301 Ballast tube

Jacob Roschy Martin Renz Ernst Erb Bernhard Nagel Eilert Menke 
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Forum » Valves / tubes - Semiconductors » VALVES/TUBES / SEMICONDUCTORS in RADIOMUSEUM » 301 Ballast tube
John Dodgshun
John Dodgshun
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26.Dec.19 09:43

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The 301 ballast tube has a standard E27 Edison screw base.