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Part15

License Free, legal, low-power radio broadcasting

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Carl Blare

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@carl-blare

Active 3 years, 10 months ago
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Toy Time

Posted on December 31, 2012

Back when I opened the “Indoor Antenna Project”, which is still going on, I tested a baseboard ground run around the baseboard of several rooms down by the floor, and indeed it allowed the AMT3000 with my self-wound triangular shaped loading coil tune up to a perfect resonance, except that outside the house the signal only reached the sidewalk.

Tonight I devoted over 10-minutes to changing the ground, by removing the baseboard wire, and grounding the transmitter right below the floor with a clamp attached to the main I-beam that holds up the floor.

The I-beam is electrically grounded to water pipes, furnace ducting and has iron posts holding from the floor.

To tune the thing back up I needed to find a different tap on the coil but now the resonance is back to a peak and tomorrow we will be driving around in search of new footage covered on 1550kHz.

Part 15 radio is just large enough to escape needing a microscope.

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