Tag Archives: PL-310ET

Babcock Test Transmission on the Tecsun PL-310ET

Many thanks to SWLing Post reader “J JA” who shares the following video/recording of a Babcock test transmission on 11,815 kHz with his Tecsun PL-310ET:

Click here to watch on YouTube.

Dave notes unfavorable reviews of the Tecsun PL-310ET

Many thanks to SWLing Post contributor, Dave Zantow, who writes:

I see the Tecsun PL-310(ET) has been receiving some very negative reviews over on eHam in the last days. Too bad:

http://www.eham.net/reviews/detail/10283

Thanks for the heads-up, Dave!

Perhaps these reviewers simply received faulty/lemon units? Internal soldering and construction can vary. On the other hand, both reviews were submitted on Feb 1, 2017 implying their units probably came from the same production batch. There are a couple of recent negative reviews on Amazon.com as well (though not detailed).

Of course, it does make one wonder if Tecsun made any internal design changes to the PL-310ET. But again, perhaps these two reviewers simply received units from a faulty batch.

For sure, these reviews are not consistent with the excellent performance of the PL-310ET I know–which is, by any standard, an amazing little radio!

I don’t want to imply there’s something wrong with the current PL-310ET production run, but I am curious if anyone else has been disappointed with their recently-purchased PL-310ET. Comments?

[UPDATE: based on the many comments–thank you!–it appears at least PL-310ETs that were purchased up to the end of December 2016 are functioning perfectly. Again, perhaps these two reviewers received faulty units.]

The brilliant little Tecsun PL-310ET: serious DXing on a budget – part 2

Hi there, here is part two of my original post containing various reception videos for the amazing Tecsun PL-310ET pocket shortwave receiver. I continue to be amazed at the sensitivity and selectivity of this rather modest and diminutive receiver, particularly at it’s price-point of around £40 in the UK and less elsewhere! Here is the second half of the reception videos, with some nice signals from Brazil, Guinea, Ethiopia, Swaziland and India. You might notice that some of these catches involve the use of a 240 metre (approx.) length of barbed wire fence! I’m not sure how beneficial the electrical properties of the fence were, probably somewhere between not great and not good lol, but some pretty decent DX was had with the PL-310ET attached to it via the external antenna socket and a crocodile clip!

The barbed wire fence extends almost to the treeline on the horizon; about 240 metres

I hope you enjoy this set of reception videos, they certainly help to demonstrate the great performance of the PL-310ET and in addition of course, it’s ability to handle large antennas quite well. Embedded videos and text links follow below. Lastly, there are now approaching 1,200 reception videos on my YouTube channel Oxford Shortwave Log and I would like to take this additional opportunity to thank everyone for their support, friendship and advice.  In the meantime, I wish you all a very Merry Christmas, a Happy New Year and excellent DX!



Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.

 

 

The brilliant little Tecsun PL-310ET: serious DXing on a budget – part 1

tecsun-pl-310etHi there, a good friend of mine Mr Thomas Brogan mentioned to me recently that his little Tecsun PL-310ET was proving to be an excellent receiver and that it would suit my DXpedition activities. Now, as someone who likes to push the envelope of performance with sophisticated portables, usually coupled to very large antennas, a cheap little Tecsun might not have been an abvious choice for my next purchase. However, Mr Brogan (who has an excellent Youtube channel by the same name – check out his wonderful collection of vintage and modern receivers) previously suggested I buy, for similar reasons, the Sony ICF-SW100. That little masterpiece of electronics turned out to be one of the best receivers I’ve ever owned. I felt compelled to take notice because Tom never gets this stuff wrong! A few days later I found myself in Maplins – again – and there it was on the shelf at just under £40, so I bought one.

I got back into shortwave listening about 18 months ago, after many years of inactivity whilst my poor Sangean ATS-803A rotted away in the garden shed and Sony ICF-7600G long-gone via eBay. To start all over again, I bought a Tecsun PL-360.  What a great little portable that turned out to be – there are over 100 reception videos on my YouTube channel demonstrating how it continually performed above and beyond the very modest price tag. I even managed to hear ABC Northern Territories 4835 kHz on it once –  simply amazing for a receiver under £30. Given my extensive experience with the PL-360 and having learned the PL-310ET shared the same DSP chip, I was expecting the same, or at least very similar performance and the only real benefit to upgrading to the PL-310ET was the direct frequency access.  However, I was wrong about that!

