Scooper Space Shuttle
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The Scooper Space Shuttle is a crystal scanner that can be modified easily to monitor your favourite paging frequency. By equipping the scanner
with the right crystal, it can be tuned to your local paging frequency.
The discriminator IC is a DIL Motorola MC3357, with the unfiltered audio at pin 9. |
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Scooper Space Shuttle
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A 10 k resistor is soldered to pin 9 of the
MC3357. This resistor can be mounted vertically. The inner conductor of a strand of shielded wire is connected to the
resistor's other lead. The braid can be soldered to the metal shield of a nearby coil, which is grounded.
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Pin 9 of the MC3357 is the discriminator
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Resistor and shielded wire
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The other side of the shielded wire is connected to a 3.5 mm mono chassis terminal, which is mounted in the back of the scanner.
The inner conductor is connected to the solder lug that connects to the tip of an inserted 3.5 mm jack. The shielding braid is soldered to the other lug.
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The discriminator output, middle top
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