Many links at this site open in new tabs or windows. If they don't work, please set your pop-up blocker to allow lwca.org to open windows, or else right-click the link.
FCC Acts on LF-MF Rulemaking
After nearly two years of public comment and deliberation, the Federal Communications Commission has implemented the WRC 2007 and 2012 recommendations for amateur service use of the 630 and 2200 meter bands. The new rules will become effective 30 days from publication in the Federal Register, which will be delayed an indeterminate amount of time because the information collection requirement implicit in the new power industry frequency coordination process must be approved by the Office of Management and Budget before publication can take place. We will have many additional details on the story in coming weeks, but for now you can read the FCC's own words in a PDF version of the Report & Order.
In addition to amateur radio, the Docket 15-99 proposals included some which will relieve HiFER hobbyists of CODAR interference in a few years, and impacts experimentation below 9 kHz as well. Radio spectrum is now allocated down to 8.3 kHz.
The LOWDOWN This Month In the April 2017 issue of the club publication:
"DX Downstairs" Kevin Carey presents members' LF and VLF loggings.
"On The Air" Experimenters operating on the 160-190kHz and lower bands... and...
"The Top End" MedFER and HiFER beacon lists... and ...
"The LF Notebook" Conducted by John Davis. News from, for and about LWCA members. VLF takes to the skies; March trivia answer; and, is LF good for you?
"Ask Mr Answer Guy" April foolishness from A. Guy, who looks through Lenz's Law and meets his (impedance) match.
"Longwave Trail: AWA Museum" by Kriss Larson. A quick glimpse into a truly fascinating place of interest to longwave fans and all other radio buffs.
In Coming Issues... How a Loop Antenna Doesn't Work...Why You Don't Have An 'E-Field Probe'... and Revisiting the CD4017 as a Beacon Keyer. Interested in subscribing? Click here for address, rates, and remittance information (including PayPal).
New Oexner NDB Handbooks Available
The brand new 2017 editions of Michael Oexner's popular European NDB Handbook & North American NDB Handbook and CDs are now available. The updated ENDBH contains the data of more than 7200 NDBs on 150+ spiral-bound pages in A4 format, and the NANDBH shows the data of more than 5000 NDBs on 130+ pages.
The CD versions of the handbooks contain an updated Google Earth waypoint file so that you can "visit" NDB locations around the globe. New pictures have been added to the NDB picture collection, and the NDB sound clip section has grown as well.
Click or tap this link for a PDF file containing information about the 2017 NDB Handbooks.
LW Resources & Additional Topics
Related Longwave Sites
William Hepburn's DX Information Centre has probably the best online list of aero and marine beacons based on official license information, plus lists of LW broadcasters and time signals, and numerous resources for other types of DXing as well.
The searchable RNA database of LF beacons...not compiled from official sources, but a digest of signal reports from experienced listeners in North and Central America. It's a great tool for identifying those unknown signals. It won't always be up-to-date regarding decommissioned beacons, of course. This might somewhat limit its usefulness in targeting specific beacons to listen for, but it's still helpful if you pay attention to the most recent reported date for a given beacon.
Radio Waves Below 22 kHz Renato Romero's eclectic collection of topics pertaining to both manmade and natural radio signals from near DC to the upper end of audibility. Includes the VLF Open Lab, and articles by many contributors...some fairly orthodox, and some not. Visit: www.vlf.it Not viewable online but a resource which can be ordered there...Michael Oexner's North American and European NDB Handbooks, now updated for 2017 (click link for info in PDF form).
QRSS and WOLF Software
Rik Strobbe's QRSS software (for transmitting extremely slow CW) is usually available from our file library, but while it is temporarily out of service, you can obtain QRSS and Rik's other useful software at the ON7YD download page.
Continuing Development of Argo. Alberto di Bene posts the latest version of Argo, a receiving tool for displaying slow CW, that performs FFT spectral analysis and displays it in ways optimized for QRSS. Many of the transoceanic LF amateur records were set using Argo at the receiving end. Argo has somewhat similar performance to Spectran, but interacts better with the user's soundcard and is customized for QRSS modes.
WOLF. Stewart Nelson devised this unique mode, a variant of BPSK. See his announcement of the MS-DOS version for more details. Now, a GUI-based version by Wolf Büscher continues to increase the mode's popularity. Find the new software at the DL4YHF site.
Spectrum Lab, at that same link, is another of Wolf's creations. In conjunction with your computer's sound card, not only is it an especially advanced spectrum analyzer, but it's also a filtering and sound processing tool, and can serve as the demodulator part of a software defined receiver.
Slow CW for Linux. Claudio Girardi (IN3OTD) has released Slow CW software for users of the Linux operating system, currently v 0.42. The program (called glfer) contains both transmit and receive capability, the latter including an FFT-based spectrum analyzer somewhat similar to those found in popular Windows Slow CW programs.
As with much open-source software in the X-world, you have to compile the C source code yourself. Users will also need additional code libraries. Links to those, plus downloadable source code, can be found at Claudio's glfer page.