pl-360

The brilliant Tecsun PL-360 got me back into shortwave radio for less than £30

About a week after buying the PL-310ET,  I managed to get out on a DXpedition and with 30 metres of wire attached to it via the external antenna socket, I started tuning around the SW bands. Quite simply, I was amazed at the sensitivity and selectivity of this diminutive little portable. With the proven DSP receiver chip and a number of audio bandwidth filter options  from 1 to 6 kHz, coupled with direct frequency access via the keypad, it was a joy to use and listen to. In just over an hour I had  copied signals from North Korea, including their internal service KCBS Pyongyang, Zanzibar BC, ABC Northern Territories (at the first attempt!), Zambia NBC Radio 1, Radio Oromiya and Radio Amhara from Ethiopia, amongst others. Brilliant stuff and clearly demonstrating that the overall hardware/software package with the PL-310ET is a step up in performance over the PL-360 and capable of proper DX for a very modest outlay. Interestingly, in a conversation with Thomas Witherspoon regarding the PL-310ET, he reminded me that it was one of his go-to radios for travelling and confirmed it’s excellent performance.  I would definitely recommend this radio to novices and experts alike.

Reception videos follow below, with more to come in part 2; I hope you enjoy them. Thanks for watching/listening and I wish you all excellent DX!

 

 

Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.

Review of the C. Crane CC Skywave portable radio

CC-Skywave-1While electronics manufacturer C. Crane offers a number of unique AM/FM radios, including some of the best portable medium wave receivers on the market, they’ve traditionally only had two models of shortwave radio––namely, the CCRadio-SW, and the CCRadio-SWP. Earlier this year, however, C.Crane announced a new portable that would join their product line: the CC Skywave.

Admittedly, I was eager to give this little radio a go: C. Crane touts the Skywave as an exceptional travel radio, for which I’m always on the hunt.  Last week, I had my opportunity when C. Crane sent me the new CC Skywave sample for review.  I instantly got to work scrutinizing their newest offering…and here’s what I’ve discovered.

First impressions

CC-Skywave-FrontThe form factor of the Skywave is very similar to C.Crane’s CCRadio-SWP pocket radio; in fact, its smooth plastic body even feels the same. While this radio doesn’t have the rubberized coating that have become popular on radio exteriors in recent years, supposedly to provide an easy-to-grip surface, I’m pleased that C.Crane does not use this, as these coatings can eventually deteriorate over time and with heat exposure, becoming somewhat tacky or sticky to the touch.

CC-Skywave-DisplayThe Skywave’s backlit LCD display is small, but readily viewable from several angles.  All of the buttons on the front of the Skywave have a tactile response, again, similar to the CCRadio-SWP. The buttons require slightly more pressure to activate than Tecsun and Degen models; I prefer this, especially for a travel radio: should I forget to activate the key lock, it’s much less likely that the radio will accidentally turn on during transit.

As always, I attempted first to see how many radio features and functions I could uncover without first consulting the owner’s manual.  In the past, C.Crane products have been some of the most intuitive on the market.  Fortunately, the Skywave did not disappoint: first, I was able to set both the clock and alarm within moments; both essential in a travel radio.

Once the radio is on, it will display either the time or frequency on the main display. While the Skywave defaults to a time display, I discovered that the lock button toggles the display between time and frequency for ten seconds. (Note: After reading through the manual later, I learned that you can actually change the default display mode to either time or frequency–very nice touch!)

CC-Skywave-Keypad

I then turned on the radio and found the memory allocation to be very straightforward: tune to the desired station, then press and hold a number button two seconds to save. Press a button quickly to recall. Memory remembers bandwidth, stereo, or mono (if FM), and any voice or music audio filters utilized–very handy!

Speaking of bandwidth, the Skywave has five on shortwave, medium wave, and air bands: 6, 4, 3, 2, and 1 kHz. By pressing the bandwidth button, you can cycle through these from widest to narrowest. The bandwidth defaults to 3 kHz, but the default can be changed by holding down the bandwidth button for five seconds (with radio powered off).

To enter a frequency in AM/FM/SW, you simply press the FREQ button, then key in frequency. To scan through the band, simply press and hold one of the up/down arrow buttons. Worth noting: the Skywave’s scan function is one of the fastest I’ve seen in a portable.

