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#1
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Degen DE31 'portable' Shortwave "Active" Loop Antenna
Yes, the three major issues which people have with the usage of this
antenna a A) Connecting the wire/amp/loop out of order (so you only get the wire as part of the antenna and not the loop--- quite poor performance). " 4. the wire connecting the antenna to the battery compartment of the de31 is clearly FRAGILE and in the long run, will probably rip. tear, or ruin in the entire de31 due to the weight of batteries it must support, and the hanging style of the antenna from a window." Are you sure that you're attaching things in the right order --- the battery pack should have plenty of wire to be able to place on a table and not be hanging from the antenna. This is a link to a setup picture from Liypn's ebay ad for the antenna: http://images.blogcn.com/2006/5/13/5...6051394536.jpg But - in the URL I posted yesterday, they do mention that the tuning knob isn't the most robust (doesn't last too long, in some reports). B) Not being patient with the tuning. You really have to tune it slowly. First move it until you can hear the area of the dial where it 'clicks' and then move it much, much slower around that area to tune it perfectly. C) On radios without antenna jacks, not connecting the ground clip to the radio ground. The ground really removes alot of noise which you'd have, if you only connect the antenna clip. D) Not heard of yet -- but make sure that you don't have a dead battery! The antenna really does work -- but not nearly as well as the $100+ loops. By does work, I mean, in comparison to the built in rod antenna -- and an 'in the house' wire antenna. Comparing the in-house wire vs the DE-31, the biggest positive is the reduction of local noise. (The DE31 is shortwave only, they have another SW/MW model.) Always realize that when you test and compare antennas, sometimes the radio gets 'louder' -- but both the signal and noise get raised at a similar ratio as a result of the antenna...(especially an amplified antenna) and you can have a similar effect by raising the volume. According to at least some reviews, if you tune this antenna correctly, but have the Sony AN-LP1 on a frequency which is far off from Sony 'course tuning' points, the results are not too far. On frequencies which are closer to Sony's tuning points, there's no contest. http://www.radiointel.com/review-degende31.htm I tested it against my Torus Tuner Loop... it's also much better than the DE-31 - no contest... it was also much more expensive. Like the DE-31, the TT also has a full variable capacitor, so it can be tuned precisely, unlike the Sony. [I'm most probably going to sell my Torus Tuner soon, just because I usually use my shortwave while travelling and walking and I can't travel or walk with the Torus Tuner (I can't walk with the DE31 either :-) ). At home, I end up using web streaming most of the time nowadays. ] pure wrote: OK, after some more work on the dde31, I can offer the following info: 1- with new AAA rechargeables, the batteries are still going strong after 4 hours of use. So, I guess the previous opinion was based on either partially discharged batteries beforehand, or they had a hard time keeping their charge, from overuse. 2 - the reception on shortwave is greatly improved, no doubt, with the de31 and degen 1102, it's just that to obtain that great leap in quality, the plug has to be introduced ONLY HALF WAY into the of the degen 1102 external antenna jack!!! If I do push it completely inside, as it is supposed to be, the degen immediately loses all benefits of the external de31 antenna, even worse than using the whip withdrawn completely(. 3. I don't see any benefits so far, of the small dial on the battery case 4. the wire connecting the antenna to the battery compartment of the de31 is clearly FRAGILE and in the long run, will probably rip. tear, or ruin in the entire de31 due to the weight of batteries it must support, and the hanging style of the antenna from a window. 5, no benefits to am or fm 6. a leap in sensitivity for SSB no doubt is obtained with the de31.... I had problems with my DE31 until I figured out that the wire between the antenna and the radio was backwards. I had the tuner close to the loop at first, and it basically eliminated the signal. Maybe most people don't make this mistake though. I use duracell alkaline AAA batteries in my DE31 and they have been there since last winter. They're still working. Rotate the antenna so that the hole faces the direction of the transmitter. If plugging the antenna in seems to provide poor reception, try clipping it to the whip with the white clip, and clip the black clip to a ground wire |
#3
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Building A Better Degen DE31 'portable' Shortwave "Active" LoopAntenna - Any Ideas ?
