Monthly Archives: July 2017

Video: TX Factor Episode 17

Radio Erena: “a symbolic lifeline” to Eritrea

[Radio Erena founder, Biniam Simon, writes:] “You have to understand: Eritrea is completely closed. No information is available there at all, about the outside world or what is going on internally. So if you’re an Eritrean journalist, and you make it to a place where so much information is available, the first thing you think is: why not tell people all this? It was the obvious thing to do.”

[…]The station broadcasts a two-hour programme in Arabic and Tigrinya seven days a week, repeating it several times a day, giving listeners inside Eritrea multiple opportunities to listen (they may do so, in the privacy of their own homes with the shutters closed and the sound turned down, only when electricity is available – which it often isn’t). As well as news about what the regime may be up to, it provides a detailed picture of what is happening to the refugees who are travelling to Europe – when a boat carrying 360 Eritreans capsized off Lampedusa in 2013, a correspondent was immediately dispatched to Italy – as well as features about diaspora success stories, footballers and athletes among them.

It runs smoothly. There is always a lot to tell. Making sure it can be picked up in Eritrea, however, remains a constant struggle. In 2012, the government managed to block it – seemingly unbothered by the fact that in doing so, it also blocked its own television channel (both broadcast on one satellite frequency). It has also successfully jammed it on shortwave, and on at least one occasion has hacked into the Radio Erena website, destroying it completely. “It’s a nonstop challenge,” he says. “We’re constantly fighting them, and it’s getting harder and harder because they are now employing new experts from China and Indonesia.”

But if this is exhausting, it’s also hugely encouraging: “It means that what we’re doing is working. We know this because the government wants us to stop.”[…]

Readers: this is only an excerpt from this excellent article in The Guardian. Click here to read the full article.

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FCC: Expanded use of marine HF frequencies on land

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Many thanks to an SWLing Post contributor who shares a link to the following public notice from the FCC:

Wireless telecommunications bureau seeks comment on request by Shipcom, LLC, and Global HF net, LLC, to allow use of high seas marine frequencies by first responders and federal agencies during disasters

Section 80.123 of the Commission’s rules permits very high frequency public coast stations to provide service to units on land under certain conditions, but does not allow high frequency (HF) public coast stations to provide such service. In 2010, the Wireless Telecommunications Bureau’s Mobility Division (Division) granted Shipcom, LLC (Shipcom), a waiver of section 80.123 to permit the use of HF public coast frequencies by first responders during catastrophic situations when normal communications systems are not available. The Division concluded that this limited use of HF maritime spectrum would enhance public safety during catastrophes. The waiver permits service to land-based (base and mobile) Public Safety stations on HF frequencies in the event of a natural or man-made disaster that renders the normal communications infrastructure inoperable, and monthly testing/training to familiarize personnel with how to operate the equipment and make sure it is operable.

Click here to download the full FCC Public notice (PDF).

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HAARP Open House: August 19, 2017

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Many thanks to Chris Fallen (KL3WX), Assistant research professor in the University of Alaska Fairbanks Geophysical – Space Physics group , who shares the following information about the upcoming HAARP Open House:

HAARP Open House 19 August, September campaign

The next HAARP open house will occur on 19 August 2017 and include round-trip bus transportation from Fairbanks for $45 which will help bring costs down for individuals, particularly for those from out of town.

(Flyer attached, though I am not aware of an official press release yet but updates will be posted at http://www.gi.alaska.edu/haarp)

Throughout the day there will be talks by Geophysical Institute researchers on-site about the HAARP facility and research, and other research topics pursued at the UAF Geophysical Institute. As in the previous year, tours of the main transmitter array, control center, and power generation plant will be offered throughout the day. Hams and radio enthusiasts are encouraged to bring their equipment for photo opportunities or even to make contacts from the site.

Any SWLing Post readers/contributors plan to attend the open house? If so, we’d love to share your photos! Please contact me if interested!

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A very clever radio go-box using the Gator GR6S shallow rack case

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(Source: Southgate ARC)

Young radio amateurs Zechariah WX4TVJ, Faith Hannah AE4FH, Hope KM4IPF and Grace KM4TXT have released a video about their Go Box

Many people have asked us to make a detailed video about our Go Box, so we decided to make one. We show you what is in the Go Box and how we installed all of the equipment. There is also some funny stuff in the video, too!

