{"id":2160,"date":"2011-11-12T19:24:26","date_gmt":"2011-11-12T23:24:26","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=2160"},"modified":"2012-12-03T07:11:31","modified_gmt":"2012-12-03T11:11:31","slug":"a-review-of-the-degen-de321-dsp-shortwave-radio","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2011\/11\/a-review-of-the-degen-de321-dsp-shortwave-radio\/","title":{"rendered":"A review of the Degen DE321 DSP shortwave radio"},"content":{"rendered":"
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This analog dial packs DSP!<\/p><\/div>\n

The Degen DE321 is the first of a new type of radio hitting the market–a DSP-based receiver with an analog tuning dial. I was very intrigued by this radio since both it and the future Tecsun R-2010 are the newest of their kind. We’re still waiting for the R-2010 to hit the market, but the DE321 was introduced just a few weeks ago.<\/p>\n

So, keep in mind that the DE321 I describe is not technically analog, although the dial and face appear to be.<\/p>\n

Impressions<\/strong><\/p>\n

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The Degen DE321 is slightly thinner than the Kaito WRX911.<\/p><\/div>\n

My first impressions of this radio are very positive. The DE321 is small, slim, and fits nicely in the hand. While holding it the first time, I even noticed a small indentation where my index finger fits on the back of the radio underneath the telescoping whip antenna. Nice touch!<\/p>\n

The DE321 also feels durable. It’s slightly thinner than the venerable WRX911–the radio I believe it best compares with in the analog world. It’s the first SW radio I’ve owned that can actually comfortably fit into the pocket of my jeans. Indeed, its size and form are fairly comparable to the typical smart phone.<\/p>\n

For a very tiny built-in speaker, the DE321 has unexpectedly decent audio. In fact, it is easily superior to the WRX911–its tones are more mellow and there’s even a hint of bass response. I’m sure the DSP chip has been tweaked to produce audio suitable for this application.<\/p>\n

\"\"<\/a>The DE321 has a nice, sturdy back stand for tabletop listening. However, it takes quite a lot of pulling force to get it to pop out of its closed position; I keep fearing that I will break the stand when opening it up. For what it’s worth, I prefer this tension to radios that have floppy, lose back stands.<\/p>\n

Tuning<\/strong><\/p>\n

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The DE321 has a tiny red tuning light that works well when you receive a strong signal.<\/p><\/div>\n

For a guy who was raised on analog tuning, yet now almost exclusively uses digital portables, the DE321 is a strange animal. When I first started tuning the radio, I noticed that the tuning wheel feels slightly “sticky.” At first, I thought the stickiness of the analog encoder was causing the tuning to skip over stations, as the action was not as fluid as most analog-tuned radios. Upon further investigation, I realized that it’s not the slightly sticky tuning wheel producing the tuning “skips,” rather, it’s the fact that the tuning is actually digital<\/em>, thus I was hearing the “steps” between frequencies, which tricked my brain, translating into the sensory experience of wheel stickiness. Still, since the tuning wheel isn’t terribly fluid, I am not discounting some real frequency skipping at times.<\/p>\n

I’m guessing that the steps are near 5 kHz on the shortwave bands, and that the single bandwidth is rather wide. The tuning steps on medium wave and FM seem to be appropriate for international use.<\/p>\n

On a side note, the tuning experience is exactly opposite<\/em> to that of the Grundig S350DL<\/a>–an analog-tuned radio with digital display. The S350DL’s tuning feels sloppy and flexible, and the receiver is prone to drifting. The DE321, on the other hand, has a vague analog tuning display, but with precise, incremented tuning behind the scenes.<\/p>\n

I’m pleased to note that the DE321’s stability is rock-solid and does not drift.<\/p>\n

For casual band scanning, I find that the bandwidth and tuning steps are well placed. Happily, there is no\u00a0noticeable\u00a0muting between tuning steps.<\/p>\n

Performance<\/strong><\/p>\n

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The Degen DE321 with its older analog cousin the Kaito WRX911 in the background.<\/p><\/div>\n

For this review, I compare the DE321 to the analog Kaito WRX911. The two have the same approximate size and price. In the near future, I’ll also compare reception with SiLabs DSP-based radios like the Tecsun R-2010<\/a> and the Tecsun PL-380<\/a>. (Check back for these comparisons soon.)<\/p>\n

On the shortwave bands, I feel that the sensitivity and selectivity are well-balanced. When I compare reception with the WRX911, the DE321 seems to pull in faint signals out of the murk a little better than the WRX911. However, I do notice some “pumping” as the AGC tries to cope with faint signals; it reminds me a bit of the Tecsun PL-310<\/a> in this respect. Sometimes I also notice that faint signals can range from being very faint to stepping up to clear and strong very quickly–the switch sounds like the DSP moving from not having enough signal to digest, to having enough to do its job. This can be a little frustrating as broadcasts may sound strong one minute, become weak within a fraction of a second, then pop back up again. I only observed this phenomena, however, when processing weak signals. Normal broadcast stations come in quite clearly.<\/p>\n

Though I chose not to spend much time evaluating FM and AM (please comment if you have done so<\/em>), I found the FM and AM (MW) performance to be on par with other radios using the SiLabs DSP chipset<\/a>. I may expand upon this in the review later. (Update 16 Mar 2012: With more time spent on AM (MW) I realize performance on this band is sub-par–see comments).<\/em><\/p>\n

Summary<\/h2>\n

Positives:<\/strong><\/p>\n