TETRODES & PENTODES - 11

5D21	PL-5D22	5F23A	5-Y-35	6D22	6L6	6L50	6P21S 6П21С
GL-7D21	8D21	4-65A 8165	4-125A 4D21	AX4-125A	4-250A 5D22	4-400A 8348	4-400B 7527
4-400C 6775	4-500A	4-750A	4-1000A 8166	5-500A	PZ1-75	PC1.5/100	BB2/250E
UNKNOWN

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