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Description: Pentode 6Ż4 (equiv. 6AC7, PL-left, DDR-middle, USSR-right)
Title: 6Z4 var
Credit: Own work
Author: RJB1
Usage Terms: Creative Commons Attribution 3.0
License: CC BY 3.0
License Link: http://creativecommons.org/licenses/by/3.0
Attribution Required?: Yes

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