VLF Receiver

Model AR1 v2


  Version 2 is now available with a new case design and soft rubber hand grips. Originally made popular by the “Inspire”  project, atmospheric listening has become an accessible pass-time. Built on the research of these early receivers, the AR1 offers superior noise cancellation for trouble free listening even in electromagnetically noisy areas such as urban homes. A high quality audio chip set gives the best sound experience possible.  The revolutionary loop antenna allows the unit to be truly portable for field work, or for instant listening pleasure in the home. Discover the magic of the Earth’s natural sounds.

  • listening to natural atmospheric sounds
  • capturing whistlers and tweaks
  • listening to auroral chorus and sferics
  • lightning detection for storm chasers
  • Zigbee enabled home automation
  • high sensitivity VLF electrosmog identification
  • electronic "hash" evaluation
  • Identifying low EM environments for sensitive equipment 
  • AC harmonics analysis
  • Dirty electricity finder
  • paranormal investigation
  • ufo detection
  • magnetic anomaly identification
  • VLF weather modification research
  • Bugs and hidden transmitters


  • Frequency response: 600Hz to 35Khz at - 3bB
  • Power range:           200x to 20,000x
  • Volume range:          0- 20dB (10x)
  • Sensitivity range:      1uV sense, Noise floor -40dB
  • Output:                    1.75V RMS AC coupled
  • Connector:               1/8" stereo/mono phone jack
  • Lightning distance:    >3200km (2000 Mi)
  • Loop Antenna:          400 turns 3.5" x 5", 560 ohms
  • Operating temp.        -10C to +40C, 14F to 100F
  • Battery life:               9V Duracell, approx 20 hours

Using the AR1

Outdoor enthusiasts will find the AR1 just as friendly as those who wish to use computer recording and capture. Separate controls for receiver power and audio volume allow for optimal adjustment to any application. An audio output jack allows for the use of headphones, connection to a computer audio line-in or sophisticated recording devices such as oscilloscopes and data acquisition systems. For long term recording, an external power adaptor connection is provided. External antennas can also be used for special applications or research work.

Connecting a computer

The AR1 output head phone jack can connect directly to the line input of most  laptop or desktop computers using an extension cable. Free capture software such as Audacity or your favourite sound software can be used to record and display events from the AR1. In this way, distant atmospheric events or local phenomena can be recorded for playback or analysis. Real time graphing is available using the Audacity interface.