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| Marconi Wireless Radio Transmitter Spark Coil | This large spark coil has an ivory label for W & J George of Birmingham & London. It also has a brass tag for Marconi Wireless and Telegraph. It uses a separate interrupter to generate the high voltages. Inside the base is the condenser. Coils like this were used in early experimental low wattage transmitters or on ships as backups for larger transmitters. |
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