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#1
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"BD" wrote in message ... My response/question is not intended to antagonize or troll. I would love to purchase the TenTec DRM capable system. It's something I'd love to "mess" with. Unfortunately (in a way), I've got broadband Internet and with radio-locator.com I can get music/news from around the globe. This is without drop outs, completely digital and only some stations sound a little "phase shifty" if they stream slowly. I've got the money for the radio but now it seems like it might be redundant. And I can imagine, instead of fun trying to bring in a station, it will just seem like "make work" since I can just point and click around the globe. You know? Unless you're in the market for a new receiver, I would not purchase the RX-350 strictly for DRM reception. The receiver needs to appeal to you for other reasons as well. If you buy it just for DRM, you will be disappointed by the few DRM stations available. I just dabble with DRM because it's there and because I can. I agree with you about the Internet. I like to listen to Polish broadcasts via the Internet and there are many from Poland to choose from. The reception is, for the most part, good to very good. I believe the shortwave medium is dying and being replaced by the Internet and satellite transmissions. Al |
#2
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... I'm looking forward to this new receiver. How's the performance of
the synchronous detector? 73, Fred E. N8UC -- Detroit Fred, I didn't see a response from Al on this, so I'll take a stab... The synchronous detector in my recently-arrived and updated RX-350D stays in lock until it's faced with a good jolt of static like from thunderstorms a few hundred miles away. It also decides that it has lost lock during significant fades. It works better during fading with the AGC speed set to Medium rather than Slow, and better yet with AGC set to Fast. The synchronous detector also works better if the radio is tuned accurately to the station's frequency. To do that, I use the 1 Hz tuning resolution as I switch from lower side-band to upper and back, tuning for the same pitch on the audio components of the AM signal. Then I try the synchronous detector again. Or I just leave it in sideband mode. When the synchronous detector loses sync, the receiver apparently reverts to AM mode with a click, a change of audio level and a change in the audio frequency response. Then the synchronous detector will reaquire the signal and go back to the initial set of audio conditions. This switching is quite intrusive. So when the going gets tough, I just use the upper or lower sideband mode. The carrier injection of this mode is totally reliable since it is locked to a crystal in the receiver. It also allows the use of the auto-null filter on strong heterodynes whereas the synchronous detector disables the null filter. The sideband modes don't boost the low audio frequencies like the synchronous detector does. The sideband modes are my preferred modes for marginal AM signals. These modes behave nicely. The only downside is the task of getting the receiver tuned exactly on frequency. Come to think of it, I use the synchronous or AM detector when tuning through the broadcast bands to avoid the heterodynes. When I find a marginal signal that I want to monitor, I'll switch to the sideband modes. A couple days ago I ran across some marginal 'pirate' station transmitting on 10253.250 kHz who was on a VFO and was drifting +/- 500 Hz. It was necessary to chase him with the frequency knob. This was one rare occasion where a better implementation of the synchronous detector would have helped. I would say that if you're not listening to shortwave primarily for non-DRM music that you ought to ignore the synchronous detector issue. Greetings, Henry AC5LA Email address: "see_signature" - "a0015717" Newsgroup replies may serve better the public interest. |
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