: *Pentode-Symbol_de.svg: erstellt von de:User:RokerHRO, geaendert von de:User:Fgli
derivative work: RJB1 (talk)
derivative work: RJB1 (talk)