COLLECTION OF HISTORIC EQUIPMENT AND COMPONENTS
WIRELESS RECEIVER TUNNING COILS
LOOSE COUPLER TRANSFORMER WITH
TUNNING ON THE PRIMARY AND SECONDARY
These tuning coils were used to build Crystal Detector Wireless Receivers, in the early days of Wireless Telegraph.
The frequency range covered the long and medium waves.
TUNING COIL WITH TWO SLIDERS
Point contact assembly
and GALENA crystals
IGNITION COIL OF FORD "MODEL"T" Automobile.
It was one of 4 plug-in coils in a wood box, which ignited the 4 cylinders engine.
At the beginning of the 20th century, experimenters and hobbyists have built home-made Wireless Telegraph spark-gap transmitters from parts that were available at specialized stores.
The FORD T ignition coil was used by many for supplying the high voltage pulses to the spark gap circuit.
The picture at the right shows an example of amateur wireless telegraph spark-gap transmitter of those days.
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