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MegaLoop FX Active Loop

Product number: 00388

H-Field Loop Antenna: The MegaLoop FX is an active loop amplifier for the range from 9kHz – 180MHz

449,00 €/piece
Weight: 0.75 kg
This item is not on stock and has to be re-ordered. Available on 2020-11-15

MegaLoop FX Active Loop Antenna

Probably the most flexible active loop antenna

  • Ultra broadband frequency range from 9kHz - 180MHz
  • High dynamic range with an IP of typ. +40 dB and IP 2 of typ. +85 dB
  • Power requirements: 5V - 15V
  • Selectable FM band stop filter with low pass function
  • Selectable amplification in three steps
  • Various radiating elements and sizes can be used
  • Indoor and outdoor use
  • Additional ground terminal (M5) on the enclosure
  • High-quality craftsmanship; splash-water proof enclosure; all screw terminals made of stainless steel
  • Small packaging = small shipping costs
  • Ideal for outdoor use because dismountable and USB power supply

The Megaloop FX is our latest active loop amplifier for the 9kHz to max. 180MHz range. It combines  all the outstanding features of the successful MegaLoop ML 200 and ML 052. Due to its integrated selectable FM band stop filter and the three-step amplification a maximum of flexibility for all kinds of use is possible.

Flexible range of application

This broadband magnetic loop antenna is especially suitable for places with difficult reception due to electrical interferences (E-field) in the near-field area, it is also made for indoor use or on the balcony/patio. You can put it up in the attic, at the window, on the balcony, in the carport fixed to the wall or permanently attached to a mast.

Flexible FM-band stop filter

Based on the well proven MegaLoop platform, an additional low pass filter and a FM-band stop filter were integrated which can be activated or deactivated with a jumper. In case of FM-interferences, the FM bandstop filter can be activated with a jumper and so FM signals between 88 MHz and 108 MHz will be attenuated by 25 - 40 dB.

Flexible three-step amplification

The gain of the MegaLoop FX can be adjusted in three steps by an internal jumper (High/Medium/Low)
Frequency response (-3dB) and nominal amplification.

a) FM-band stop off
1. High Gain: 9 kHz - 110 MHz and 25 dB gain
2. Medium Gain: 9 kHz - 150 MHz and 20 dB gain
3. Low Gain: 9 kHz - 180 MHz and 15 dB gain

b) FM- band stop on:
1. High Gain: 9 kHz - 52 MHz and 25 db gain
2. Medium Gain: 9 kHz - 60 MHz and 20 dB gain
3. Low Gain 9 kHz - 66 MHz and 15 dB gain

Flexible loop sizes

The MegaLoop FX makes the most diverse radiating elements possible. As standard, a loop made of flexible PVC-coated and seawater-resistant (V4A) stainless steel wire is available. It comes as a 5m (16,40ft) circumference loop for indoor and portable as well as for outdoor use. Other lengths, such as 10m (32,81ft), are on offer. Even lengths up to 20m (65,62ft) have successfully been tested.

Additionally, an aluminum rigid loop with a diameter of 40 cm or 80 cm is also available. Due to its versatility and adjustment of amplification, there will always be an ideal combination of the loop size and amplification.

Excellent IP values with power supply as low as 5V

With two signals in the 7 MHz range, an excellent IP3 value of typ. +40 dB and a IP 2 value of +85 dBm is achieved with mere 5 V ( max. 40mA) and so the loop can be powered via USB or power bank. A DualPower power inserter (bias tee) supply is included in the standard scope of delivery.

The MegaLoop can be operated by two different kinds of power sources. It can be powered either by a conventional plug power supply (5,5 / 2,1mm round plug) or optional Cable via USB. Powering via USB has the advantage that no external power supply is needed and that the antenna can be operated independently and noise-free with a separate USB PowerBank. The supply voltage range is 5 - 15V DC (40mA max) and thus the antenna is also well suited for portable use.

Integrated threefold surge protection of the active parts

Coarse protection by gas arrester with 60V trigger voltage and a max. pulse leakage current of 1 kA (8/20µs) and by twofold additional integrated fine protection of max. 2 kV and 8 kV respectively. Additionally, the loop connections are connected to ground with high impedance to avoid static charges.

Low shipping costs - no bulky item !

Since the antenna can be shipped as such a small parcel, there will only be standard postage and when ordering a rigid loop of 1m or 2m diameter you will already save about 35,-€ compared to shipping as a bulk item.

Hint: With two suction cups you can attach the MegaLoop antenna to a window at home, in a hotel or when on the road. Because of its flexible loop, transportation is really a piece of cake. In our newsroom test " Design of a really portable SDR Part 2" I simply put the loop over the tailgate of our Caddy and was able to receive signals beautifully.

You want to test the MegaDipol MD300DX live on air?

Try the MegaDipol live on Websdr!

If you would like to test the MegaLoop FX live, you can now conveniently do this over the Internet with a KIWI SDR. Just click on this Link and you can browse the whole band from 10kHz to 30MHz. The linked KIWI-SDR with MegaLoop and 6,8 Meter Loop is located in northern Germany and can handle up to 4 users at a time.

Scope of delivery

  • MegaLoop FX
  • 5m (16,40ft) PVC-coated, seawater-resistant stainless steel wire.
  • Power supply CPI 1500DP
  • Manual

Made in Germany


Near the sea or in case of possible contact with salt water we strongly recommend the use of our weather protection case.

Please note!

The offered coax cables are custom-made and therefore not returnable / refundable.
Frequency Range
9kHz - 180MHz
Selectable: 25dB (High) / 20dB (Med) / 15dB (Low)
+ 40dBm
Power consumption
Power Supply
5 - 15 Volts
Connection of power supply
USB and 2,1 mm connector
Power supply via USB possible
Application range
Indoor / Outdoor
Radiator length
from 5m to 15m
Junction Box
CPI1000DP DualPower
Made in Germany
Ridged Loop 78 cm

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