Category Archives: Antennas

Backpack Shack 2.0: an update from the field

Finished Backpack Loop 2.0 and accessories assembled together

Many thanks to SWLing Post contributor, TomL, who shares the following update about his homebrew Backpack Shack 2.0 portable loop antenna:


Quick Field update

by TomL

This is just a quick Field Update for my Backpack Shack 2.0 antenna. It is not the most powerful antenna but in the right location it can be useful, especially with using an SDR. It was used during February in two Forest Preserve (County Park) locations outdoors and once from my usual Grocery Store parking lot!

Field Recordings

Please excuse some of the computer generated noises (caused by a slow CPU) as well as some audio connector problems on a couple of recordings.

Each Time is in UTC and Frequency in kHz. Where can you hear unique programming like these samples except Shortwave Radio??? Enjoy!

VOA, @03:00 on 6080 kHz in English from Sao Tome towards Africa (backside of their antenna, opposite of my location)

China Radio Int’l, @23:00 on 9415 kHz in Vietnamese from Beijing (not sure if this traveled around Antarctica to get to me or a backside of their antenna over the North Pole?)

WHR, @15:59 on 9965 kHz in Korean from T8WH Palau

Mighty KBC, @01:48 on 6150 kHz in English from Nauen Germany (announcer sound effects included!)

Voice of Greece, @20:34 on 9420 kHz in Greek from Avlis (unique stylized Greek music, INTERESTING artistic expression)

Vatican Radio, @20:27 on 9660 kHz in English from Vatican City to Africa

WINB, @21:30 on 9610 kHz in English from Red Lion, PA USA (a FUN song about promoting Radio listening!)

And my favorite Government-run authentic folk music station of Mexico, tiny 1KW XEPPM @04:17 on 6185 kHz with clear station ID

I will be working on a larger version of this antenna to transport in my car as well as a small VHF loop antenna for the outside deck for Air/Police/Weather scanning.

Hope to report sometime this Spring.


Thank you so much for the update, Tom! It looks to me like you’re having an amazing time with you homebrew loop in the field! 

As always, keep us in the loop! (Yeah…bad pun, I know!)

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Guest Post: Radios I Have Known #2

Many thanks to SWLing Post contributor, Neil Goldstein, who shares the following guest post which originally appeared on his blog, Fofio:


Radios I Have Known #2 The old, the new, and the Select-A-Tenna

by Neil Goldstein

L-R: Select-A-Tenna, Tivdio V-115, Sony ICF-5500W

After promising this series a year and a half ago, I finally have started digging through the collection, and will start posting about once a week.  The radios, and accessories may not have anything in common (as seen in this post), but were all acquired because they were in some way interesting, or sentimental to me.  Here’s the first three:

Select-A-Tenna
One of the original air-core tunable AM antennas.  You just put this near the radio and peak it for reception.  I was watching for one of these in good shape, and not overpriced, and they have been in and out of production over the years.  This one is from a later production run as can be seen by the extended AM range (1700).  Jay Allen reviewed the S.A.T by comparing the the TERK Air Core antenna not long ago here:  https://radiojayallen.com/select-a-tenna-vs-terk-am-advantage/  The TERK reviewed well, and looks more modern, but I wanted the classic cheesy art-deco looking S.A.T.

Tivdio V-115
I won’t post a long, boring review here.  Many have already reviewed this radio.  All I can say is that if you like small, decent-sounding transistor radios, you will not be disappointed.  If you are expecting top-shelf performance, and perfect ergonomics, then you you may not be happy, but for around $19 you really should be happy with this little gem.  A great little radio at a great price and the most impressive thing here is the sound.  The radio has a small passive radiator like the Meloson M8, and M7, and really surprises me.  It can also be used as an amplified speaker, and has a micro SD slot for using it as a standalone MP3 player.  Grab one!