So - What Are Your Ideas on What-Is-Wrong-With the
Degen DE31 'portable' Shortwave "Active" Loop Antenna ? And - What are Your Ideas to Make-It-Better ? ? ? iane ~ RHF .................................................. ...................... you might take a look on the loop group on yahoo. long discussion on the DE31 been going on for about 2 weeks. i tried it out last winter. along side my sony and my torustuner sw loop. came in last. i like the sony on the road. easy to take with you and set up. i have also hung it in the car. works a treat, if you keep the window up. gets you a few odd looks. for me the TT is tops. wish i had bought a second one. easy to use, and just the right size on my desk. as always, YMMV. Father Michael. |
#4
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Building A Better Degen DE31 'portable' Shortwave "Active" Loop Antenna - Any Ideas ?
For one, I'd like to be able to use the antenna passively (ie without
the amplifier). (I usually use my Torus Tuner Loop that way.) In another group, someone mentioned that the variable capacitor doesn't last long... That should be improved...(important for durability). Is anyone actually listening to the comments here? I also think that by the time we're done here, it may get as expensive as the 'good' loops are... What do you expect from this antenna, considering the price? Building a better Degen DE31 'portable' Shortwave "Active" Loop Antenna - Any Ideas : http://kaitousa.com/KA31.htm 1 - The very tiny Control Box should have been Twice-the-Size and Degen should have used Two "AA" Batteries vice 'aaa'. 2 - Add a "Fine-Tuning-Knob. 3 - Adjustable Gain Knob -or- Make the Off / On Power Switch into an Off / Lo / Hi / Power On and Output Switch. 4 - Add a Switch for either HI-Z -or- LO-Z Output. So - What Are Your Ideas on What-Is-Wrong-With the Degen DE31 'portable' Shortwave "Active" Loop Antenna ? And - What are Your Ideas to Make-It-Better ? ? ? iane ~ RHF . . . . |
#5
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Building A Better Degen DE31 'portable' Shortwave "Active" Loop Antenna - Any Ideas ?
RHF wrote: So - What Are Your Ideas on What-Is-Wrong-With the Degen DE31 'portable' Shortwave "Active" Loop Antenna ? Yada Yada Yada removed here for sake of bandwidth. And - What are Your Ideas to Make-It-Better ? ? ? iane ~ RHF . . . . I like antenna just fine as it is. But I would like it to maybe tune to 550kHz. So maybe have another plug in loop that is larger or maybe has more turns. Yes, Yes, that's it! Loops that plug in sorta like bandswitching coils in the old days. 73 NEO |
#6
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Building A Better Degen DE31 'portable' Shortwave "Active" Loop Antenna - Any Ideas ?
The DE33 / KA33 has MW as well... it even comes with a ferrite rod
coupler. http://www.kaitousa.com/KA33.htm N9NEO wrote: I like antenna just fine as it is. But I would like it to maybe tune to 550kHz. So maybe have another plug in loop that is larger or maybe has more turns. Yes, Yes, that's it! Loops that plug in sorta like bandswitching coils in the old days. 73 NEO |
#7
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Building A Better Degen DE31 'portable' Shortwave "Active" Loop Antenna - Any Ideas ?
The ferrite rod is for coupling to the radio inductively. It is not a
receiving element... wrote in message oups.com... The DE33 / KA33 has MW as well... it even comes with a ferrite rod coupler. http://www.kaitousa.com/KA33.htm N9NEO wrote: I like antenna just fine as it is. But I would like it to maybe tune to 550kHz. So maybe have another plug in loop that is larger or maybe has more turns. Yes, Yes, that's it! Loops that plug in sorta like bandswitching coils in the old days. 73 NEO |
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