Radio Deal: Talking House AM transmitters $25 each

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), who shares a find in the QRZ.com online swapmeet: Talking House Broadcasters.

If you’re not aware, Talking House Broadcasters are AM transmitters that were designed to be used by real estate agents so that potential customers could drive by a house on the market, tune their car’s AM radio to a specific frequency, and listen to a pre-recorded message.

I’ve also been to ARRL Field Day sites where a Talking House Broadcaster was used to relay information about the Field Day activities to visitors.

Of course, I would use one of these to broadcast my own music and Internet radio streams throughout my house. If I didn’t already have an SSTRAN AMT3000, I would snap one of these up in a heartbeat!

The AM output power is FCC Part 15 compliant, but with a good antenna/ground, you might be surprised at the signal’s footprint!

The seller currently has three working units he’s priced at $25/each or $50 for all three.  Even as used units, this is a fantastic deal!

Click here to check out the ad on QRZ.com.

Assume if the link above is broken or missing, the items are all sold. Thanks again for the tip, Mario!

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Alex updates shortwave frequency charts for 2020 summer season

Many thanks to SWLing Post reader, Alex, who has just informed me that he’s updated his printer-friendly shortwave frequency charts for the summer broadcasting season.

Note that Alex creates his charts based on listening to broadcasters rather than importing schedules from other sources.

You can download the free charts on his website:
Shortwavetimes.com

Many thanks for sharing these, Alex!

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Archivist seeks copy of “A Brief Statement of Shortwave Programs to Target Areas”

Many thanks to UNT Archivist, Maristella Feustle, who writes with the following inquiry :

I’m in search of some historical literature cited in a 1970 dissertation.

Might anyone have access to a copy of the OWI’s “A Brief Statement of Shortwave Programs to Target Areas,” dated November 1, 1942? Thanks!

Post readers: If you happen to have a copy of this document or know its location, could you please comment with details? Many thanks!

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Wellbrook power supply source?

Wellbrook Mag Loop antenna at Mark Fahey’s QTH near Sydney, Australia.

Many thanks to SWLing Post contributor, David Goren, who writes:

I need a new power supply for one of my Wellbrook loop antennas.

Do you know of good source for reliable ones? I forgot where I obtained the last replacement which worked fine until the wire attaching to the plug worked loose.

Here are the specs:

Plug in Class 2 Transformer
Model: DC1200300R
Input: 120VAC 60 Hz 9W
Output: 12V DC 300mA
manufacturer: Sandin Ltd.

Searching online delivers a mixed bag of somebody’s old power supply.

Post Readers: Any suggestions for David? I’m sure he’s particularly interested in a good quality power supply–one that’s quiet and would last a few years. Please comment and include links when possible!

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Radio Waves: AM/FM in Teslas, Odd Crosleys, CW Club Membership on the Rise, and 2020 Contest University is Free

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Kim Elliott, Dave Anderson, and Paul Evans for the following tips:


“Infotainment Systems” In Cars Portend Safety, Privacy, And Competition Issues (Forbes)

Almost all new cars include so-called “infotainment systems,” which provide navigation and various sources for music and news. Most companies have begun to outsource these systems to the Silicon Valley mainstays such as Apple, Amazon, and Google. The electric car manufacturer Tesla, however, has developed its own infotainment system that is far more integrated with the car itself.

Tesla recently announced an “upgrade,” which would allow users to watch Netflix, Hulu, and YouTube (when the car is parked). This innovation has a flip side: it removes AM / FM radio capabilities. Tesla and other electric car manufacturers claim they have removed AM radio in many of their models due to concerns over interference. But Tesla’s announcement is peculiar because electric engines do not interfere with FM radio reception.

Former FEMA director Brock Long worries that Tesla’s decision could prevent the government from transmitting crucial information in emergencies. Long’s concerns are valid, particularly in a crisis like the ongoing pandemic, when broad communication with the public is necessary to protect national security. AM/FM radio reach places that television and broadband do not, and that is why the government has invested tens of millions of dollars to ensure radio stations can remain on the air during periods of widespread threat to the public – including the current one. As the coronavirus reminds us, our nation still has public safety needs that no amount of technical wizardry can obviate.

