Gakken EX-System inside View
The EX-System was a simple plastic construction that by all accounts should have become cheaper to produce over time. It was an extremely well designed product with a good standard of finish. Inside this system, we can see that there is a ferrite rod with an antenna coil, and a tuning capacitor. There is also a small printed circuit board (PCB) with a speaker, which is within the IC AMP module, and detachable. Here are some photographs showing the different sides in larger format, which might be useful.
Ferrite Rod and Tuning Capacitor
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Gakken EX-SystemSkilcraft Electronic Experiment Set
Gakken EX-System inside View
EX-System Packaging and Contents
Gakken EX-System Denshi Blocks
Gakken EX-System Crystal Earpiece
Gakken EX-System IC AMP Module
EX-System Box
EX-System CdS and Meter Upgrade
EX-System Battery Compartment