Showing posts with label Longwave DX. Show all posts
Showing posts with label Longwave DX. Show all posts
Saturday, 21 January 2017
MW DX with 200 metre Beverage: CKAC 730 kHz Montreal, Quebec, heard in Oxford, UK
Only the second time I'd copied CKAC, the first being an hour earlier on the same morning. Again, tricky to hear well because of adjacent QRM, but the Elad mostly deals with it very well in USB. Recorded on 10/10/16 at 02:57 hrs UTC using an ELAD FDM DUO. Thanks for watching.
Monday, 16 January 2017
Urban DX antenna test #5: Comparing 30 metre longwire to Boni whip on LW
Hi there, here is the fifth and final video in this series comparing the Bonito Boni whip to a 30 metre longwire in an urban environment. This time the target signal is Polski Radio on 225 kHz longwave and finally the Boni whip produces clearer audio than the longwire. Despite a significant increase in noise floor, the SNR appears to improve a little. The Wellbrook reception at the end of the video is a final calibration as to what is possible with an H field antenna in a noisy urban environment. Thanks for watching.
Labels:
Active loop,
ALA1530,
Amateur radio,
Antenna,
Boni whip,
Bonito,
FDM DUO,
Longwave DX,
Longwire,
Magnetic loop,
Oxford Shortwave Log,
Polski Radio,
QRM,
SDR,
Wellbrook,
Wellbrook ALA1530,
Wellbrook loop
Wednesday, 11 January 2017
Bonito Boni whip versus Wellbrook ALA1530 test #7 winner: Wellbrook (7 wins out of 7)
Hi there, this is the final test comparing these two antennas in my noise-laden shack, using the Afia Darfur signal on 9510 kHz, from Santa Maria di Galeria, Rome, Italy. Once again, reasonable reception on the Wellbrook with an audio bandwidth filter of 6.6 kHz and a signal pushing over S9. However, once the whip is connected, the noise floor increases by more than 10 Decibels and the signal almost dissapears under the blanket of amplified noise. So it's 7 wins out of 7 for the Wellbrook, but I'm not giving up. For the next test, I'm interested to see how the whip performs against a 30 metre piece of wire slung around the garden - a less than ideal arrangement I used for some time before I purchased the Wellbrook. Then finally I'm going to take them both out to the woods and run another comparison. I must reiterate that I really want the Boni whip to prove itself an excellent performer in a quiet environment, because that would give me an excellent, very portable antenna to use on DXpeditions. Thanks for watching.
Labels:
Active loop,
ALA1530,
Amateur radio,
Antenna,
Boni whip,
Bonito,
DXing,
DXpedition,
Longwave DX,
Medium wave DX,
Oxford Shortwave Log,
QRM,
SDR,
Shortwave listening,
Shortwave radio
Tuesday, 10 January 2017
Bonito Boni whip versus Wellbrook ALA1530: Test #6 winner: Wellbrook
Hi there, I've taken a different approach this time - by using what is probably the strongest signal on shortwave at my QTH - CRI on 6020 kHz. With an 18 kHz audio bandwidth filter, audio fideltiy on shortwave doesn't really get much better than this. As might reasonably be expected wiht a huge signal, the difference in the performance of the two antennas based on audio fidelity at least, is much less obvious, despite the signficant drop in SNR with the Boni whip. One more reception video to come, to conclude this first series of tests. Thanks for watching.
Bonito Boni whip versus Wellbrook ALA1530: Test #5 winner: Wellbrook
Hi there, here is test number 5 and the first with a signal on shortwave - Radio Habana, Cuba on 6060 kHz. I would describe the signal strength and audio fideltiy as about average with the Wellbrook ALA1530 active loop. However, switching over to the Bonito Boni whip results once again in a significant increase in the noise floor - just over 10 decibels this time, but that's still very significant and the resulting loss of signal modulation is clear to see and hear. I'm still hoping that a trip to the QRM free woods in Oxfordshire will result in a much reduced SNR performance delta between these two antennas. Thanks for watching.
Monday, 9 January 2017
Bonito Boni whip versus Wellbrook ALA1530: RÚV Iceland, LW Test #2 winner: Wellbrook
Another disaster for the Bonito Boni whip. Here RÚV Iceland can be clearly heard with very decent signals on 189 kHz and 207 kHz using the Wellbrook ALA1530. Switching over to the Boni whip results in no discernible audio with the disappearance of both Icelandic signals under a blanket of noise. I've never seen anything like it and I actually reverted back to the Wellbrook to confirm this was as a result of the Boni whip antenna. Terrible peformance, even worse than the previous example with Medi 1. Hopefully, the situation will improve on MW and SW. Thanks for watching.
Bonito Boni whip versus Wellbrook ALA1530: Test #1 winner: Wellbrook
Hi there, here is a signal from Medi 1 on LW 171 kHz with nice audio on the Wellbrook ALA1530. Watch as the Wellbrook is unplugged from the Elad FDM DUO and the Boni whip connected (using the supplied radiating element). The noise floor jumps by around 20 decibels and the resulting audio is severely compromised. I read that the Boni whip is often very ineffective in buildings, so I put both antennas in the garden to give it the best chance of success. The problem is however, that my garden is often noisier that inside the house because our neighbours surround us quite closely on three sides. Anyway, test number 1 is a disaster for the Boni whip. Let's see what happens next. Thanks for watching.
Labels:
Active loop,
ALA1530,
Elad,
FDM SUO,
Longwave,
Longwave DX,
LW,
Magnetic loop,
Medium wave,
Medium wave DX,
MW,
MW DX,
Noise,
QRM,
SDR,
Shortwave listening,
Shortwave radio,
Software defined radio,
Wellbrook
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