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Antennas

Antennas. GPS & Radio. GPS Antennas. Types Patch (less multi-path interference) Helix. GPS Antenna for units without connector. http://pc-mobile.net/gpsant.htm Active Antenna BNC #GAST3B $25.00 MCX #GAST3X $19.90 Re-Radiating Antenna uses 3-AA BNC #GARTB $19.90

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Antennas

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  1. Antennas GPS & Radio

  2. GPS Antennas • Types • Patch (less multi-path interference) • Helix

  3. GPS Antenna for units without connector • http://pc-mobile.net/gpsant.htm • Active Antenna • BNC #GAST3B $25.00 • MCX #GAST3X $19.90 • Re-Radiating Antenna uses 3-AA • BNC #GARTB $19.90 • MCX #GARTX $25.00 • S&H $5.00

  4. Antennas for Handheld Radio • Antenna furnished with radio - inefficient • It is a poor attempt at a 1/4-wave antenna • 1/4-wave antenna requires a ground plane • The case of radio is not a good ground plane • Radio carried against body is attenuated

  5. Improving Performance • Take radio out of chest harness • Hold is so antenna is away from body • Add a Ground Plane wire “Tiger Tail” • An 18” wire attached to the outside of the antenna connector, or • Attache wire to radio case (induction)G

  6. Get a Better Antennaneed an adapter • Need to be able to use a BNC antenna connector • Buy an Adapter from Radio’s connector to BNC(female) • Ham Radio: BNC and SMA • From Vetco, Bellevue, WA • Land Mobile Radio (LMR): many versions • Icom LMR: MX (1/4”-32 x 3/16”) • RFI #RFB1145 $5.12 www.RadioOutfitters.com • Motorola: MX • Kenwood: SMA

  7. Better Antennas • Larsen Kulduckie $22-25 • KD4-146-HQ 144-148 MHz Ham • KD4-155-HQ 155 MHz SAR & Ski Patrol • These antennas can be ordered with many different connectors • Better than antenna that came with radios • Ham Dual Band 2m/70cm long antenna

  8. Better Antennas • Larsen KD-14-2M-HW Telescopic 1/2-wave Antenna • 1/2-wave antenna does not require a ground plane • This antenna can be lengthen or shortened to be tuned for frequencies from 144-177 MHz • Con: do not leave permanently attached to radio • Inflexible • Can damage connector in radio • MSRP $39, $29.95 @ Universal-Radio.com • Do not get 5/8-wave telescopic antenna • Require a ground plane

  9. Best Antenna • MFJ Enterprises • #1730 Pocket Roll-up 2 meter (145 MHz) 1/2-wave J-antenna BNC $2

  10. Vehicle Antenna • Need a Magnetic Mount Antenna • MFJ-1721 UltraLite 2 Meter Magnetic Mount Antenna, w/ 9-ft RG-174U, BNC $15

  11. Sources • www.mfjEnterprises.com • www.RadioOutfitters.com • www.Universal-Radio.com • www.HamRadio.com • www.AESham.com • www.tessco.com • Vetco Electronics, 12718 Northrup Way NE, Bellevue, WA www.vetcosurplus.com

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