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Extremely Low Frequency Antennas
Antennas for 0.03 Hz to 75 Hz

Extremely Low Frequency Antenna 0.1 Hz - 75 Hz

Compact ELF Band antenna offers high sensitivity and narrow bandwidth.

Directional to help reduce interference and zero-in on desired signal.

Weather-proof plastic case.

Binding post connections.

Monster-size 12.3 inch long x 1.02 inch diameter ferrite rod core for maximum reception.

Part Number: 12ELF01H75HBC is an Extremely Low Frequecy antenna for 0.1 Hz - 75 Hz range, and can be user tuned with external fixed value capacitor user supplies.

If this antenna is used in a moving vehicle and connected to a millivolt meter, the meter will indicate strongly when the antenna passes over a buried iron pipeline or other metal under a roadway when moving at highway speeds. Signals well over 1 volt can be generated depending on the strength of the magnetism in the buried metal.

Makes an excellent seismograph sensor pickup.

Useful for remote vehicle detection via magnetic field disturbance.

Use it to detect people walking thru a door via the magnetic metals and magnets contained in their cellphones, belt-buckles, etc.

Specification: (+/- 10 %), 0.01 uF tunes @ 75 Hz.

0.1 uF tunes @ 26 Hz, 1 uF tunes @ 7.9 Hz, 10 uF tunes @ 2.8 Hz, 47 uF tunes @ 1 Hz.

Part # FrequencyPrice
12ELF01H75HBC0.1 Hz - 75 Hz$ 385.00
12ELF01H75HBC-EB0.1 Hz - 75 Hz$ 395.00

This antenna is also available with EyeBolt loop [ EB suffex on part number ] to allow suspending the antenna above a magnet to make a simple yet powerful seismograph.

Click Here for Data Sheet. Part Number: 12ELF01H75HBC.

DC - 30 KHz Wideband Instrumentation Amplifier for use with these antennas.

NOTE: 12ELF01H75HBC Antennas are 14 inches long.

NOTE: These antennas are bi-directional having a 'figure 8' pattern.


Extremely Low Frequency Antennas 0.05 Hz - 30 Hz
with 12 inch long Solid Mu-Metal Core

Antennas in this range are useful for specialized remote sensing applications.

Compact ELF Low Band antenna offers high sensitivity and wide bandwidth in an easily portable 14 inch long size.

Directional to help reduce interference and zero-in on desired signal.

  • Solid Mu-Metal Core for pulling in weak signals.

    Weather-proof plastic case.

    Binding post connections allow quick hookup to voltmeter terminals.

    For use in

  • ELF reception,
  • seismic research,
  • geologic research,
  • geomagnetic storm detection,
  • ferrious metal detection,
  • remote vehicle detection,
  • EM research.

    If this antenna is used in a moving vehicle and connected to a millivolt meter, the meter will indicate strongly when the antenna passes over a buried iron pipeline or other metal under a roadway. Strong signals well over 1 volt can be generated depending on the strength of the magnetism in the buried metal.

    The antenna will output a DC voltage (in millivolts) when moved through earth's magnetic field, or if earth's magnetic field moves, as happens during a geomagnetic storm.

    Research applications include: Long Range Vehicle Detection, Seismology, Geophysics, Meteorology, Mineral Exploration, Remote Ferrious Metal Detection, etc.

    P/N 12ELF005H30HBC uses a 12 inch long x 0.5 inch diameter Mu Metal Rod core for maximum reception.

    These ELF antennas for 0.05 Hz - 30 Hz range can be user tuned with external fixed value capacitor user supplies.

    Also operates broad-band to pull in the entire 0.05 Hz - 30 Hz range when connected to a high Z pre-amp.

    Detects geomagnetic storms in the range of 0.05 Hz - 0.1 Hz.

    Useful for remote vehicle detection via earths magnetic field disturbance and/or vehicles magnetic metals such as iron or steel.

    Use it to detect people walking thru a door via the magnetic metals and magnets contained in their cellphones, belt-buckles, etc.

    Specification: (+/- 10 %), 0.01 uF tunes @ 30 Hz.

    Part # FrequencyPrice
    12ELF005H30HBC0.05 Hz - 30 Hz$ 499.95
    12ELF005H30HBC-EB0.05 Hz - 30 Hz$ 510.00

    This antenna is also available with EyeBolt loop [ EB suffex on part number ] to allow suspending the antenna above a magnet to make a simple yet powerful seismograph.

    NOTE: 12ELF005H30HBC Antennas are 14 inches long.

