The 3-foot-wide base Alpha Loop that covers 10 to 40 Meters is remotely tuned and rated at 100 watts PEP SSB, 50 watts CW, or 25 watts digital, which are each based on duty cycles.
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This stealthy magnetic loop antenna with direct wire remote control is a tuned circuit, so there is no need for radials or counterpoise. Perfect for Attic, *Mast, EmComm Trailer, or anywhere when reliable and quiet communications is required in a small space.
Included
- Matching network that is remotely and manually tunes the antenna.
- Remote control with power supply.
- 50ft of coax and 50 ft of remote-control cable.
- Inner Loop with SO239 for connecting the antenna to your equipment.
- Outer Loop with a circumference of 8′ 6″, which has a diameter of 3-feet.
- Mounting hardware (2- 16 inch cross supports, top & center mast mounts, and u-bolts, which brings all the components together and *installs on your mast that can have a diameter up to 1 1/4 inches.
Helpful Tips
- Minimum mounting height is 1 loop diameter high (about 3 feet or higher).
- Alpha MagLoop antennas can be placed high enough to see above and past obstacles.
- Attic installations with asphalt shingles typically see only a little more than 1 S-Unit of loss.
- Can be mounted horizontally on *your mast to enhance Omnidirectional and NVIS performance.
- Total maximum tuning time from 7.0MHz to 29.7MHz is 90 seconds when the tuning speed knob is turned completely to the right.
- Pressing and Tapping the Left or Right button allows for remote and manual tuning of the loop.
- Click Here for the bandwidth and tuned results.
- *Third party mounting option: Amazon.com: Outdoor 1 1/4″ Diameter, 5′ 6″ Arm Length mount.
- If you experience a louder than expected noise from the power supply or when tuning the loop, you may do one or all three of these things:
- Use the remote power cable to form loops through a solid mix type 31 ferrite core.
- Ground the barrel side of the BNC Connector on the remote-control unit.
- Flip the power supply of the remote control over where it plugs into your power strip. Ensuring that the plug is oriented correctly for grounding can lower the noise floor. This is of course reliant on your home’s outlet being wired correctly for a ground on the two-prong outlet.
Radiation Patterns
The Alpha Loop exhibits overlapping radiation patterns in the far field, reducing the impact of nulls when communicating with stations beyond the immediate area of operation. Additionally, it maintains a directional null through the center of the loop, which is advantageous for effectively minimizing local noise sources.
IP 65 Rating
The enclosure at the antenna that contains all of the tuning hardware is dust-tight and protects against water jets from any direction from damaging the internal components.
Remote Tuning tips
- It takes approximately 40 seconds to tune from 40 to 10 meters with the Speed control knob turned right. By performing this step, you may set the capacitor at either the high or low tuning range. This makes it easier to know if you are tuning Up or Down.
- If you don’t have any idea what frequency you are on, then pressing either the left or right button for 90 seconds resets the loop to either the lowest or highest frequency.
- Tapping the left or right button on the magnetic loop’s remote control allows for incremental stepped tuning.
- Make a note on whether your loop is either tuning up in frequency or down in frequency when pressing either green or red button, as the circuit can send a forward/reverse command that is dependent upon how your wall-wart is plugged into the wall.
- NOTE – There is a clutch between the motor and the capacitor, which lets the motor continue to turn without being damaged.
Options
The ARS4X4 Military antenna mast and tripod
Deployment examples
The ARS4X4 Military antenna mast and tripod can be adapted for the Base Loop by installing the hardware in Step 3 on the Leg of the tripod and the Hardware in Step 1 on the Mast of the tripod. An additional mast can also be purchased at any hardware store. This mast would consist of a Grey Electrical PVC Pipe that can be installed in lieu of the included mast that comes with the ARS4X4 tripod.
Assistance
FAQs: Alpha Loop MagLoop antenna
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Specifications, prices, and descriptions are subject to change without notice.
Fantastic service and support
Extremely happy with this magnetic loop antenna. Remote tuning also does away with annoying hand-capacitance effect! Build quality is up to the usual excellent standards we have come to expect from Alpha Antennas. At present using it indoors experimenting with WSPR and putting it through its paces.
Wow! Pair this with an antenna analyzer and it works very well indeed. I’ve been using it for a few days on 40m at works well for both phone and FT-8 using only 20 watts. I’ve got no regrets on this purchase.
Having fun learning how to use and really impressed with the antennas performance. Thank you for your excellent service and consideration.