Alpha MagLoop HF Magnetic Loop, VHF/UHF Optional Portable Antenna User Manual
- June 3, 2024
- Alpha
Table of Contents
Alpha MagLoop HF Magnetic Loop, VHF/UHF Optional Portable Antenna
SPECIFICATIONS
- MAXIMUM POWER: 10-40M or 6M, 2M & 440MHz 100W SSB, 50N CW, or 10W digital
- MAXIMUM POWER: 40-80M- 20W SSB 10W CW, or 5W digital
ASSEMBLY& TUNING
- Screw the Center Support Mast onto the tuning box.
- Ensure the black Coax Mounting Clips are installed above the Rubber Grommet on thee Center Support Mast.
- For 10-40 Meters; Screw the shorter outer loop’s PL-259 connectors onto the SO-239 ere either side of the tuning box. Insert the outer loop into the slot of the DiaCk oas Mounting Clip located at the top of the center support mast. .2) For 40-80 Meters: Connect the two longest elements (Default outer loop & Booster cable) in series with the Barrel Connector. Form a double loop and secure it with multiple black nylon coaxial clips. Screw the two PL-259s on either end of the double loop onto the two S0-239s on the tuning box. Then place one of the concentric outer loops into the top slot of the black Coax Mounting Clip with two slots and the other double loop in the bottom slot.
- Insert the small Feed Loop into the slot of the bottom most black Coax Mounting Clip.
- Attach your feedline to the SO-239 on the t-connector on the small Feed Loop.
HF TUNING: Start with MINIMUM power & select your frequency, then turn the black knob on the grey Alpha Match till your rigs meter peaks with the loudest audible noise floor. Second, watch your SwR meter dip as you Fine Tune the loop.
NOTES: It also takes about 3 full turns of the tuning knob to fully cycle the variable air capacitor, at which point there is a 30% friction clutch that enables the knob to keep turning without causing damage to the reduction gears. Also note that the Coax Mounting Clip with the small Feed Loop can be moved up or down the center support mast to lower SWRs.
OPTIONAL 6M, 2M, 440MHz ELEMENT
See https://youtu.be/LJOHxOnHLXE
- Remove the t-connector from the small inner feed loop.
- Re-connect the t-connector to the coax end that has a soldered pin in its’ PL259
- On the PL259 without a soldered center pin, attach the barrel connector of the 6M, 2M, 440MHZ add-on element.
- Form a single loop with these coaxial elements.
- Secure the end of the add-on element to the coax of the inner loop using a nylon coax clip.
- Tune by sliding the element in and out of the nylon coax clip.
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