Date   

AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

rmrrgs
 

Hi Folks.

Saw a brief writeup on the YouLoop Passive Magnetic Loop Antenna that
recently became available. Cheap enough at only bout $ 30.

Am very weak on antenna theory, so let me please ask you experts out there.

I do only receiving, up to about 30 MHz.  No transmitting.

Presently use a 30 foot simple long wire outside.
Leaves a lot to be desired.
Due to space restrictions, would be hard to make longer.

a. Might anyone offer any opinions as to whether this antenna might be worth trying ?

b. What is the diameter of the loop ?

c. Is it "directional", in that I would always have to orient it to the station location I want to receive ?

    If so, Is it "very" directional ?  
         Most sensitive in the plane of the loop, or at 90 degrees to it ?

Would appreciate any thoughts on.
Pros and cons, limitations, etc.

Thanks,
Bob


Re: MW antenna for RTL-SDR V3

Zacharias Liangas
 

Yes. All loops are directional especially for medium waves . their radiation pattern is 8 shaped
This is the same  as with small radios using  ferrite loops for  MW reception.
Just search that for more  (loop directivity )


Re: Live Linux distro, does not work for USB boot?

doug
 

On 3/21/20 9:25 PM, Kai wrote:
I've tried writing the LiveSDR file to four different thumb drives with no success.
I've tried using Windows and Linux to burn the LiveSDR ISO to those different thumb drives.
Those same four separate thumb drives work no problem when I burn other ISO's to them.
I've tried burning the ISO on all available file system types - FAT, VFAT, Ext3, Ext4
Looks like some have success burning to DVD, the machine I'm using does not have a DVD or CD drive.
If anyone has any success burning to thumb drive please let me know.
Thank you all in advance for any useful suggestions.
You can get an external CD/DVD drive that connects thru a USB port. I have one on a laptop, and it works well. I can even use it for
LightScribe, which the laptop can't do with its internal drive. The unit I have is an LG "External Super Multi DVD Rewriter" Model GP08LU11.

--doug


Re: Live Linux distro, does not work for USB boot?

Kai
 

I've tried writing the LiveSDR file to four different thumb drives with no success.
I've tried using Windows and Linux to burn the LiveSDR ISO to those different thumb drives.
Those same four separate thumb drives work no problem when I burn other ISO's to them.
I've tried burning the ISO on all available file system types - FAT, VFAT, Ext3, Ext4

Looks like some have success burning to DVD, the machine I'm using does not have a DVD or CD drive.
If anyone has any success burning to thumb drive please let me know.

Thank you all in advance for any useful suggestions.

On 21/03/2020 8:29 pm, jdow wrote:
What do you see when you plug the disk in with another OS install up and running? If you see a lot of files it probably should work. If you see one file with a name that is the same as the file you burned you did it wrong. Study how to burn an ISO image with the tool you have available. Ask google.
{^_^}
On 20200320 10:57:21, michaeld wrote:
Yes, I had the same issue, says it is not a bootable ISO.

On Fri, Mar 20, 2020 at 8:04 AM Kai <needconnection@... <mailto:needconnection@...>> wrote:

    I was looking forward to using this on an older laptop with no HDD, but
    I haven't had any luck burning the ISO yet.

    Tried downloading with different browsers on different operating
    systems, burning to different thumb drives and using different thumb
    drive file types, with all the above I get an error that the process
    can't be complete.

    Anyone have similar problems?

    On 17/03/2020 4:17 pm, Shirley Dulcey KE1L wrote:
     > I just looked for it. The correct name appears to be SDRLive. But the
     > URL still uses the old linuxsdr name.
     > https://sourceforge.net/projects/linuxsdr/
     >
     > On Mon, Mar 16, 2020 at 11:04 PM Gregory Schippers <kc8hxo2@...
    <mailto:kc8hxo2@...>
     > <mailto:kc8hxo2@... <mailto:kc8hxo2@...>>> wrote:
     >
     >     Now renamed SDRLinux, the author has a new version. I can confirm
     >     operation OOTB operation with my HF+ Discovery using GQRX, CubicSDR,
     >     and SDR Angel, and that's with the live DVD!  quite impressed.
     >     Greg, KC8HXO
     >
     >



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Re: Live Linux distro #airspydiscovery

Kai
 

Yep, I'd try that except the machine I'm installing on doesn't have a DVD drive, there are no external DVD drives in local PC shops and scarce incoming freight due to corona virus lockdown.

On 22/03/2020 5:49 am, Gregory Schippers wrote:
I burned it to DVD. worked perfectly. FWIW.
Greg, KC8HXO
--
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Re: MW antenna for RTL-SDR V3

Ron Layton
 

Is the MLA30 directional so I can null out stations? I built a milkcrate loop that works very well but I want to get a bit more reach.


Re: MW antenna for RTL-SDR V3

Ron Layton
 

North Florida south of Tallahassee.


