2017 WR-3 Model ELF/VLF "Natural Radio" Receiver

Complete Information Herein about the 2017 WR-3

The WR-3 Natural ELF-VLF Radio Receiver is available to the world, and I wish to really thank everyone for your continuing interest in my WR-3. Further information about the WR-3 VLF Receiver is below. The WR-3 has been very popular in 2016 and now in 2017, as in all previous years too since 1991! (Please allow for 4 to 6 weeks delivery time, as the WR-3 production is a secondary business and a labor of love - my main work can take me away from the lab for a few weeks at a time), as I think this is a very fine portable, hand-held whistler-receiver!)

The WR-3 Receiver Order Form Page is at this link.

WR-3 Receivers are field-tested - as always - in an electrically-quiet location in the nearby Mojave Desert on my radio-expeditions, or in the semi-quiet back-field behind my shop/lab, for maximum quality checking upon completion of construction and to ensure they are functioning to my high-specifications (I've been listening to/audio-recording ELF/VLF Natural Radio since June 1989).

Thank you very much for your past orders also to my repeat customers and WR-3 enthusiasts - The WR-3 has been quite popular globally this past year ended (23 nations in 2014 and a similar number in 2015, 2016, and now in 2017). I am very thankful to all whom are globally listening to VLF via my WR-3s! I meet the coolest people in this field of radio and audio interest. What also pleases me is the number of WR-3 users venturing to remote regions of the globe (especially within the auroral-zone regions) on their own ELF-VLF listening/recording expeditions to check-out the local VLF-conditions and phenomena -- THANK YOU! (S.P. McGreevy, 14 January 2017)

Made since since September 1991: The Original popular WR-3 is still in production of course, but in a much nicer-looking painted-black enclosure and BNC-antenna jack (the former, original WR-3s were in unpainted aluminum enclosures and had a screw-type antenna mount and were supplied with a shorter antenna).

I try to turn-around orders as soon as is possible (usually about 4-6 weeks average) despite having to do some travel and radio expeditions frequently done (for my own research, and other consulting work I do) -- WR-3 receivers are tested on my radio-expeditions as well.

All receivers are field-tested as said just above - sometimes I bring them along on radio-DX trips or science expeditions, and test them in a very-quiet (no powerline noise) location to see how they function (such as testing for reception of the Russian ALPHA transmissions beeping between 11-14 kHz) before sending them out--this is the way I can be certain you will receive your WR-3 knowing it has been field-tested to my satisfaction.

Based upon the considerable popularity of the WR-3 again in 2016, I believe just about everyone is happy with theirs--I have not received a return-request in many YEARS. The recordings on my websites and in the Internet Archives albums attest to the decency of this little hand-held whistler receiver and my ELF-VLF receiver designs overall, using simple, commonly available electronic parts/components, too.

(Seven natural-VLF-radio MP3 albums, Electric-Enigma, and Auroral Choruses 1, 2, 3, 4, and 5; and Alberta August 2000 Solar-Max. VLF EXpedition (stereo) are now available online at www.archive.org (Internet Archives - based in San Francisco, California).

And so, a big *thank you* all for your interest in this pocket-portable VLF receiver. It continues to be a popular hand-held/pocket VLF receiver as of today, and I wish to thank all of you whom have already been enjoying the fascinating realm of VLF radio via the WR-3 Whistler Receiver for these many years since September 1991. I have tried to hold the WR-3 price (USD135 plus postage - as shown further below) down for a while (since 2007), but prices of components, the enclosure, and especially shipping-costs keep mounting due to economic-monetary inflation/devaluation. I will keep the WR-3 Receiver and circuit-board-option prices the SAME throughout 2016 as it was in 2015 and earlier.

Each WR-3 Receiver comes with an excellent Smiley-Antenna Inc. "Superstick II" telescoping-whip antenna with BNC-base (10-section, 54-inches/138 cm in length - actually designed for 2-meter ham-band use as a 5/8-wave antenna with small series-loading coil, but it works great with the WR-3), and an alkaline 9v battery that powers the approximately 7 to 10 mA power-draw WR-3 circuit for about 20 hours.

To learn more about this WR-3 "whistler receiver" please read The WR-3 Listening Guide link right below or click this link. It should answer most questions you may have.

