Extra Long 49" whip extends your tracking range even further.  This antenna magnet is larger and more powerful.  Using an NMO mount antenna cut to the frequency that the Garmin Alpha and Astro uses will give you the best range.

Connector:  Connector is Compatible to be used with the Garmin Alpha and Astro.   No adapters are needed!

14Ft of Cable.

If you are looking for an antenna that can be used for both Marine and the Alpha or Astro, Please select the PL-259 connector with the adapter which will allow you to connect it to the Astro.

Choose to add a Spring for additional flexibility to minimize the chance of your antenna whip snapping

This Product Uses a 5/8 Antenna

This product has an Uncut whip lenght of 49in

Tuning this antenna:   Please Note: When you select Garmin from you intended use,  Double U will Cut the Whip for 151 Mhz accordingly to the manufacture Cut Chart.    43 Inches with a spring or  45 5/8 for applications without a spring.   Useing these cut requirements should perform well for Garmin However it allows the customer the ability to Fine tune their antennas using an SWR antenna analizer to acheive a Meausre Best case SWR.   If the customer would like to fine tune this antenna we suggest tuning at 153/154 Mhz which may require a additional triming. 

If the customer would prefer to Tune their own antenna Please select Uncut or VHF/Radio applications as these are sent to the customer at 49 inches and the customer is expected to cut them accordining to a SWR analizer, or the manufacures cut chart.

• 5/8 Wave
• 144-174Mhz Frequency Range
  
• 3dBd Gain  (approximately 5.15 dBi)