Sony ICF-5500W
Most transistor radio collectors know this radio.  It’s a classic for sure, but I have to give a little background on why I wanted one.  When I was about 12 years old, I had a few analog SW portables, but nothing with direct frequency readout.  Panasonic had introduced it’s series of direct-readout radios, the RF-2200, 2800, and 4800, and Sony was competing with the ICF-5900W.  Dad acknowledged the quality and technology of these radios, and told me that if I saved most of the money by working for him, he may help me get one.  The 2800, and 4800 were way out of reach, but one Sunday in the local paper, a department store in Kingston (Britt’s, which was Newberry’s answer to Macy’s) had the 2200 advertised for $138.88.  I had been flip-flopping between the Sony and the Panasonic for weeks, but that was the clincher.

The radio is still in use.  My sister in law has it.  I had given it to my late brother Paul at some point and she still uses it as her main radio.

Why this Sony though?  I still want a 5900W.  When I saw this one come up at an auction, I recognized the shape it was in.  The ICF-5500W was the companion radio to the 5900W.  AM/FM and VHF Hi (with a basic, but functional squelch control).  The 5500 and 5900 are a monument to Sony design at the time.  The pop-up antenna (which still works flawlessly), The separate Bass, Treble, and Loudness controls, The overall quality of sound and function, all of this is an example of what Sony was producing at the time.  I think their modern small electronics are a shadow of what they were capable of years ago.  This thing still sounds great and performs well next to my modern DSP radios.  I still would love to get a pristine 5900W but they usually fetch premium dollars.  Maybe someday.

Bravo Sony, but where did you go?

More to come!!


Thanks for sharing, Neil!  I, too, have the Tivdio V-115 and the Sony ICF-5900W.

The ‘5900W is a gem of a solid state receiver. It has brilliant AM broadcast band reception and rich audio. I need to open my ‘5900W and clean all of the contacts since some of the sliders are scratchy. It’ll make for a nice rainy day project!

We look forward to your next installment! Post Readers: be sure to check out Neil’s blog, Fofio!

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The Lazy Susan: Mario’s mediumwave companion

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), who writes:

Grundig AN-200 Loop Antenna and Lzy SusanHere is a handy tip for those using small magnetic loops, like the Grundig AN-200. Using a simple Lazy Susan makes rotating the loop a lot easier as in the picture attached. It gives you a very smooth 360 degree rotation using a simple flip of a finger. Lazy Susans come in all sizes and luckily I had one already which fits the AN-200 perfectly.

This is a handy tip, indeed! In fact, I once spoke with a mediumwave DXer who told me that when he prepares for a DXpedition, he packs the Lazy Susan before he packs his portable’s batteries!

Lazy Susans are quite easy to find. Most “big box” retailers have them, Amazon.com has a massive inventory (affiliate link), IKEA and I’ve had incredible luck finding them at thrift stores for next to nothing! In fact, if you have a local thrift store with a large selection of kitchen accessories, you’ll likely find a Lazy Susan or two on the shelves.

Thank you for the tip, Mario!

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WBCQ builds 500 kW transmitting station

Here at the Winter SWL Fest, there has been much chatter about the new Ampegon rotatable antenna and transmitter system at WBCQ.

WBCQ made the following press releasee yesterday:

(Source: WBCQ)

For Immediate Release: March 2, 2018

WBCQ The Planet Announces New Showcase Radio Facility

Plymouth Meeting, PA:

WBCQ The Planet announced today that it is building one of the most powerful and versatile radio stations in the world. WBCQ’s new shortwave radio station, now under construction in Monticello, Maine, features a new 500-kilowatt transmitter from Continental Electronics and a state-of-the-art antenna system from Ampegon Antenna of Switzerland.

The new station, funded by private investors, will be able to direct a powerful shortwave signal to any country on Earth. Our new facility is planned to be a showcase for the radio world and is dedicated to our free speech mission.

The new station is planned to commence operations in fall 2018.

