/r/shortwave

Photograph via snooOG

A community dedicated to shortwave radio broadcasters, experimenters, and listeners.

A community dedicated to shortwave radio broadcasters, experimenters, and listeners.

Other bands of radio are allowed to, but this is primarily a shortwave subreddit. Always and forever.

English broadcast guides:

Shortwave resources:

/r/shortwave

24,379 Subscribers

3

About antennas for portable radios

I clarify that this is my experience with the tests I did. I just want to tell the result I had. I can not guarantee that it will work in other radios or situation. And sorry if my English is not clear.

I have read a lot in the last few days about shortwave antennas for small and portable radios (Tecsun, XHDATA, etc), and as there are several options, each one has its pros and cons.

It seems that the best one is the simplest and cheapest: a simple long wire or cable. For me, a 1mm audio cable about 30 meters (Sorry americans, but I only speak in meters, cm, mm) long works quite well and I live in an area with a lot of business and commercial activities.

But from everything I read, there was one thing that caught my attention: grounding.

Looking for more information on how to ground my D-808 I found something that said that I should just add a ground wire and connect it to the slave-ground of the 3.5mm plug, another option was to connect a wire to the negative pole of the internal battery, but I didn't want to risk so much. I'm not sure if the ground has a connection to the electronics of the radio.

Now, the result is that now I have less noise in many frequencies and I listen to new stations that the radio didn't even detect before (example the Spanish radio in my previous post).

My next test will be with a MLA-30+, to which I will also make some changes, especially in relation to the USB power supply and noise.

I'm new to SWL, I'm curious and I just want to share what I try because a lot of the information about antennas on the web is confusing for many people.

The image is basically what I did and I'm satisfied with the results (for now). If I did something wrong or not right, please tell me

1 Comment
2024/11/03
02:02 UTC

6

Why does Medium Wave use an internal antenna, while Short Wave uses the same extending antenna that FM uses on many Shortwave radios?

Why does Medium Wave use an internal antenna, while Short Wave uses the same extending antenna that FM uses on many Shortwave radios?

1 Comment
2024/11/03
01:35 UTC

3

Best portable SW radio for receiving CW?

I’ve been listening to a lot more CW on the go on my phone using WebSDR, but I’d love to extend a whip and listen on a portable short wave radio. Anybody have any recommendations for their favorite SW radio that does a great job with CW? Thanks in advance for your reply!

3 Comments
2024/11/03
01:18 UTC

3

Radio Exterior de España 17715 kHz

Signal received in Asunción, Paraguay.

They report about #DANA and talk about 214 dead, but according to many people in Spain, there are much more dead.

0 Comments
2024/11/02
23:08 UTC

9

Having a ball with the New PhantomSDR+ in North America (Lumpkin County, GA, USA)

2 Comments
2024/11/02
23:04 UTC

2

Tecsun PL-606 poor timekeeping

Anyone know of a way to calibrate the clock crystal on the PL-606? My unit seems to have really ghastly timekeeping for a quartz clock, it surely must be capable of better with the right adjustment.

1 Comment
2024/11/02
18:59 UTC

3

Tecsun PL-990X

I have Tecsun PL-310et for a few years. I am using it inside the apartment. FM works perfectly but I was always curious about SW. I can scan up to 40 SW stations (depends on hour). I tried using AN48-X, signal looks stronger on display but it's not really giving me more stations or better quality.

Should I expect much more cool stuff with 990X?

Is this SW world still alive or it's wasteland now?

PS. I am in Poland

21 Comments
2024/11/02
17:59 UTC

2

Some good openings towards the far east in southern Ontario on 19 meters this morning

1 Comment
2024/11/02
14:09 UTC

7

What radio stations can I listen to on a National Panasonic R440 4-Band, 8-Transistor

This radio has frequency range of MW: 525-1605 KC, A range of SW1: 1.6-4.5MC A range of SW2: 4.5-12MC A range of SW3: 12-26.1MC This does still work but I can only hear static(I am in Australia) and I do know in Australia shortwave was shutoff sometime in the 90’s but apparently(according to my dad) just one 1KW shortwave signal tower could reach all the way to England

9 Comments
2024/11/02
12:27 UTC

11

CHU time signal on 14670 kHz, 0600 UTC on Nov. 2

📻 RSPdx and MLA-30+ fitted with a four-metre loop, used indoors, in Calgary, Alberta, Canada.