On the topic of scanning, and since this is a travel radio, I would have liked C.Crane to include an ETM function like that found in the Tecsun PL-310ET and PL-380. It’s quite a handy function for auto-populating temporary memories from a simple band scan. I assume this is not an option on the DSP chip powering the Skywave.

Owner’s manual

Once I had my fun trying to discover as many functions on the Skywave without the manual’s aid, I finally opened it and discovered a few more functions.

One feature I’ve already come to love in the Skywave: the ability to change the tuning speed, and thus frequency step-spacing on the tuning knob (option of 5 or 1 kHz steps), just by pressing the knob itself. I much prefer this to using a front-panel tuning step button because it’s so easy to operate in low-light settings (lounging in bed, for example).

CC-Skywave-Tuning-KnobAnother unique feature of the Skywave is a switchable audio filter for voice or music. With the filter set to “voice,” the audio is enhanced for human voice intelligibility. When set to “music,” it widens the audio filter, thus optimizing audio fidelity. Toggling the audio filter settings between voice and music is very easy, but not intuitive; indeed, it’s almost a hidden feature you can discover via the owner’s manual. Simply press the “1” and “2” simultaneously while listening to a broadcast to toggle the filter.

I should note that the C.Crane owner’s manual is one of the most straightforward and simple I’ve seen in ages. You can tell that, at least in the English version that came with mine, this manual was written by a native English speaker. It made for simple, clear instruction without head-scratching over obscure terms. Even the least technically-inclined user will understand these instructions, no problem.

AM – Medium Wave

After asking SWLing Post readers what they would like me to include in this review, a number of you responded that you wanted me to give the AM broadcast band reception a proper review.

Zoomer_RadioMy foray into medium wave listening with the Skywave started off on the right foot.  The very first night with the Skywave, I tuned it to 740 kHz, my favorite, albeit challenging to reach, AM station here in the North America–CFZM “Zoomer Radio”  While those living in the midwestern and northeastern US can receive Zoomer radio easily enough at night, it is often a tough catch here in the southeast in the evening hours. After nightfall it competes with clear channel stations that also occupy 740 kHz. With a portable radio, the lock on Zoomer is never terribly strong and is very prone to fading.

But after tuning the Skywave to Zoomer, I received CFZM so well it sounded like a local station–in fact, I couldn’t believe it until a station ID confirmed that I was receiving it. Even more surprising was that I received it away from home, in an area plagued with RFI noise where I typically have to carefully turn a radio to null out the noise in an effort to enhance the desired broadcast. But the Skywave somehow mitigated this noise better than my other portables. Even when I turned the radio in the direction of the offending electrical noise, it wasn’t as bad as on other portables.  Truly, the reception was remarkable.

With Zoomer firmly locked in, I hopped into bed, turned the volume to a comfortable level, and listened for at least half an hour before falling asleep. I was pleasantly surprised the following morning, some eight hours later, when I woke to the Skywave playing CFZM at the same level. Phenomenal! Perhaps conditions were exceptionally favorable that night; nonetheless, the Skywave couldn’t have impressed me more.

A side note–on the previous day, I’d inserted two generic alkaline AA batteries in the Skywave; after a total of ten hours playing at medium volume, the battery indicator still showed full capacity.

CC-Skywave-RightMedium wave audio samples

While time won’t allow a full audio sampling of the medium wave band for comparison, I did record the following comparison between the Skywave and the Tecsun PL-310ET (which I regard as one of the more capable sub-$100 ultra-compact portables on the market).CC-Skywave-And-Tecsun-PL-310ET

Since SWLing Post readers specifically asked to hear how the Skywave handles choppy nighttime medium wave DX conditions, I tuned to two frequencies with overlapping broadcasts, one of which was slightly dominant: 950 kHz and 990 kHz. I set the AM bandwidth to 3 kHz on both radios and made the recordings within one minute of each other. The CC Skywave’s audio filter was set to “voice.”

In the following recordings, listen for Radio Reloj  (Cuba)–it’s buried deep in the noise. You might detect the ticking and “R” “R” in Morse code. These recordings were taken within one minute of each other.

The Tecsun PL-310ET on 950 kHz:

The CC Skywave on 950 kHz:

Note that the Skywave pulled out the dominant broadcaster–one I could barely hear on the PL-310ET.

I then made a recording on 990 kHz AM which had a stronger dominant station.