Obviously, the investor has deep pockets and I understand is affiliated with a religious organization. The new antenna and transmitter building is being built on land adjacent to the existing transmitter site.  WBCQ actually broke ground last summer and the massive antenna’s foundation is already in place. The antenna is on site now, but has not been assembled. Most of the construction is on hold during the winter, but WBCQ plans to have this 500 kW station on the air by Fall 2018.

Follow developments by bookmarking the tag: WBCQ

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The XHDATA D-808 and longwave: how to build an effective antenna

Many thanks to SWLing Post contributor, Mad Radio DXer, who writes:

I said I would share my results for attempting to receive LW signals on the XHDATA D-808, & if I can use a longwire to improve reception on this radio. This was after posting videos when I used around 50 metres of longwire connected to the D-808 for improved Medium Wave reception & to prove it works.

This first video shows that it is not possible for LW, no matter if I connect the 50 metres longwire to the 3.5mm input or the whip antenna. I also compare reception of the same station with the Degen DE1103 PLL using the 3.5mm input. The Degen DE1103 still had better reception even when I used the whip antenna extended at the very minimum when using the LW/MW external antenna trick. I know I should have used the internal ferrite antenna of the Degen compared to the D-808, but in any case I did try off camera & reception was about the same. So unfortunately the D-808 was never going to win this round.

However, there is a solution.

The answer? Build yourself a Long Wave induction antenna as shown in the second video [below]. I made one some time ago, as I grew frustrated at how poor the Tecsun radios were on this part of the band & that there were no LW induction antennas available to buy. I tried a signal on 207 kHz which is RÚV Rás 2 from Iceland. Either a radio with a very good internal antenna or a good external antenna is needed to receive this station at my QTH in southern England.

Placing the D-808 on the induction antenna resulted in a very pleasing result, which was it did get reception of Iceland on 207 kHz. So this shows that it is possible to DX on the LW bands with the D-808 with some “external help”.

For anyone interested making a LW induction antenna as shown above, here is a link to a video that has basic instructions & further results. It may be a very simple build & finish what I did, but for me the most important thing is that it works.

I hope my comments & videos will be a great help to all. Happy DXing.

Regards,

Mad Radio DXer.

Excellent–your comments and videos are most welcome! There are quite a number of SWLing Post readers who are avid longwave DXers. I love the simplicity and efficacy of your longwave antenna–something anyone could build.  A clever upgrade to the affordable D-808. Thank you for sharing!

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External Ferrite Antenna by playloudfm

Posted by SWLing Post contributor Troy Riedel:

I just noticed something on eBay.  Seller “playloudfm” based in Greece (100% feedback rating), the first to offer the high gain external ferrite antenna for the Tecsun PL-360/PL-365/County Comm GP5, has a new offering:

From the seller’s listing:

– Frequency: 530Khz – 1710Khz
– Tunable
– Passive, No external power or battery needed
– Wireless connection to AM Radios
– Plus a low impedance output 3.5mm mono plug for 50 ohm scanners
– Improves Sensitivity and Performance of your AM Radio Receiver for AM Band Dxing!
– Very small and lightweight, perfect for traveling antenna

This AM antenna can be used in two different ways
1) you can simply attach it near your AM radio internal ferrite antenna – wireless connection
2) use a 3.5mm cable to get a low impedance output for use with 50 ohm scanners

Use tuning knob to get the maximum signal

RFA200

 

Have any Post readers bought and used this?

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Frank recommends the MFJ-1886 magnetic loop antenna

Many thanks to SWLing Post contributor, Frank M. Howell, who left the following comment on our indoor antenna post yesterday:

You omitted the MFJ Receive Loop….it outperforms my Wellbrook ALS-1530+. Very competitive price point!

See http://www.mfjenterprises.com/Product.php?productid=MFJ-1886.

Thanks for pointing this out, Frank.  You’re right in that I had forgotten about the MFJ receive only loop antenna. It’s a fairly new product in their (massive!) catalog of radio products.

I’m very curious if any other SWLing Post readers have experience with the MFJ-1886 antenna.  I’d love a review.

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