The 10 through 80 meter Alpha Magnetic Loop is the solution to many issues that real people face. Consider how other portable MagLoops lack the design to handle 100 watts and then try and compensate for it with devices or marketing fluff.

The Alpha Loop is the one MagLoop that is designed well enough to take the power that modern day rigs are capable of producing.

Think about it: Only Alpha Antenna takes the time to build a shielded inner faraday feed loop, which shields the inner pick-up loop from RFI (radio frequency interference).

So, stop using messy poorly designed antennas that require huge whips, taps, or tangled up wires; and start using a tuned circuit! Making this antenna especially useful if you have a disability such as being mobility or sight impaired.

Included:

• 10-80M Alpha Loop is a tuned circuit, which consists of:
  • 2 – Masts that couple together and are approximately 16 inches each plus coax mounts
  • 1 – 40/80M Booster Mast that is approximately 12 inches long
  • 1 – Tuning box with Female 1/4 20 mount
  • 2 – Outer loops (One for 10-40M and the second for 40-80M when daisy chained with the first.)
  • Inner loop with t-connector and SO239, which your coax feedline attaches to
• Field Bag for the Alpha MagLoop
• Total Weight 3.7lbs (60 ounces or 1.7Kg)

Specifications:

• *100W PEP SSB, 50W CW, and 10W digital on 10-40 meters, or 6 Meters, 2 Meters & 440 MHz using the optionally available add-on element
• *20 Watts PEP SSB, 10 Watts CW, and 5 Watts Digital on 40-80 meters with Booster Cable. Continuous coverage from 3.5 MHz to 7 MHz (NOTE – Booster Cable installs in Series with the Outer Loop).
• IP Rating: IP-53 – Protected against dust limited ingress, no harmful deposits. Protected against direct sprays of water up to 60 degrees from the vertical.
• Environmental operating parameters: -15 to 90 (in direct sunlight) degrees Fahrenheit and winds up to 35 Mph

NOTE: The system operates independently for either 10-40M, 40-80M, or 6/2/70cm by adding or changing elements.

Summary Analysis:

Real world SWR results on 10-80 meters shown at the center of each band without additional adjustments being made with spacing between the inner & outer loops, at a height of one loop diameter.

Materials Used:

The following materials are used in the construction of the Alpha Loop antenna:

• Gold,
• Solder,
• Nylon,
• Ceramic,
• Aluminum,
• Stainless steel,
• Marine shrink tubing,
• Times Microwave LMR400, and
• 3D Carbon Fiber infused polymers.

Components and Assembly of the Alpha Loop v2.0

How to tune the Alpha Loop.

There is a huge tuning knob that makes adjusting the loop for the lowest SWR very easy.

Attached to between the knob and capacitor is a 6:1 reduction drive, which increases ease of tuning even more.

To tune the antenna once it is deployed, just turn the knob while listening for the loudest noise floor in SSB mode, and then transmit at 5W in FM or CW mode while you tune and watch for the minimum SWR on your rigs built in meter.

Installing the Booster Cable for coverage of 40 to 80 meters.

Install the Booster Cable as a double loop to form an outer loop that is over 21 feet in total length, which increases skin effect thereby increasing efficiency.

How to Increase Efficiency on 12-40 meters.

Increase the efficiency by over 20% on 12-40 meters at75W PEP SSB, 35W CW, or 15W Digital. Just use the included longer Booster Cable in lieu of the shorter Default Outer Loop.

How did we make a 100-watt MagLoop for 10-40M?

How did we accomplish 100W power levels on 10-40M? We perfected each component which enables the antenna system to handle 100 Watts PEP SSB on 10-40 Meters. NOTE – Maximum PEP SSB on 80M is 20W.

How did we enable VHF UHF on the Alpha Loop?

How did we enable support for VHF UHF? Our engineers designed resonance on 420-450MHz and 144-148MHz plus 50-54MHz with an add-on element.

SIGNAL PATTERNS

Green = 40 meters, Blue = 20 meters, Red = 10 meters

Vertical Elevation Pattern

Azimuth Elevation Pattern

OPTIONS For the Alpha Loop

A) Optional SWR Indicator

This SWR Indicator is a simple device for Magnetic Loop MagLoop antennas that makes tuning even easier.

WARNING!

Do not exceed 10 Watts Continuous Carrier (FM, Digital, AM, etc.) while tuning or the indicator lamp will fail.

Can be used on higher power loops only if the SWR Indicator is removed after tuning.

INSTRUCTIONS:

1. Install by attaching the Copper Clip to either of the PL259s at the loop’s tuning box.
2. Set your rig to the desired frequency in SSB mode
3. Tune loop till the loudest noise floor is heard from your rig’s speaker.
4. Set rig to FM or CW mode at 5 watts.
5. Transmit and tune for brightest illumination on the SWR Indicator’s LED.

B) Optional SWR Sounder

Place the SWR Sounder near any magnetic loop antenna and listen for the loudest beep as you tune for the lowest SWR.

C) **Optional VHF/UHF/6 Meter add-on element

Optional add-on element to enable 100W Magnetic Loop Antennas to support additional VHF & UHF plus 6 Meters, 2 Meters, and 440 MHz.

• Gain on 6M = 1.6dBd, VHF = 4.5dBd, and UHF = 7.2dBd

VHF/UHF/6 Meter element Installation/Tuning

6M, 2M, 440MHz Analysis

6 Meters (Click for full-size image)

2 Meters (Click for full-size image)

440MHz (Click for full-size image)

We are dedicated to improving all of our antennas. Specifications and descriptions on the Alpha Loop antenna are subject to change without notice.