1. airspy@groups.io
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Re: Equidistant spikes on trace on FFT - is it the server computer

airspy@...
 


Nice Googling! - I must check how much current my Mini takes (I've got a usb in circuit ammeter somewhere). Not that I have that big a noise issue.  Even so, a low cost Airspy approved unit would make a nice add-on!
Dave
Re: Equidistant spikes on trace on FFT - is it the server computer

Marco Salcedo
 


Dave:
 
Please have  a look to thos links:
 
 
 
 
 
 
 
 
Just my 2 cents.
 

Best regards,
Marco-Luis, YV1HX.

----- Original Message -----
From: airspy@...
Sent: Sunday, November 05, 2017 2:35 PM
Subject: Re: [airspy] Equidistant spikes on trace on FFT - is it the server computer

and a lottery win lol

is there such a thing as an opto isolated usb cable? (obviously with power supplied to other end as well somehow). If not it's time someone made one.
Dave GW4GTE

Re: Equidistant spikes on trace on FFT - is it the server computer

airspy@...
 

and a lottery win lol

is there such a thing as an opto isolated usb cable? (obviously with power supplied to other end as well somehow). If not it's time someone made one.
Dave GW4GTE
Re: Equidistant spikes on trace on FFT - is it the server computer

prog
 

On Sun, Nov 5, 2017 at 10:09 am, <airspy@...> wrote:
Prove it's a switch mode noise by deliberately loading the mains say with a kettle / electric fire etc. which will drop the volts. That's usually  enough for the smpsu to alter frequency or amount of 'bite'. Watch the screen to confirm.

Prove if it's the monitor by tuning into a spike then, er, unplug the monitor!

Try a different usb cable. Some are less well screened. Or try coiling as much up as poss and enclose it with your fist - see if level alters. 

Dave GW4GTE
How about a linear PSU?

http://www.teradak.com/products/55.html
Re: Equidistant spikes on trace on FFT - is it the server computer

airspy@...
 

Prove it's a switch mode noise by deliberately loading the mains say with a kettle / electric fire etc. which will drop the volts. That's usually  enough for the smpsu to alter frequency or amount of 'bite'. Watch the screen to confirm.

Prove if it's the monitor by tuning into a spike then, er, unplug the monitor!

Try a different usb cable. Some are less well screened. Or try coiling as much up as poss and enclose it with your fist - see if level alters. 

Dave GW4GTE
Re: Remote SDR for MW DXing

jdow
 

OK - I suspect your local power company has a department dedicated to keeping FCC complaints down. You may have to do some drilling or get help from other hams in the area who've dealt with noise. It's a little difficult for you to go out and bang on power poles you suspect with a big hammer. But, the FCC does have some regulations about this kind of noise. So finding the right power company department should result in some considerable reduction. Just be aware that switching from a dummy load to a real antenna will still provide a surprising and dismaying increase in noise. It's natural noise that can't go away.

{^_^} Joanne

On 2017-11-05 09:58, Eric Oyen wrote:
ok, here is my definition of theoretical minimum noise floor:
the noise floor that results from plugging a high quality receiver into a terminated load (a shielded 50 ohm load for unbalanced systems or a shielded resistive load of 300 ohms (or higher) for balanced systems. This way, you can sample the receiver noise and remove it's content from the resultant output.
btw, on an ordinary SW receiver (in my case, a grundig globetrotter G300), I get nothing but powerline buzz on all frequencies below 14 Mhz except during very good propagation conditions. it's a loud rasping buzz that gets stronger the lower in frequency I go. there are areas within the AM broadcast band where it is so strong that it even interferes with local very strong signals (620 KTAR is less than 4 miles from me running 50Kw during the day and that buzz even makes a hash of their signal). The buzz/hash is so intrusive that I can only hear it on all frequencies below 500 Khz.
I do not have a shielded loop here to screen out the problems. until I do, it's going to be a real trick to hear anything.
lastly, I seem to be having trouble getting the program to even acknowledge that the RTL/SDR device is plugged in. Windows 7 sees it, but SDR# says the device is either not plugged in or not installed. I may have to take the machine and the RTl/SDR devices over to a sighted ham who can help me out.
DE n7zzt Eric
On Nov 5, 2017, at 7:06 AM, jdow wrote:

