Airspy Ranger

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tuihill

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Technical Specifications
• Frequency Coverage: 0.5 kHz - 1.750 GHz

HF: 0.5 kHz - 31 MHz

VHF-I: 31 - 66 MHz

VHF-II: 66 - 118 MHz

VHF-III: 118 - 260MHz

UHF: 260 - 1750 MHz

Will be around $250. Availability in 3 Months.
Apparently the upcoming Ranger has an aluminium case. I have an HF+ Discovery in the plastic case.
What with all of the interference in the average home, we try to shield the link between the antenna and the radio in coaxial cable. Is this not wasted effort if the radio itself isn't shielded?
Would I have anything to gain by carefully wrapping the HF+ in foil?
Cheers.
 

merlin

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Apparently the upcoming Ranger has an aluminium case. I have an HF+ Discovery in the plastic case.
What with all of the interference in the average home, we try to shield the link between the antenna and the radio in coaxial cable. Is this not wasted effort if the radio itself isn't shielded?
Would I have anything to gain by carefully wrapping the HF+ in foil?
Cheers.
I bought Airspy HF+discovery. the case is alluminum. does far better at noise reduction than two Noo dongles I have. Better dymic range too.
I like the notion of following development for new radios, but to predict when this Ranger will hi the market is premature.
After R/D, then prototyping, then testing, then you can say you have a new kid on the block and have an idea of relese dates.
Surely there are hardware and sofware bugs to be worked out.
The specs do a lot of talk, now if it will walk the walk, I will certainly be grabbing one. My discovery of course is a keeper, it's been great.
Like all SDRs though, the drivers are critical, they can make or break an sdr.
 

SigmaDelta

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Apparently the upcoming Ranger has an aluminium case. I have an HF+ Discovery in the plastic case.
What with all of the interference in the average home, we try to shield the link between the antenna and the radio in coaxial cable. Is this not wasted effort if the radio itself isn't shielded?
Would I have anything to gain by carefully wrapping the HF+ in foil?
Cheers.
Metal enclosures are not the holy grail. Nowadays you have 4,5 or 6 layers PCB's with a very elaborate grounding design.
I have some RF devices perfroming great as only a PCB or in a plastic box. Some other designs definitely need an extra ground from enclosure. Ferrites on all leads often do help! On the coax to the antenna, but especially to the PC.
 

tuihill

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Metal enclosures are not the holy grail. Nowadays you have 4,5 or 6 layers PCB's with a very elaborate grounding design.
I have some RF devices perfroming great as only a PCB or in a plastic box. Some other designs definitely need an extra ground from enclosure. Ferrites on all leads often do help! On the coax to the antenna, but especially to the PC.
I've bought some clamp on ferrites to try. I didn't know they could be useful on the antenna coax as well as the nearby powered devices. My Airspy came with a sturdy usb cable that has a factory embedded ferrite.
 

SigmaDelta

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I've bought some clamp on ferrites to try. I didn't know they could be useful on the antenna coax as well as the nearby powered devices. My Airspy came with a sturdy usb cable that has a factory embedded ferrite.
By using beads or clamps on the coax you suppress any (house/PC) RFI travelling to the antenna over the coax shielding.

 

Ubbe

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Radio signals are waves and you will want a ferrite to be at where the RF wave are at its voltage maximum. It will be difficult to know where that will be on a coax and will also change depending of the frequency of the signal. If you cover 1/4 wavelength of the lowest frequency of the unwanted frequency with ferrite cores it will be fine. If you have the coax go several turns inside a ferrite it will of course also cover a wider length of coax using fewer ferrites.

/Ubbe
 
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