2 Comments
2024/11/02
06:24 UTC

8

WREM: The Station of Your Dreams

2 Comments
2024/11/01
19:54 UTC

7

Radio Nikkei 1 3925 KHz

Radio Nikkei 1 3925 KHz at 11:10 UTC, Japanese language service from Nemuro, Japan listed as 10 kW. Received in the Pacific Northwest, USA using a AirSpy HF+ Discovery a 20 meter length end fed random wire antenna.

For comparison, here is the same station received on the Seiki Century-21. The AGC is much too fast acting on the Century-21. I may look into slowing it down a bit.

Radio Nikkei 1 on the Century-21

0 Comments
2024/11/01
11:38 UTC

31

Recent loggings on shortwave and internet radio..happy DXing people '-)

3 Comments
2024/11/01
04:12 UTC

21

🏴‍☠️ XFM on 6935 kHz USB, ~0139 UTC on Nov. 1

They’ve been taking calls and playing musical requests on this an other frequencies. Sounds like they’re about to shut down for the night.

📻 RSPdx and MLA-30+ fitted with a four-metre loop, used indoors, in Calgary, Alberta. Canada.

6 Comments
2024/11/01
02:22 UTC

29

Century-21 Shortwave Receiver

WRMI 9395 KHz at 00:40 UTC 1 NOV 2024. Received in the Pacific Northwest, USA. Receiver is a 1977 Century-21, built in Japan by Seiki Electronics. Antenna is a 20 meter length end fed random wire.

The Century-21 is almost identical to the Drake SSR-1, Standard C6500, and Lowe SRX-30. All were manufactured by Seiki. I also own the Drake SSR-1, but find the Century-21 to be slightly better. The Century-21 has an RF Gain control whereas the SSR-1 has a 2-step attenuator. The RF Gain is more effective.

The Century-21 was exclusively sold in Europe and every example I have seen is wired for 220 VAC. Mine is unusual in that it is wired for 110 VAC. In addition to AC Mains, the receiver runs off of 8 internal D Cell batteries, or 12 VDC.

These receivers are of the Barlow-Wadley PLL design and take some getting used to to tune properly. There is a MHz dial, 0 - 29 MHz, a KHz dial, 000 - 1000 KHz, a 4-position Band selector, and a Preselector". The receiver is double conversion and because of the tuned front end, images and overload from local broadcasters is non-existent. These receivers are not really high end, but they are very usable and work well for DX. The performance on the AM Broadcast Band is especially good.

Century-21

11 Comments
2024/11/01
01:48 UTC

34

A Ghostly Signal

12 Comments
2024/10/31
15:19 UTC

5

NHK World Japan, 15195 & 17810 kHz, ~0420 UTC on Oct. 31, 2024

📻 Qodosen DX-286 with a random wire 11 metres long clipped to the telescopic whip, listening indoors in Calgary, Alberta, Canada.

1 Comment
2024/10/31
04:33 UTC

5

Sound of Hope 21490 KHz

SOH Xi Wang Zhi Sheng 21490 KHz in Chinese from Miaola, Taiwan at 16:12 UTC 30 OCT 2024. Received in the Pacific Northwest, USA with AirSpy HF+ Discovery and 20 meters length end fed random wire antenna. Some sources list this transmission at 0.1 kW, but it's more likely 1 kW. It's quite weak though.

0 Comments
2024/10/30
23:38 UTC

57

Brazilian MilSat Pirates

Not Shortwave but definitely an oddity. Brazilian MilSat Pirates on 253.850 MHz FM (UHF Military Band). From the past 19 SEP 2015 at 16:32 UTC from the Pacific Northwest, USA. Receiver is an AOR-3000A using a discone antenna and a 15 dB preamplifier.

