Aziloop DF-72 天线系统
Groundbreaking dual-mode stepped azimuth VLF to HF receiver solution.
RadCom Review May 2024 (Authorized by RSGB)
(Also published in the June 2024 issue of Practical Wireless, pg. 6)
What is it?
The Aziloop DF-72 is a dual-mode multidirectional antenna system for VLF to HF reception with the following features:
Unbeatable at this price point (or anywhere):
- Use an antenna with low visual impact and a small footprint, consisting of a pair of orthogonal rings and a ground wire.
- Stepped azimuth technology for electronic rotation. The actual antenna remains stationary.
- Control everything with an intuitive Windows UI that selects local, client, or server mode.
- Dual-antenna mode. Toggle between loop mode and K9AY mode with the mouse wheel or buttons.
- 108 antennas in one: 72 K9AY directions and 36 annular axes. It only takes 60 milliseconds to switch with the mouse.
- Switchable 18 dB preamp and 4-stage attenuator (0 - 18 dB) provide level control up to 36 dB.
- Four 7-pole pre-selected filters make it easy for your receiver.
- 可变 K9AY 负载。 250 Ω 至 950 Ω，每级 50 Ω
- Two control/monitoring ports for your own use, or assign one or both of them to PTT Mute.
- Headless remote control via the Ethernet server built into the controller (no PC connection required).
- Omni-Rig supports auto-filtering, PTT mute, and rig sync (keeping Rig A and Rig B in sync)
We offer:
Antenna device: A white box with blue text printed on it
Controller: A black box with ports and interfaces
application
Screenshot of your computer
Hide unwanted panels
Over to you:
Add a clean 13.8 V power supply, a Windows PC, and an antenna of your own making, the size of which should provide the best performance for your use case and location.
The antenna sizes below are a good starting point for urban locations. The optimal size depends on the target frequency range, site noise, and system noise (shown as a single loop. The second identical loop is at 90 degrees to complete the installation. LCUs can be installed inside or outside the loop).
Schematic diagram of a triangular structure
Who Should Consider Aziloop?
Shortwave listeners, radio amateurs, and professional users will be interested in Aziloop. Applications include general monitoring, co-channel station analysis, basic direction finding, atmospheric and electromagnetic interference reduction, and interference mitigation. And, of course, the joy of learning to spread knowledge and discovering what flaws there are in the antennas you used before.
Product positioning
Aziloop has features that a single-loop antenna can't offer. In different market segments, Aziloop is a sensible first choice and a beneficial upgrade for discerning listeners.
Professional users
Aziloop offers a feature set that meets your project requirements at a fraction of the expected cost, especially for tactical/SIGINT deployments. Custom builds are also possible.
Dale 推荐 Aziloop DF-72 天线系统
I'd like to mention the reception-only antenna I use for QTH at home. I did a lot of NDB recordings below 500kHz in the winter, and also did some DXing and 160M in the AM band. In the past, I've used a bever antenna, a homemade flag antenna, a shared Apex Loop array, and last month I installed a new Quiet Radio AziLoop.
With the array solution, the AS-SAL type antenna, I can rotate motorically in 45-degree increments, and I can flip the direction 180 degrees or rotate it in both directions.
You can learn about the features of AziLoop on Dave's website. But its most prominent feature is that it rotates electrically every 5 degrees and has two modes – a small RX loop and a K9AY. In K9AY mode, I can achieve up to 30 dB F/B with very clear rear clearance. If it weren't for the 5-degree rotation, you wouldn't even see the rear clearance.
But that's where it really stands. The K9AY is designed to have a termination resistor, just like the Banner and the Ewes. By changing this resistance value via the AziLoop app, you can achieve a sky wave sky. The value of this termination resistor changes from day to night, etc. So, with this feature, I can often reduce co-frequency or adjacent frequency QRM or thunderstorm QRN. Small loops, also known as magnetic loops, do not do this. They are omnidirectional to the skywaves.
In conclusion, I mention this because some of your site's ham and SWL readers might find it interesting.
I built my equipment with fiberglass telescopic poles, which are completely self-contained - no loops on the ground piles, etc.
I don't have any business relationship with Quiet Radio, just a very happy customer.