The Tecsun PL-310ET on 990 kHz:

The CC Skywave on 990 kHz:

To my ear, the Skywave was clearer and the commentator’s voice seemed to pop out of the noise better.

I’ve spent a great deal of time listening to the Skywave on the medium wave band this week and I feel comfortable recommending it for the medium wave DXer.

FM

While I’ve spent comparatively less time (thus far) evaluating the Skywave’s FM band, I can say that the Skywave receives my “benchmark” FM stations with ease. Sensitivity also seems to be on par with my other DSP based portables (meaning, excellent sensitivity).CC-Skywave-Left

Shortwave

Of course, being a shortwave enthusiast, I’ve spent the bulk of my listening time since receiving the Skywave on the shortwave bands. And during this time, alas, shortwave radio band conditions have been challenging for any radio. Yet I’m happy to note that this little radio does not disappoint: it has excellent sensitivity and selectivity for a radio of its size. When I compared the Skywave with the Tecsun PL-310ET, in almost every situation, they are nearly equal in performance.

Shortwave audio samples

Below I’ve included audio samples of the Skywave on 9580 kHz (Radio Australia). Under normal conditions, Radio Australia would be a blowtorch signal here in North America, but this particular morning, propagation was quite poor. In the audio, you’ll hear both radios attempting to cope with pronounced fading, with their AGC circuits reacting to the quick rise and fall of signal strength. Both radios were set to a 3kHz bandwidth and the Skywave’s audio filter set to “voice” to help mitigate noise.

CC-Skywave-And-Tecsun-PL-310ET-Side

Tecsun PL-310ET on 9580 kHz:

CC Skywave on 9580 kHz:

Note that Radio Australia was broadcasting music, which can be more difficult to evaluate, but the vocals were prominent enough I felt it made for a good comparison.

This morning, I also recorded WWV on 15 MHz. Again, propagation conditions were poor across the bands, so even WWV (normally very stable) was affected by quick fading (QSB). For kicks, I decided to add the benchmark Tecsun PL-660 to this comparison. If you recall, it received some of the highest marks for sensitivity in our weak signal shoot out. The Tecsun PL-310ET and CC Skywave were set to 3 kHz bandwidth and the Tecsun PL-660 to it’s narrow bandwidth (which I felt was most equivalent).

CC-Skywave-PL310ET-PL660

Tecsun PL-310ET on 15 MHz:

Tecsun PL-660 on 15 MHz:

CC Skywave on 15 MHz:

The good news is that the Skywave is certainly a sensitive and selective portable. While evaluating shortwave performance over the past week, I’ve been pleasantly surprised by how well this little radio receives.

NOAA Weather radio

NOAA-Weather-RadioThose of us living or traveling in North America will appreciate the Skywave’s built-in NOAA weather radio functionality.  Since I have at least a dozen self-powered radios and desktops that have built-in NOAA weather reception, I typically don’t give the band much thought. I figured NOAA reception would be a mediocre add-on with the Skyview. I was wrong.

Not only does the Skywave have NOAA weather radio, but it also has SAME weather alerts. What’s so great about that? Imagine that you’re travelling to a rural area and weather is looking ominous; in this case, you can simply set the Skywave to the strongest NOAA channel and activate the weather alert (choose options for 4, 8, or 16 hours). If severe weather is reported for your geographic area, the Skywave will alert you.

I’m very pleased with the NOAA weather radio reception, as well.  The Skywave receives NOAA stations even better than one of my dedicated weather radios.

AIR band

AirTrafficControllerC.Crane included the Air band for travelers, as a means to listen to air traffic control while in an airport or awaiting a flight’s arrival. I have several portables with the AIR band, but most lack an autoscan ability (Grundig G3, G6), and performance on these tends to be mediocre at best.

I’ve traveled to three different cities over the past week and used the Skywave to tune to the local air-traffic control tower. After a bit of scanning, it eventually found the frequency, and reception was quite good. I have not yet used the AIR band in an airport (notorious for RFI) nor in a large metro area, so I can’t comment about performance under those conditions.

What really separates the Skywave apart from my other shortwave portable with the AIR band is that it actually has an adjustable squelch mode. Nice touch!

CC Buds Earphones

HDP-AUDIO-CC-EAR-BUDSUnlike Tecsun portables which typically ship with batteries, an external antenna wire, chargers, travel cases, and the like, the CC Skywave comes with very few included accessories––just a carry case, an owner’s manual, and earphones.

