10-80M LT-FMJ Antenna
The Alpha LT-FMJ HF Antenna is rated at 500W PEP SSB fits in an included 16 inch Field Bag. This multipurpose antenna that is pre-tuned requires no moving clips on coils or readjusting of whips for tuning. You may also use an external antenna tuner if your antenna is installed over a poor ground or not placed in a clear area.
The Alpha LT-FMJ HF Antenna fits in an included 16 inch Field Bag. This multipurpose antenna that is pre-tuned requires no moving clips on coils or readjusting of whips for tuning. You may also use an external antenna tuner if your antenna is installed over a poor ground or not placed in a clear area.
Purpose: When fully deployed with the NVIS, Vertical & Grounded Counterpoise elements, the antenna system can be configured to launch your signal at your target in the opposite direction the NVIS element is run. For an omnidirectional signal pattern, you may remove the NVIS element.
Installation Note: Never Remove or Loosen any of the Bolts, Washers, Nuts, or Caps on the Alpha Match.
History: Years of perfecting the manufacturing process has enabled Alpha Antenna to offer the worlds most refined & resilient antenna, which is now in use by NASA and military forces around the globe.
Function: For targeted rapid deployment of ALE/Digital/CW/SSB/AM modes. The LT-FMJ enhances high band DX with the Vertical MilStick element while low band Near Vertical Incident Skywave is simultaneously enhanced with the NVIS element, per the antenna model at the bottom of this page.
1 – 16x4x4 inch Compact bag holds all of the following, but not the optional tripods:
1 – Alpha Match encased in a FMJ (Full Metal Jacket) 316 Stainless Steel and weather proof housing that shields all internal components from all RFI (Radio Frequency Interference).
1 – MilStick whip made from .433″ thick 13″ aluminum sections
1 – 8 foot ground wire with ground stake
1 – QUICK Deployment Riser on Stainless Steel Jaw Mount=No loose hardware
1 – 25 foot NVIS element wire with green insulator and removal stake
• Frequency: 10M – 80M
• Peak Power: 500 PEP SSB, 250 CW, or 100 watts of sporadic use for digital modes (50 watts continuous for digital modes)
• RF Connection: SO-239
3D Model of the Alpha Antenna® FMJ system mounted at 6 feet
SWR Analysis of the LT-FMJ antenna
Touch free operations: The FMJ system enables you to switch bands or change frequencies without having to chance switches, jumpers, or coils.
Increased ERP (Effective Radiated Power): The electrically balanced OCF circuit of the FMJ line of systems has an increased ERP over the base fed vertical (end-fed) antennas that use lossy matches to force low SWRs.
Directionality is a unique feature to the FMJ line of systems: The combination of a Vertical element with the NVIS and Grounded Counterpoise elements provide for a directional antenna system that enhances lower take off angles for increased DX communications, while simultaneously enhancing NVIS (Near Vertical Incident Skywave) for stateside communications.
The Alpha Match is a balanced 316 stainless steel housing: The Alpha Match now has a stainless steel housing that is lined with a dielectric, which the transformer is placed inside of. This is what gives the Alpha Match both the capacitive and inductive balance once the elements are installed. The main difference between legacy designs, which are black and made of either a plastic Delrin or PVC, is that those older designs do not have capacitive characteristics. This is what enables the Alpha Match to balance the entire antenna system once the elements are installed. It is important to note that the Alpha Match housing is made of 316 stainless steel, which has non-magnetic characteristics to eliminate eddy currents.
Electrically conductive Industrial strength MilStick whip: The composite of the .433 inch diameter MilStick whip is a high strength, high quality, aerospace 7075-T9 alloy 13 feet long. The construction of each element has a scratch-resistant hard-anodized surface. This surface is fully removed from each insert and also removed 2.5 inches inside each element. The inserts are then electrically bonded, where full contact RF continuity and connectivity is used to ensure maximum efficiencies are achieved. At the base of the whip an embedded 8740 Steel (chrome moly) cadmium plated stud supports the MilStick on the Alpha Match.
Memory free industrial Wiring is used: Sheathed memory free wiring is used, which is rated for temperatures from -40°C to +75°C vs wiring that is so light duty that it can be wrapped around a kite string holder.
A Padded Field Bag: The various sized padded field bags for the Alpha FMJ systems are made from 600D nylon, which includes an embroidered logo and high quality zippers. This highly customized bag also has a padded front pocket and a padded larger inner compartment, plus a shoulder strap with padded shoulder pad.
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|Dimensions||13 × 13 × 5 in|