Re: Live Linux distro #airspydiscovery

Gregory Schippers
 

I burned it to DVD. worked perfectly. FWIW.
Greg, KC8HXO


Re: Live Linux distro #airspydiscovery

Greg Ella
 

I downloaded this on a Linux machine and burned it to a USB thumb drive.  I've been using Linux almost exclusively
for years, and I'm always making bootable thumb drives in order to try new distros.  This thumb drive would not
boot.  There is a readme file on the thumb drive saying to run a bat file that is in a Linux folder, also on the drive.
That procedure is supposed to make the thumb drive bootable.  I have never seen a requirement like this before,
and I did not try it, because I don't want to run a strange executable on my machine.  Maybe I will try it on a
Raspberry Pi.

Greg Ella
N0EMP


On Sat, Mar 21, 2020 at 7:02 AM jdow <jdow@...> wrote:
What do you see when you plug the disk in with another OS install up and
running? If you see a lot of files it probably should work. If you see one file
with a name that is the same as the file you burned you did it wrong. Study how
to burn an ISO image with the tool you have available. Ask google.
{^_^}

On 20200320 10:57:21, michaeld wrote:
> Yes, I had the same issue, says it is not a bootable ISO.
>
> On Fri, Mar 20, 2020 at 8:04 AM Kai <needconnection@...
> <mailto:needconnection@...>> wrote:
>
>     I was looking forward to using this on an older laptop with no HDD, but
>     I haven't had any luck burning the ISO yet.
>
>     Tried downloading with different browsers on different operating
>     systems, burning to different thumb drives and using different thumb
>     drive file types, with all the above I get an error that the process
>     can't be complete.
>
>     Anyone have similar problems?
>
>     On 17/03/2020 4:17 pm, Shirley Dulcey KE1L wrote:
>      > I just looked for it. The correct name appears to be SDRLive. But the
>      > URL still uses the old linuxsdr name.
>      > https://sourceforge.net/projects/linuxsdr/
>      >
>      > On Mon, Mar 16, 2020 at 11:04 PM Gregory Schippers <kc8hxo2@...
>     <mailto:kc8hxo2@...>
>      > <mailto:kc8hxo2@... <mailto:kc8hxo2@...>>> wrote:
>      >
>      >     Now renamed SDRLinux, the author has a new version. I can confirm
>      >     operation OOTB operation with my HF+ Discovery using GQRX, CubicSDR,
>      >     and SDR Angel, and that's with the live DVD!  quite impressed.
>      >     Greg, KC8HXO
>      >
>      >
>
>
>
>




WWVB 60 KHz Ferrite loop antenna part 3

Paul Cianciolo
 

Here is part 3 of the WWVB 60 Khz ferrite build loop series

https://youtu.be/3zNG7L7fQf4


W1VLF


Re: The YouLoop antenna is on sale #announcements

dave_bunyan
 

Thanks for comments "Prog"

My comment on "reduced noise compared to a log wire". On first testing my loop out in the garden it was - where did all those signals come from ??? "80m and 40m are alive!"  And as I've already said excellent MW DX - best so far is good signals from S Korea and Tiwan at 900 km (5600 miles). And during to 2019 SpE season it gave much better results than 70 MHz dipole when receiving the Eastern European OIRT band (66-74 MHz). And it is really good on the Bnd - apart fom being wide angle bi-directional.

Pre-amp gain of about 20 dB is about right - I have to use a 10 dB attenuator to avoid putting too much signal into the SDR. But at around £6 inc. for a ready made board it was the simplest option.

David


Re: The YouLoop antenna is on sale #announcements

dave_bunyan
 

Re: what type of transformer material. I used Amidon BN73-202 PIG NOSE (binocular) transformer to wind a 1:1 balun this was the transformer mentioned in Everett Sharp's articles Got 10 for £5.95 on ebay, because it was all I could get. I tested 2:1 and 1:1 and found 1:1 best.


David 


Re: The YouLoop antenna is on sale #announcements

prog
 

Try a lower loss 1:1 transformer.


Re: The YouLoop antenna is on sale #announcements

Mike Bott
 
Edited

I'll try it out tonight for The Mighty KBC on 5960 at 00:00utc.  The unboxing pics can be found here: https://www.dropbox.com/sh/wutp55i1r66qutp/AABBfAodYelxrQ_vVQjEXs2ca?dl=0   Hope conditions are decent tonight.

I'll keep the above link active for the next week or so, 

--
Mike


On 3/20/20 12:39 PM, Curt Faulk wrote:
Mike:

Of course, many of us out here will be very interested in your early reports on how it performs.


Re: The YouLoop antenna is on sale #announcements

Mark Pettifor
 

Thinking of building my own, with some RG213 I have. I have a few of these transformers on hand, but I'm wondering if the loss is too high for this loop design (they are better I think for much larger loops, like outdoor superloop-type antennas):

https://www.minicircuits.com/pdfs/T16-6T-X65.pdf

Thoughts?