The public safety concerns are real, but Tesla decision to remove AM/FM radio also raise the perennial tech issues of privacy and competition.

Tesla has contracts with tech companies such as Spotify and Pandora, many of which are pay services. These tech companies are no doubt pleased that Tesla is contemplating taking out AM/FM radio, which is still the most listened to audio platform—and constitutes meaningful competition. However, these conflicting interests creates mismatched incentives for Tesla.

Because Tesla’s market share is small, and the upgrade is optional, this conduct likely does not rise to anything close to an antitrust violation. However, the vertically integrated model which Tesla is following raises the same type of concerns as when Big Tech firms pick and choose what apps and services customers can favor. If Google, Apple, and Amazon, which have their own podcast and streaming audio services, begin to demand that auto manufacturers carry their services exclusively, then more serious competition problems will arise.[]

Odd Crosley Radios from the 1920s (Hackaday)

You may sometimes see the Crosley name today on cheap record players, but from what we can tell that company isn’t connected with the Crosley Radio company that was a powerhouse in the field from 1921 to 1956. [Uniservo] looks at two of the very early entries from Crosley: the model VIII and the XJ. You can see the video of both radios, below.

The company started by making car parts but grew rapidly and entered the radio business very successfully in 1921. We can only imagine what a non-technical person thought of these radios with all the knobs and switches, for some it must have been very intimidating.

The model VIII had two large knobs, three small knobs, and a switch. Oddly enough there were very few markings on the knobs, as you were expected to know how to use a tuned RF radio. The large knobs were for tuning capacitors and the switch was for coil taps, while the three small knobs controlled the tube filament supplies.[]

Increase in CW Club membership (G4BKI.com)

The rate at which amateurs are joining CW clubs has gone through the roof with ‘lockdown’.

The fastest growing club (SKCC) has tripled its daily new members rate and is now increasing by 14-15 per day. Information and files can be found at: http://www.g4bki.com/club_call_history.htm

Contest University 2020 will be held online free via Zoom (Contest University)

Contest University 2020 will be held online free via Zoom (Link will be available on May 7th)

Thursday, May 14th 9:00 am EDT

CTU 2020 outline is available on the 2020 Course Outline Page

Click here to read more information.


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Panasonic RF-2200 antenna coupler (model RD-9820) on eBay

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), who recently discovered a model RD-9820 antenna coupler for the Panasonic RF-2200. Mario states, “[The] price is reasonable and they take offers.”

Please, someone purchase this before I do in a moment of weakness. I’ve two RF-2200s, but do not have the matching coupler. It is incredibly temping even though I know I’d rarely use it!

Click here to view on eBay (this partner link can support the SWLing Post)

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FCC comment period on RF exposure limits

Many thanks to SWLing Post contributor, Paul Evans, who writes:

Readers will recall that the FCC formulated new RF Exposure rules in November 2019. They were released for the Federal Register in early December. There was to be a comment period of 30 days followed by a 30 day reply from the FCC.

Nothing was published until April 1, 2020, when the Federal Register published a FINAL rule on *part* of the original proposals. There was no comment period!

On April 6, 2020 the Federal Register published the rest of the document, but this time with “Comments are due on or before May 6, 2020, and reply comments are due on or before May 21, 2020.”

This too was incorrect and was changed to “Comments are due on or before May 15, 2020, and reply comments are due on or before June 15, 2020.”

https://www.federalregister.gov/documents/2020/04/15/2020-07866/human-exposure-to-radiofrequency-electromagnetic-fields-correction

Somebody clearly forgot how to count. Most importantly, these documents should be examined in detail. They should be checked for discrepancies and ‘failures in method’ of their new methods of measurement, testing and realisation. They ignore all the other existing worldwide standards, stating that they need a simpler set of standards in the USA. In the process a clear set of standards (int’l and EU) are muddied and require an entire new suite of tools in order to legally produce RF!

Don’t assume the ARRL will deal with things and that ‘they will be alright’. Time is running out to comment.

Thank you for the heads-up, Paul!

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