Product Overview
Three-foot base magnetic loop for 10-40 meters with direct-wire remote tuning and no radials/counterpoise requirement.
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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.
Key Specifications
| Specification | Details |
| Coverage | 10-40M |
| Power | 100W PEP SSB; 50W CW; 25W Digital |
| Outer loop | 8 ft 6 in circumference / ~3 ft diameter |
| Remote/control cable | 50 ft |
| Coax | 50 ft |
| Enclosure | IP-65 |
| Shipping weight | 10 lb |
Best For
- Attic and limited-space base installations
- EmComm trailers
- Operators wanting remotely tuned 10-40M loop operation
What’s Included
- Remote/manual matching network
- Remote control + power supply
- 50 ft coax + 50 ft control cable
- Inner loop with SO-239
- 3-ft outer loop
- Mounting hardware, installs on 1 1/4 inch mast.
Setup and Operation
Mount at least one loop diameter high (~3 ft). Remote controls permit coarse and incremental tuning; maximum end-to-end tuning time is published as 90 seconds.
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.
Deployment examples
Options and Compatible Accessories
Base Loop Tripod and Mast Kit is offered as an option.
Support Resources
- User Manuals: Alpha Antenna User Manuals hub.
- Videos: Related videos.
- Guidance / FAQs: Available HERE.
- Customer Reviews: Scroll to bottom of this page.
We Listen
We are dedicated to improving all of our systems. Specifications 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.