Antique Wireless Radio Slide Tuner Loose Coupler Shortwave 19″
USD 100.00 USD
The coupler consists of two coils, a primary and a secondary. The primary coil is stationary and is usually provided with a slider for varying the inductance by single turns. The secondary coil slides in and out of the primary to vary the coupling, and is designed with several switch points in order to change its inductance.
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