Re: Enclosure for Airspy HF+
#hardware
Trango <rfnoise@...>
Are the hot spots thermally taped to make contact with case? Hadn't seen this detail so wanted to ask.
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Re: Astro Spy - Signal Level Range
I would like to see the Astrospy software to be able to periodically log the averaged spectrum to a csv file. A couple of other things on my wish list, but this would be a good start.
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Re: Enclosure for Airspy HF+
#hardware
New pics of the HF+ enclosure with surface finish. Note the laser scraped surface for the USB fingerstock and the SMA connectors.
Now you won't be ashamed to show your radio to your non-ham friends. This one doesn't look like the typical weekender project :-)
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Re: Airspy HF+
Trango <rfnoise@...>
Excellent. I think have too many R0 AirSpys :) Looking forward to the AirSpy HF+
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Re: Airspy HF+
As you may have noticed, we also changed the USB connector in the Airspy R0 for a much better custom through-holes model that is currently used in the Airspy R2 and the SpyVerter.
We have had good experience with this one, so we will reuse it. Don't change a winning team. You can check the pictures here: https://groups.io/g/airspy/message/23229
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Hi,
I'm pleased to forward some good news from COMINT Consulting. Now Krypto500 v.1260 supports the Airspy R2 + SpyVerter "combo" natively. Krypto500 is a high performance software suite dedicated to narrow band signal analysis, classification and decoding. Have a look on the official announcement here: http://www.comintconsulting.com/blog/new-krypto500-version-released-ten-10-new-decoders/ Support for the upcoming Airspy HF+ will be added and announced when ready. If things go well, the SpyServer can also be of the party. Thanks! The Airspy Team ![]() ![]()
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Re: Airspy HF+
Trango <rfnoise@...>
How is the stain relief on that USB connector? The only issue I've had with AirSpys (past and present) are failures of the USB connector. In most cases it's repairable the first time, but after that, not so much.
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Re: Airspy HF+
This time, we have more space and the entire RF section reside inside a metal can.
The result is that when you disconnect the antenna, the noise floor drops to just 5 dB above the quantization noise. The 0 ohms resistors can be used to separate the HF path entirely, or multiplex it with the VHF input. The communication with the external world is done via LVDS, and was carefully matched for proper EMI management.
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Re: SDRsharp on a 64bit version of Windows 10
Win 10 x64 here,
Installed drivers as normal with Zadig, launched SDR# 1583 All worked as expected. Have you tried running as admin?
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I don't know either. Wait until you have a device that has an actual serial number.
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Mike Jackson <mde.jackson@...>
spyserver.config requests the 64-bit hex number where there's more than one device.
I'm testing spyserver ahead of ordering my AirspyHF+. I have an RTL-SDR based dongle used for ADS-B and have a second v3 RTL-SDR I want to stream using spyserver, both hosted on an RPi3. Running lsusb on the RPi3 shows these two relevant entries: Bus 001 Device 005: ID 0bda:2832 Realtek Semiconductor Corp. RTL2832U DVB-T
Bus 001 Device 004: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
How do I get a 64-bit hex ID from either (I actually don't know which is which!) Thanks, Michael
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Any idea of the software cost and is it open to anyone to purchase ?
Thanks, FLANO
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Re: Airspy HF+
jdow
Weeeeellllll, AirSoy 1 benefited a lot from some basic EMI treatment. AirSpy 2 benefited but not as much as 1. What I did is take a suitable tool and GENTLY flake off a narrow band around the edges of the inside of the front and back panels. I also flaked off the paint from the thin edges of the box proper. That way I got metal to metal contact all around the box. (Yeah, it's aluminum; but, it did make difference.) Then I gently flaked paint a little less than the gold lockwasher's diameter around each SMA connector hole on the outside face. And I flaked away some paint on the inside around the USB connector. I arranged for some braid to get pinched by the USB connector and reassembled the box. On R1 I got a good 30 dB improvement. On R2 it seemed to be somewhat less.
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Once that is done audiofeelie grade USB cables are nonsense. But good size (3/8" hole) ferrite sleeves can make an additional difference if applied both to the antenna feed and the USB cable. You can get decent help at UHF and higher frequencies with the the smaller 1/4" diameter ferrite sleeves. For AirSpy plus Spyverter I'd use the bigger ferrites. For UHF and up the littler sleeves may do better. Some of the trick is picking the ferrite material to use. If Ambidon is still in business.... They are so visit "www.amidoncorp.com/" . In the past they've been quite helpful. And they are (were) ham radio friendly. {^_^} Joanne
On 2017-08-06 13:48, prog wrote:
Everything is shielded. There's only one way to get your external noise inside the RF section (under the metallic can), and its' the RF input.
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Re: Ideas for cheap and effective loop antennas
Leif Asbrink
I made a 30 cm diameter, two turn loop using RG8.
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A 6.8 nF capacitor tunes it to 1.1 MHz. With one turn on the primary and 18 turns on the secondary I see 50 ohms on 1.1 MHz. The signal level is about 10 dB below what I see from a 10 meter wire antenna - and that is enough with a margin for a receiver with a low NF. Suppression of conducted interference is poor however. That is easy to fix - I will try to get the time to make a video showing the nature of the problem and how to fix it. The 30 cm loop when tuned to 1.1 MHz has a useful bandwidth of about 500 kHz (with a low noise receiver.) Adding a very simple amplifier would make the bandwidth MUCH larger. 73 Leif
A very good and cheap receiving loop antenna can be made from one turnWhy not rearrange the same one turn to achieve two turns with good shielding and balancing?
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Re: Airspy HF+
Mike Bott <mike_bott@...>
Covered with my Pixel RF Pro-1B.
-- Mike
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Re: Airspy HF+
Everything is shielded. There's only one way to get your external noise inside the RF section (under the metallic can), and its' the RF input.
In the other hand, there are less performance constraints on the USB link since we are only streaming 24.5 Mbps. Of course, you will always find more expensive snake oil audiophile grade usb cables in the Internet. I'd say put that money on a good antenna and better cables :-)
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Airspy HF+
Mike Bott <mike_bott@...>
I have been following this with anticipation. The question that comes up in my mind is will this ship with a quality, shielded micro-USB cable or should a start looking for one on my own?
Very much looking forward to the opportunity to place an order. -- Mike
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Re: SDR# questions (shortcuts and frequencies.xml)
#sdrsharp
Keyboard shortcuts could be added easily using a dedicated plugin if someone is motivated enough to cover all the controls - and there are dozens. The challenge here is to avoid messing with the different settings from third party plugins that may use the same shortcuts.
For the frequency xml database, you can use mklink as administrator to create links to the same target. Note that by doing so, if you manipulate the file in instance 1 of SDR#, other instances are not aware of the changes and may just overwrite the file causing data loss. If you just need one master file for all instances in read only mode, this should work.
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Re: Ideas for cheap and effective loop antennas
Maybe binocular ferrites can be a good compromise for the size, performance and reproducibility.
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