Um, define what you mean by "theoretical minimum noise floor", please. The quiet areas on the Earth typically have noise levels that tend to be quite high. Atmospheric noise shows a minimum at 1.5 MHz, a peak at about 5 MHz, and drops rapidly thereafter. However, the man made noise at a quiet receiving site tends to be 45 dB to 60 dB above kTB noise at 2 MHz and 500 kHz respectively. City noise in a business area is about 45 dB higher. So you could probably gain that 45 dB back. But the rest of it is probably what anybody is stuck with at MW.

That said if you are near really high voltage power lines in a damp area the noise can, indeed, be very much higher. Even 12.6 kV has arcing problems near the ocean. In aggressively dry (most of the year) Phoenix that should not be so much a a problem. Neighbors with Plasma TVs might be worse as much power line internet tools or DSL. 70 dB above a quiet area bothers me as a concept. Antenna designs that are less susceptible to static electricity generation from breezes or winds should be explored. A good small loop antenna might worthwhile experimenting with. (And it's a shame it's socially frowned upon to use .50 caliber weapons on noisy automobiles on the roads near you.)

{^_^} Joanne

On 2017-11-04 21:44, Eric Oyen wrote:
well, depending on weather conditions, you can probably use a raspberry pie with the appropriate packages installed to act as the remote. I would recommend using ethernet cable and a 120 volt power line inside some weather shielded conduit. the enclosure can be one of several types available from Home Depot.
This setup will allow you to have the SDR right at the antenna and if the enclosure is properly shielded, you won't incur any additional noise in the antenna. you could probably get away with burying the conduit only a few inches under the turf.
I'll tell you what, I wish I had an RF quiet plot near me. I live right here in west phoenix and we have 12.6 KV overhead lines with 220 v drops to each house. HF around here is pretty noisy (at times more than 70 db above theoretical minimum noise floor. on MW, its bad and on LF (below 500 Khz, its ridiculous. what further doesn't help my situation, is the 3 grow operations located within 500 feet of me. their grow lights pretty much wipe out everything up to the 20 meter band.
anyway, I hope some of my suggestions are usable.
DE n7zzt Eric
a totally blind ham and member of the Technomage Guild
On Nov 4, 2017, at 9:12 PM, Les Rayburn wrote:
Like many DX’ers I live in a subdivision, and the noise levels make MW DXing difficult to impossible. I have a vacant plot of undeveloped wetlands adjacent to my home that is “RF Quiet” at least compared to the rest of the area. I’ve located three different receiving antennas in this area, but then have to struggle with burying coax, putting chokes on both ends, etc..etc.

Lately I’ve been wondering about the possibility of putting an SDR receiver directly at the antenna in this area-in a weatherproof enclosure, and accessing that SDR remotely.

This area is within range of my wireless N router, and it would also be possible to run ethernet cable.

Has anyone else tried something like this? Are there guides available online to help guide someone though the process?
Any help would be gratefully accepted.


73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.

Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-1 Pro, Sony XDR-F1HD, Dennon TU-1500RD, Sangean HDT-1, Ray Dees RDS Decoders,
Korner 9.2 Antenna, FM-6 Antenna, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip.