While communications using the US's Fleetsatcom Network of satellites was being migrated to a newer system, the older satellites were still operable. The Brazilian Pirates took full advantage of the unused satellites. These guys are in the Amazon and are most likely Truckers delivering supplies to remote villages. A lot of these villages were similar to the 1890's "Gold Rush" towns in the US. Built in a hurry to take advantage of the resources that the Amazon Basin had to offer.

Most Truck Stops were able to modify commercial amateur radio FM 2 meter transceivers to operate on the MilSat frequencies so there was no shortage of radios. Since there were no cell phone networks in this area, the pirated MilSats were perfect for their use. Several times US Agents and Brazilian Police raided the Pirates, especially those residences that sported UHF antenna on their roofs!

13 Comments
2024/10/30
21:20 UTC

3

Best External Antenna Retekess TR110

I just bought a Retekess TR110. I'm a newbie and not an expert. I want to buy a good portable external antenna that directly connects to the port. I know there are antennas with crocodile clip attachments, but that's not what I want. Any suggestions? I'm based in the UK.

11 Comments
2024/10/30
14:48 UTC

25

Indonesian "Horse Races"

6965 KHz LSB at 11:30 UTC on 30 OCT 2024. Received in the Pacific Northwest, USA with an AirSpy HF+ Discovery and 20 meters length end fed random wire antenna.

Now here's something you might not hear very often. These are Indonesian Radio Pirates that engage in unlicensed communication just below the 40 meter amateur radio band. They operate on multiples of 5 or 10 KHz, 6965, 6975, 6985, or 6970, 6980, KHz etc. I can hear them most Fall mornings from 04:00 - 07:00 Pacific Daylight Time. These gentlemen can be carrying on a conversation amongst themselves, and then break out into a chant. The chanting is known as Horse Racing and the winner is the operator that chants the longest and the loudest! Hope you all enjoy this radio oddity.

13 Comments
2024/10/30
13:55 UTC

69

Any idea what this is?

Past few days I went to the beach and I caught this weird signal on 28666khz sounds like something military or I don't know. They mostly says letter numbers and thank you haha.

Just curious

Newby from South America here, thanks in advance!

29 Comments
2024/10/30
03:09 UTC

8

“Radio Ace” on WRMI 9395 kHz, ~0242 UTC on Oct. 30, 2024

Audio is from near the start of “The Hitchhiker’s Guide to the Galaxy” by Douglas Adams, when Ford Prefect and Arthur Dent are about to get thrown off the Vogon construction ship where they were hiding. / 📻 RSPdx and MLA-30+ fitted with a four-metre loop, used indoors, in Calgary, Alberta, Canada.

0 Comments
2024/10/30
02:51 UTC

31

A Beacon I’m Guessing. 61Khz

9 Comments
2024/10/29
17:33 UTC

3

JRC Radio Dabanga 1 KW

JRC Radio Dabanga program in Dari language from Issoudun, France on 17555 KHz at 16:25 UTC 29 OCT 2024. 1 KW received in the Pacific Northwest, USA using AirSpy HF+ Discovery with a 20 meter length end fed random wire antenna.

9 Comments
2024/10/29
16:58 UTC

27

Pass Band Shift for the win! 9665 kHz Radio China International, Pashto language.

6 Comments
2024/10/29
15:53 UTC

5

VMC Charleville, Queensland 1 kW

VMC Charleville, Queensland Australia on 8176 KHz at 12:09 UTC, 29 OCT 2024 with 1 kW. This is best listened to with headphones, where you can hear some of the frequencies announced. Received in the Pacific Northwest, USA using AirSpy HF+ Discovery with a 20 meter length end fed random wire antenna.

3 Comments
2024/10/29
13:51 UTC

20

Trenton Military?

Coming from what location? UTC 12:50

8 Comments
2024/10/29
12:51 UTC

4

GRUNDIG Satellit Q

I have a few. My fave is 6001 for the audio quality and insane number of controls -- I was was attracted to complexity in various apparatae at the tender age.

Which one is yours?

2 Comments
2024/10/29
09:15 UTC

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