Most of the headphones/earphones that accompany a shortwave radio package are of the cheapest quality. I’m happy to note that the Skywave’s included earphones are the best I’ve ever received as an included accessory with a shortwave radio.

The CC Buds Earphones are in-ear style (which I prefer, for sound isolation) with soft silicone earpieces. They are tuned to a frequency response which favors voice, an enhanced mid-range. For SWLing and MW DXing, I believe they’re nearly ideal. Indeed, I’m planning to use these with my Elecraft KX3 next time I’m operating QRP––I’m sure that SSB will sound great.

Since these are tuned for the spoken word, however, I wouldn’t necessarily favor the CC Buds Earphones over my Sony in-ear buds for music listening.

CC-Skywave-Top

Summary

Every radio has pros and cons, and I jot down my reactions as I evaluate a new radio so as not to forget any details. The following is my list:

Pros:

  • Overall great sensitivity and selectivity for a portable in this price class
  • Considerate design, well-tailored for the traveler:
    • Compact size
    • Air band
    • NOAA weather radio
    • Easy to set clock and alarm
    • Simple controls
    • Lightweight
    • Operates on 2 AA batteries
    • Charges from Mini USB (see con)
  • Wide HF frequency range (2.3 up to 26.1 MHz) compared to the PL-380/PL-310 (2.3 up to 21.95 MHz)
  • AIR band is truly functional: includes both scanning and squelch
  • NOAA Weather radio reception excellent
  • Includes soft silicone earphones (in-ear type) actually worthy of AM/SW listening
  • Auto scanning with the up/down buttons is very rapid
  • Integrated charging circuit
  • Uses common micro USB port for power/charging
  • Tuning speed easily changed by pressing tuning knob
  • Volume control is fully variable (free wheel, analog style), not in pre-determined digital steps
  • Selectable audio filters for music and voice

Cons:

  • Internal speaker audio is somewhat tinny (use of the voice audio filter helps)
  • No external antenna jack
  • No SSB mode (in this price class of $90 US, SSB is an included mode on some models)
  • Only one clock; no provision for dual local/UTC time
  • Mutes between frequency changes
  • Whip antenna is short––only 16” fully extended. While the Skywave seems to perform brilliantly with this short antenna (see pro), I can’t help but wonder if more length might boost some bands.
  • While no inconvenience to me, the Skywave does not come with an adaptor or USB cord for powering/charging. (Should you need it, C.Crane sells a proper noise-free regulated power supply separately ($15 US); however, most buyers will already have these cords and any USB port on your PC or USB-based phone charger will suffice. Also note that listening to virtually any radio while charging will inject noise into the receiver, resulting in sub-par reception.)
  • Can overload on shortwave and AIR bands if located near a strong radio station (see this comment)

Conclusion

The CC Skywave is nearly identical in size to the late and great Grundig G6.

The CC Skywave is nearly identical in size to the late and great Grundig G6.

C. Crane has few shortwave radios in their product line, and all perform rather well for their price point; I know, as I have owned all of them and even purchased as gifts in the past.

But I was concerned a few months ago when I noted the similarity between the CC Skywave and the poorly-reviewed Digitech AR1733, sold in Australia/New Zealand by Jaycar.

Fortunately, it’s clear that C. Crane noticed the shortcomings of the AR1733 and has modified the Skywave’s design and firmware accordingly, which may account for the delayed roll-out of the CC Skywave. Obviously, the Skywave’s ACG circuit has been tweaked to cope with medium wave and shortwave listening, since a poor ACG circuit is one of the shortcomings of the AR1733. But, if so, wow…what a tweak.

Because all in all, the CC Skywave is a excellent little radio. Indeed, in terms of the ultra-compact portable market (models like I included in a recent shoot-out), I think it’s one of the best surprise performers I’ve seen in the past couple of years.

CC-Skywave-1After just one week with it, I’ve already decided to take the CC Skywave along on my travels to see how it performs over time. It will replace my PL-310ET and PL-380 for my one bag domestic and international travelling. The CC Skywave is also especially well-suited for the “go”-bags and “bug-out” bags used in evacuations and other emergencies. Indeed, with AM/FM/SW/AIR plus functional NOAA radio, this little radio packs a lot––in short, the Skywave packs enough to get packed in my bag.

The CC Skywave can be purchased directly from C. Crane. It is also available at (soon) Universal Radio and Amazon.com.