The case we used was a Gator 6 rack unit shallow case:
https://www.bhphotovideo.com/c/product/252763-REG/Gator_Cases_GR_6S_GR6S_Shallow_Rack_Case.html

The shelves are simply vented rack mount shelves. Here is a link to where you can get them:
https://www.sweetwater.com/store/detail/RkShelfU1

Watch A Close Look at Our Ham Radio Go Box and How We Put it Together:

Click here to view on YouTube.

Lea Family
http://hamradio.world/

These girls do an amazing job with the video–bravo!

I love this setup. While I typically pack very lightly for portable radio work, building a system like this makes for very quick deployment when you require a full 100 watt system with multiple radios and multiple accessories. Radio clubs could easily put systems like this together for events like Field Day or Emergency Comms. It’s grab-and-go at its best!

Of course, a field DXpedition/SWLing station could also be easily built into this portable system. In fact, I bet an SDR with computer, keyboard, and monitor could be mounted and accommodated in this space.

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WWV seeking reception reports of 25 MHz broadcast

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WWV’s transmitter building in Fort Collins, Colorado (2014)

(Source: WWV)

Current 25 MHz Broadcast Specifications

As of 2042 UTC 7 July 2017 the 25 MHz broadcast is now on a turnstile antenna with circular polarization and will remain in this configuration until after the solar eclipse on 21 Aug 2017. Signal reports are requested.

Schedule: typically continuous. As an experimental broadcast, the 25 MHz signal may be interrupted or suspended without notice.

Radiated Power: 2.0 kW

Antenna: Experimental Turnstile

Listener comments and reception reports may be emailed to: [email protected] (link sends e-mail), or sent via postal mail to:

National Institute of Standards and Technology
Radio Station WWV
2000 E. County Rd. 58
Fort Collins, CO 80524

Note that the 25 MHz signal has traditionally used a vertically-polarized antenna and for about one year (between 2014-2015) with a discone antenna.

Please share your report with WWV–contact info above!

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The Digitech AR-1780: a new SSB shortwave portable

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[UPDATE: Click here to read our full review of the Digitech AR-1780.]

Many thanks to SWLing Post contributor, Cap Tux, who writes:

This radio seems to have recently been released in Oz, no idea of its performance on SSB et al. but seems to do everything the C.Crane Skywave does. Heavy on batteries though at 4 x AA and nearly twice as heavy with similar dimensions to the Skywave, not major if it performs well and has good battery life.

Apparently the AR-1780 uses the SiLabs DSP chipset going by comments on Radio Reference. Also has RDS, Temp, the keypad layout looks similar to a Eton G3.

Taken from Jaycar’s website site:

This is a very compact world band radio, covering the most popular frequencies. It features rapid digital tuning, 1000 memory presets, and an easy to read display. Single Sideband Modulation (SSB) is used to listen in on 27MHz CB radio, short wave amateur radio and morse code. The large internal speaker provides clear audio, and you can connect your favourite set of headphones for personal listening. Powerful enough to receive what you want, and compact enough to take wherever you want.

Features:
– FM/MW/SW/LW/AIR Bands
– Single Side Band (SSB)
– Telescopic Antenna
– 3.5mm socket for external antenna
– Selectable Bandwidth: 1 – 6kHz

Specifications:
Radio Bands:
FM 87.5 – 108MHz
MW 522 – 1620kHz / 520 – 1710 kHz
SW 1711 – 29,999kHz
LW 150 – 450kHz
AIR 118 – 137kHz
Batteries: 4 x AA (not included)
Weight: 253g (Excluding Batteries)
Dimensions: 150(W) x 95(H) x 30(D)mm

Many thanks for the tip, Cap!

This looks like a full-featured portable. As mentioned, it certainly resembles the Grundig G3 in many respects.

If the AR-1780 performs well, it’ll be a very welcome addition to the Australia and New Zealand markets.

Please contact me if you’ve purchased the AR-1780 and would like to write a guest post/review. I’m very curious how well this portable stacks up against other portables especially in terms of overall sensitivity/selectivity and noise floor.

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