Best regards,
Mark Pettifor


Re: The YouLoop antenna is on sale #announcements

prog
 

Is it suitable for outdoor installation?
It's basically about waterproofing the SMA connectors. Waterproofing tape should be enough for permanent outdoors installation.

Is it rigid enough to hold it's shape symmetrically, or would you suggest taping it to a suitably sized plastic hula hoop (65 cm would do it).
Yes, it's rigid enough.

Would you consider offering an option for a larger loop?
Why not? I can replace the two 1m legs with 2m ones.

with a cheap 30dB preamp from ebay it works really well
Leif SM5BSZ demonstrated a nice video with this antenna about 3 years ago. One interesting aspect is the reduced response to wide band noise compared to a long wire antenna. A simple FET preamp can help the reception dramatically when the loop is used with "standard" HF receivers with high NF. The preamp he built has about 20 dB of gain.
Check this video : https://www.youtube.com/watch?v=MNfc09SwwX8


Re: inmarsat EGC data via Airspy R2

michael.heinemann.fehmarn@...
 

Moin, irgendwie kommen meine mails an dich immer zurück.

magst du mich nochmal kontakten? (offlist)

Dann eventuell Phone.

M.

Am 12.03.2020 um 09:06 schrieb fly.fechter@...:

Hallo,
I currently receive via JAERO and SDRsharp the inmarsat AERO data. 
Is it possible-adviseable to add another SDRsharp onto my notebook, running via this second SDRsharp
the EGC data processed by the Tekmanoid professional inmarsat decoder ?
Do I have to install this second SDRsharp in a different separate folder to avoid any data confusion ?
I do NOT intend to run both SDRsharps at the same time - I Just to be able to get AERO some time, stop this  and then activate my second SDRsharp installation for the EGC data.
Thanks in advance for your kind help.
Regards,
Roland    


Re: The YouLoop antenna is on sale #announcements

dave_bunyan
 

A couple of questions - which could be answered on your presentation page. Is it suitable for outdoor installation? Is it rigid enough to hold it's shape symmetrically, or would you suggest taping it to a suitably sized plastic hula hoop (65 cm would do it). Would you consider offering an option for a larger loop?

For info: I've built a 1.2 m diameter loop based on the george smart article. It's not the mobius version of his design, but with a cheap 30dB preamp from ebay it works really well. After a life-time of wanting to received North American MW stations and never succeeding in a noisy urban environment I can now get VOCM 590, WOR 710, WBBR 1130 on a regular basis. Not usually at good strengths but amazing for a small antenna. So I'd love to try a mobius version and you done all the hard work with the balun and phasing unit.


Re: Live Linux distro #airspydiscovery

jdow
 

What do you see when you plug the disk in with another OS install up and running? If you see a lot of files it probably should work. If you see one file with a name that is the same as the file you burned you did it wrong. Study how to burn an ISO image with the tool you have available. Ask google.
{^_^}

On 20200320 10:57:21, michaeld wrote:
Yes, I had the same issue, says it is not a bootable ISO.
On Fri, Mar 20, 2020 at 8:04 AM Kai <needconnection@... <mailto:needconnection@...>> wrote:
I was looking forward to using this on an older laptop with no HDD, but
I haven't had any luck burning the ISO yet.
Tried downloading with different browsers on different operating
systems, burning to different thumb drives and using different thumb
drive file types, with all the above I get an error that the process
can't be complete.
Anyone have similar problems?
On 17/03/2020 4:17 pm, Shirley Dulcey KE1L wrote:
> I just looked for it. The correct name appears to be SDRLive. But the
> URL still uses the old linuxsdr name.
> https://sourceforge.net/projects/linuxsdr/
>
> On Mon, Mar 16, 2020 at 11:04 PM Gregory Schippers <kc8hxo2@...
<mailto:kc8hxo2@...>
> <mailto:kc8hxo2@... <mailto:kc8hxo2@...>>> wrote:
>
>     Now renamed SDRLinux, the author has a new version. I can confirm
>     operation OOTB operation with my HF+ Discovery using GQRX, CubicSDR,
>     and SDR Angel, and that's with the live DVD!  quite impressed.
>     Greg, KC8HXO
>
>


Re: The YouLoop antenna is on sale #announcements

dave_bunyan
 

If you can manage a little bit of home construction the 30dB LNA boards on ebay that go for a few dollars work extremely well with a 1.2 m magnetic shielded loop I built a couple of years ago. I just added a 470uH (or 1 mH) axial choke between the rf out and +Vcc for line powering. The board to go for is the one with the round LNA chip. It's worth a go - it should be well under $10. Of course you have to have something to send 12 volts up the coax. I had a 12v/1A linear wall wart so built a really simple DC injector as 'googled'.