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5 X EL504 MULLARD TUBE. 1960s PRODUCTION. 3 MICAS. DUAL GETTER. MATCHED CP ENA
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5 X EL504 MULLARD TUBE. 1960s PRODUCTION. 3 MICAS. DUAL GETTER. MATCHED CP ENA
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EL504 Pentode
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TDSL Tube data [EL504]