By the way, the frequency-response of the WR-3 is from about 50 Hz to 14 kHz (audio-passband roll-off below 100 Hz and above 8 kHz). It does not cover less-than 50 Hz, i.e. ULF frequencies - it is made strictly for natural-VLF-radio-emissions from lightning storms and the Magnetosphere between 50 Hz to about 14 kHz - you can hear ALPHA-Radionavigation (beeping-sounds) transmissions with it too, and the noises of the electrical-grid and appliances.

NEW back in 2010: WR-3D circuit-board and potentiometer (only) stuffed with all necessary components and tested on the workbench before I ship. You supply the enclosure, etc. - $65.00 Shipments of just the completed circuit board (inspected and bench-tested thoroughly and carefully) can generally be made faster than fully-constructed and remote-field-tested WR-3s.

Stephen P. McGreevy

The Original WR-3 VLF Receiver now in a black-painted enclosure:

WR-3 Specifications and info. page 1 of 2

WR-3 Specifications and info. page 2 of 2

WR-3 Listening Guide - HTML version

About the Smiley Antenna "Superstick II" Antenna that I supply with each WR-3 Receiver

Dueling VLF Receivers taken in the mountains of Portugal - Whistlers are a global phenomena.

I test WR-3's in a lovely radio-quiet location to see they all work best before sending out to customers - S.P. McGreevy, July 2010.

An insider's view of the WR-3 VLF Receiver - S.P. McGreevy - N6NKS, September 2010.

(Please allow for 3 to 4 weeks delivery time, as the WR-3 production is a secondary business and a labor of love, as I think this is a very fine portable, hand-held whistler receiver!)

The WR-3 Receiver Order Form Page is at this link

WR-3 Model ELF/VLF "Natural Radio" Receiver notes - Part 2:

A nice September 2010 WR-3 Receiver testimonial from a happy WR-3 listener (KK5QZ):


WR-3 Receiver: A great 14 September 2010 note from KK5QZ:

Dear Stephen,

I received the WR-3 radio you built for me today and just wanted to share my experience with you. Today I drove out to a place called Little Mountain on the Natchez Trace Parkway in Mississppi, turned off my car, plugged in some iPhone earbuds and then the WR-3. Initially the earbuds literally buzzed in my hand after I turned on the receiver; I'm glad I did not have them in my ears, but I had read your website and knew to be careful about this.

After adequately grounding the radio (or was it just hand capacitance?) the earbuds stopped buzzing and I carefully put them in my ears. I heard a slight bit of power-line hum and numerous noisy sferic-like chattering, which I attributed to some large machinery a few miles away - I think there's a top coal mine over that way and figured that is what it was.

I moved the radio to the other side of parking lot and things settled down nicely. I then could hear some actual sferics, but they were quite distant I'm sure - the weather in the southeast is now very calm so I figured it was from some thunderstorms in the midwest. I never heard any whistlers or anything quite so dramatic, except for insects flying near the antenna. Later I moved to another location further north on the Trace, and tried again. This time there was quite a bit of powerline hum; I was sitting in my car with the antenna propped on the plastic side-view mirror enclosure and the radio resting on my left bare leg. After I placed my hand on the side of the car outside the hum disappeared entirely. Ahh...properly grounded, I think. Then faintly I hear what sounds like an alarm clock beep beep beeping just above the noise floor. I'm not sure what it was, but I timed and counted and came up with between 220 and 240 beats/beeps per minute. After about 10 minutes it abruptly stopped.

My next venture will be in the backwoods of Georgia later this week. Hopefully I'll be able to get in some early morning listening and maybe catch a dawn chorus. I'm sure all of this is old hat for you, but as you can tell I'm excited by this new radio and proud to have something made by a fellow ham, no less! Excellent job, Stephen - thank you!

= 73

Garen Evans, KK5QZ

Josh's 'first-whistler" recorded on a WR-3 at beautiful Stinson Beach, Marin County, California, 23 May 2010.

I recall hearing my first-whistler(s) in eastern Oregon (the Alvord Desert) in June 1989, and the total thrill of it too! THANKS JOSH! SpM - 19 September 2010.

Sally with sleepy mate on a remote island near beautiful New Zealand with her WR-3GX receiver - winter 2011 (Down Under)

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