    Click Here for a simple 2-transistor ELF Receiver you can build to work with the antennas.

    DC - 30 KHz Wideband Instrumentation Amplifier for use with these antennas.

    NOTE: These antennas are bi-directional having a 'figure 8' pattern.


    Extremely Low Frequency Antenna
    0.03 Hz - 15 Hz

    tuned directional antenna

    Features a greater capture area and a solid mu-metal core and has a weather-proof plastic case with binding post connectors.

    For use in

  • ELF reception,
  • geologic research,
  • geomagnetic storm detection,
  • ferrious metal detection,
  • remote vehicle detection (can detect cars moving 100 feet away),
  • EM research.

    Powerful Mu-Metal core pulls in weak signals.

    Antennas in this range are useful for specialized remote sensing applications.

    Directional to help reduce interference and zero-in on desired signal.

    If these antenna are used in a moving vehicle and connected to a millivolt meter, the meter will indicate strongly when the antenna passes over a buried iron pipe line or other metal under a roadway when moving at highway speeds. Signals over 1 volt can be generated depending on the strength of the magnetism in the buried metal.

    The antenna will output a DC voltage (in millivolts) when moved through earth's magnetic field, or if earth's magnetic field moves, as happens during a geomagnetic storm.

    Research applications include: Long Range Vehicle Detection, Seismology, Geophysics, Meteorology, Mineral Exploration, Remote Ferrious Metal Detection, etc.

    These antennas are also useful for detecting earthquakes by using the earth's magnetic field. The antenna will output an AC voltage in relation to shaking during an earthquake.

    Use it to detect people walking thru a door via the magnetic metals and magnets contained in their cellphones, belt-buckles, etc.

    Antennas are cased in weather-proof PVC plastic with two binding post connections.

  • MU22 is 24 inches long and 2 and 5/8ths inches diameter.
    ELF Antennas
    Part # Radio Band Low Freq Hi Freq __Price
    MU22-01H-15H-BCExtreme Low Frequency 0.03 Hz 15 Hz $ 595.00

    Click Here for Data Sheet. Part Number: MU22-01H-15H-BC.

    Click Here for a simple 2-transistor ELF Receiver you can build to work with the antennas.

    DC - 30 KHz Wideband Instrumentation Amplifier for use with these antennas.

    S/H UPS ground extra.


    Example of a detection of 0.05 Hz ELF sinewave, possibly from geomagnetic storm on Feb 1, 2017, first wave cycle starting at 15:31 UTC. MU22-01H-15H-BC was used to record. Dataq PC chart recorder used from www.dataq.com

    Example of a detection of 2 large trucks on a road 100 feet away from the MU22-01H-15H-BC. Chart speed 2 seconds per division. End of antenna pointed toward road. Dataq PC chart recorder used from www.dataq.com

    Example of a detection of 3 cars on a road 100 feet away from the MU22-01H-15H-BC. Chart speed 5 seconds per division. Broadside of antenna pointed toward road. Dataq PC chart recorder used from www.dataq.com
    SMALL ELF ANTENNA

    For use in

  • Seismographs,
  • ELF reception,
  • Pipeline Inspection Gauge Sensors,
  • remote vehicle detection.

    Detect earthquakes with this ELF antenna, when used as a seismograph pickup. Operates in the range of 0.1 Hz to 30 Hz.

    Build a seismograph or upgrade your seismograph to extreme sensitivity.

    Use this antenna to build a seismograph to detect earthquakes. Its easy: Build the Bucket Seismograph # 5.

    Features a solid 6 inch Mu Metal Core for extreme magnetic sensitivity. 7 inch long plastic case.

    Directional to help reduce interference and zero-in on desired signal.

    Data Sheet for part number 6MU-1H-30H

    Part number 6MU-1H-30H. $ 99.95 + $ 8.00 s/h US Mail.

    DC - 30 KHz Wideband Instrumentation Amplifier for use with these antennas.

    View earthquakes recorded.

    ELF RECEIVER CIRCUIT

    You can build this simple 1 chip ELF Receiver. It is extremely sensitive and works well with ANY of our ELF antennas above on this page

    Parts values shown for tuning to 1 Hz with 6MU-1H-30H for use as a seismograph. This receiver can be tuned from 0.03 Hz to 100 Hz, depending on the antenna's specification tuning range.


    This sensitive receiver uses one IC chip, the LM-741. Output is an AC voltage that can be sent to an analog volt meter or data logging volt meter. Makes an excellent seismograph when used with our 6MU-1H-30 Hz ELF antenna. Other antennas above or below on this page allow for tuning down to 0.03 Hz, depending on antenna tuning specifications.