“Nothing but blues and Elvis, and somebody else’s favorite song…”
Re: Remote SDR for MW DXing

Eric Oyen <eric.oyen@...>
 

ok, here is my definition of theoretical minimum noise floor:
the noise floor that results from plugging a high quality receiver into a terminated load (a shielded 50 ohm load for unbalanced systems or a shielded resistive load of 300 ohms (or higher) for balanced systems. This way, you can sample the receiver noise and remove it's content from the resultant output.

btw, on an ordinary SW receiver (in my case, a grundig globetrotter G300), I get nothing but powerline buzz on all frequencies below 14 Mhz except during very good propagation conditions. it's a loud rasping buzz that gets stronger the lower in frequency I go. there are areas within the AM broadcast band where it is so strong that it even interferes with local very strong signals (620 KTAR is less than 4 miles from me running 50Kw during the day and that buzz even makes a hash of their signal). The buzz/hash is so intrusive that I can only hear it on all frequencies below 500 Khz.

I do not have a shielded loop here to screen out the problems. until I do, it's going to be a real trick to hear anything.

lastly, I seem to be having trouble getting the program to even acknowledge that the RTL/SDR device is plugged in. Windows 7 sees it, but SDR# says the device is either not plugged in or not installed. I may have to take the machine and the RTl/SDR devices over to a sighted ham who can help me out.

DE n7zzt Eric

On Nov 5, 2017, at 7:06 AM, jdow wrote:

Um, define what you mean by "theoretical minimum noise floor", please. The quiet areas on the Earth typically have noise levels that tend to be quite high. Atmospheric noise shows a minimum at 1.5 MHz, a peak at about 5 MHz, and drops rapidly thereafter. However, the man made noise at a quiet receiving site tends to be 45 dB to 60 dB above kTB noise at 2 MHz and 500 kHz respectively. City noise in a business area is about 45 dB higher. So you could probably gain that 45 dB back. But the rest of it is probably what anybody is stuck with at MW.

That said if you are near really high voltage power lines in a damp area the noise can, indeed, be very much higher. Even 12.6 kV has arcing problems near the ocean. In aggressively dry (most of the year) Phoenix that should not be so much a a problem. Neighbors with Plasma TVs might be worse as much power line internet tools or DSL. 70 dB above a quiet area bothers me as a concept. Antenna designs that are less susceptible to static electricity generation from breezes or winds should be explored. A good small loop antenna might worthwhile experimenting with. (And it's a shame it's socially frowned upon to use .50 caliber weapons on noisy automobiles on the roads near you.)

{^_^} Joanne

On 2017-11-04 21:44, Eric Oyen wrote:
well, depending on weather conditions, you can probably use a raspberry pie with the appropriate packages installed to act as the remote. I would recommend using ethernet cable and a 120 volt power line inside some weather shielded conduit. the enclosure can be one of several types available from Home Depot.
This setup will allow you to have the SDR right at the antenna and if the enclosure is properly shielded, you won't incur any additional noise in the antenna. you could probably get away with burying the conduit only a few inches under the turf.
I'll tell you what, I wish I had an RF quiet plot near me. I live right here in west phoenix and we have 12.6 KV overhead lines with 220 v drops to each house. HF around here is pretty noisy (at times more than 70 db above theoretical minimum noise floor. on MW, its bad and on LF (below 500 Khz, its ridiculous. what further doesn't help my situation, is the 3 grow operations located within 500 feet of me. their grow lights pretty much wipe out everything up to the 20 meter band.
anyway, I hope some of my suggestions are usable.
DE n7zzt Eric
a totally blind ham and member of the Technomage Guild
On Nov 4, 2017, at 9:12 PM, Les Rayburn wrote:
Like many DX’ers I live in a subdivision, and the noise levels make MW DXing difficult to impossible. I have a vacant plot of undeveloped wetlands adjacent to my home that is “RF Quiet” at least compared to the rest of the area. I’ve located three different receiving antennas in this area, but then have to struggle with burying coax, putting chokes on both ends, etc..etc.

Lately I’ve been wondering about the possibility of putting an SDR receiver directly at the antenna in this area-in a weatherproof enclosure, and accessing that SDR remotely.

This area is within range of my wireless N router, and it would also be possible to run ethernet cable.

