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Amazon.com: Shark Antennas S-F20 Mono Band HF 20 Meter Mobile Vertical Antenna with 3/8x24 Threads, Handles 250W Max : Electronics
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MFJ Enterprises Original MFJ-1620T 20 Meter HF Hamstick w/ Whip Mobile Antenna - 3/8-24 - Newegg.com
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