    PARTS:

    IC1 = LM 741 OP Amplifier IC.
    R1 = 22 K-ohms
    R2 = 10 Meg ohms
    R3 = 10 Meg ohms
    R4 = 22 K-ohms
    C1 = Tuning value needed for antenna. 100 uF for 1 Hz with 6MU-1H-30H.
    C2 = 1 uF
    C3 = 100 uF

    Power the circuit with a 9 volt rechargable battery. The circuit will also work on a 6-volt or 12 volt lantern rechargable battery. Current draw is less than 2 mA for long battery life.

    When the power is first turned ON, allow @ 30 seconds for all the capacitors to charge up before the receiver starts working.

    The circuit can drive analog volt meters back and forth when an earthquake is detected when used as a seismograph (see the link above on this page for plans).

    Connect the output to a data logging volt meter or oscilloscope to allow making graphs of received ELF waveforms. See www.dataq.com for excellent PC data logger hardware and software.

    Circuit modifications:If receiving well below 1 Hz, then change C2 to a higher value, such as 10 uF or 47 uF. This may cause circuit to need more time when first turned ON to begin working, up to 3 minutes or more.

    C3 can be changed to as high as 4700 uF to pass extremely slow waveforms. Again changing this value will require more start up time when first turned ON, up to 3 minutes or more.

    R1 should not be made less than 10 K-ohms.

    If the circuit oscillates ( not likely ! ) then place a 100 uF across the battery terminals.


    Extremely Low Frequency Antenna 1 Hz - 150 Hz
    with non-magnetic core

    For near-field (short range) pickup uses as the sensing coil for use in seismographs and other types of sensor instrumentation.

    Non-Magnetic Core so that magnets will not be attracted to the antenna. Useful in sensitive equipment to detect fields without causing magnetic attraction or greatly changing placement of field lines.

    Compact ELF Band antenna offers high sensitivity for use in seismographs and other near-field magnetic pickup applications.

    Weather-proof plastic case.

    Binding post connections.

    Part Number: NM12-ELF1H150HBC is an Extremely Low Frequecy antenna for 1 Hz - 150 Hz range, and can be user tuned with external fixed value capacitor user supplies.

    Specification: (+/- 10 %), 0.01 uF tunes @ 150 Hz

    Part # FrequencyPrice
    NM12ELF1H150HBC1 Hz - 150 Hz$ 285.00
    NM12ELF1H150HBC-EB1 Hz - 150 Hz$ 295.00

    This antenna is also available with EyeBolt loop [ EB suffex on part number ] to allow suspending the antenna above a magnet to make a simple yet powerful seismograph.

    DC - 30 KHz Wideband Instrumentation Amplifier for use with these antennas.

    NOTE: NM12ELF1H150HBC Antennas are 14 inches long.

    NOTE: These antennas are bi-directional having a 'figure 8' pattern.


    Extremely Low Frequency Antenna 0.1 Hz - 80 Hz
    with non-magnetic core

    tuned directional antenna

    For near-field (short range) pickup uses as the sensing coil for use in sensor instrumentation.

    Non-Magnetic Core so that magnets will not be attracted to the antenna. Useful in sensitive equipment to detect fields without causing magnetic attraction or greatly changing placement of field lines.

    Weather-proof plastic case.

    Binding post connections.

    Part Number: NM24-ELF1H80HBC is an Extremely Low Frequecy antenna for 1 Hz - 80 Hz range, and can be user tuned with external fixed value capacitor user supplies.

    Specification: (+/- 10 %), 0.01 uF tunes @ 80 Hz

    Part # FrequencyPrice
    NM24ELF1H80HBC0.1 Hz - 80 Hz$ 395.00

    DC - 30 KHz Wideband Instrumentation Amplifier for use with these antennas.

    NOTE: NM24ELF1H80HBC Antennas are 24 inches long.

    NOTE: These antennas are bi-directional having a 'figure 8' pattern.


    See our complete line of standard antennas:

    Antennas for Short Wave 1.7 MHz - 4 MHz
    Antennas for AM Broadcast Band 530 KHz - 1710 KHz
    Antennas for Long Wave and 30 KHz - 530 KHz
    Antennas for Very Low Frequency 3 KHz - 30 KHz
    Antennas for Ultra Low Frequency 300 Hz - 3 KHz
    Antennas for Super Low Frequency 30 Hz - 300 Hz
    Antennas for Extremely Low Frequency 0.03 Hz - 30 Hz