Has anyone else tried something like this? Are there guides available online to help guide someone though the process?
Any help would be gratefully accepted.


73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.

Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-1 Pro, Sony XDR-F1HD, Dennon TU-1500RD, Sangean HDT-1, Ray Dees RDS Decoders,
Korner 9.2 Antenna, FM-6 Antenna, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip.

“Nothing but blues and Elvis, and somebody else’s favorite song…”
Re: Equidistant spikes on trace on FFT - is it the server computer

jdow
 

A silly thing to do is temporarily reduce the screen resolution. If the spacing changes add ferrites to the video lines. I had to do that here. But, then, I have fairly long video lines. The computer is in the next room where it's noise is not bothersome.

{^_^}

On 2017-11-05 09:39, David Eckhardt wrote:
Try changing the FFT sample rate.  I strongly suspect the PC.  Also, try changing the displayed frequency span.  Try changing anything that is calculationally intensive as likely the PC is at fault as nothing changes with/without antenna.
Also, I do not have the newest AirSpy, but the antenna and USB connector should be commoned with the case at the point of penetration through the case and not just through the PC card inside.  Without this, the unit can and will pick up all kinds of RF noise in the environment (violated Faraday Cage).  The AirSpy 001's were built such that only the PC card returned the RF common to the case. I modified mine (gotta get inside and scrape paint) to get rid of PC-generated RF noise.  I am not aware how the present versions are constructed in this respect, since I don't have one.
Dave - WØLEV
<https://www.avast.com/sig-email?utm_medium=email&;utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&;utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
On Sun, Nov 5, 2017 at 10:29 AM, prog <info@sdrsharp.com <mailto:info@sdrsharp.com>> wrote:
On Sun, Nov 5, 2017 at 09:14 am, John wrote:
Advice please folks...
Server: sdr://tumbril.asuscomm.com:5555/
<http://tumbril.asuscomm.com:5555/>  (Atlantic coast - Isle of Luing).
Seems to be a low level spike every approx. 127khz.
A good (bad) place to see it is around 10mhz.
If I can see it then I presume everyone else can.
Everything off in shack including lcd screen - makes no difference.
*Didn't occur before using an old Dell OptiPlex 390 as server.*
I presume this is the cause.
No difference when antenna unplugged from airspy.
Am I correct in my assumption? If so, is there a fix?
(I have put several ferrite cores on the USB lead between Airspy and
computer - no better.
Does not seem to interfere with reception but is wicked and must be
banished if at all possible.
Thanks in advance,
John
Make sure the PC doesn't radiate its noise to the antenna. Maybe change the
orientation of the antenna, or put more ferrites on the coax instead of the
USB cable.
--
*Dave - WØLEV
*
*/Just Let Darwin Work/*
Re: Equidistant spikes on trace on FFT - is it the server computer

David Eckhardt
 

Try changing the FFT sample rate.  I strongly suspect the PC.  Also, try changing the displayed frequency span.  Try changing anything that is calculationally intensive as likely the PC is at fault as nothing changes with/without antenna. 

Also, I do not have the newest AirSpy, but the antenna and USB connector should be commoned with the case at the point of penetration through the case and not just through the PC card inside.  Without this, the unit can and will pick up all kinds of RF noise in the environment (violated Faraday Cage).  The AirSpy 001's were built such that only the PC card returned the RF common to the case.  I modified mine (gotta get inside and scrape paint) to get rid of PC-generated RF noise.  I am not aware how the present versions are constructed in this respect, since I don't have one. 

Dave - WØLEV  

Virus-free. www.avast.com

On Sun, Nov 5, 2017 at 10:29 AM, prog <info@...> wrote:
On Sun, Nov 5, 2017 at 09:14 am, John wrote:
Advice please folks...

Server: sdr://tumbril.asuscomm.com:5555/  (Atlantic coast - Isle of Luing).

Seems to be a low level spike every approx. 127khz.
A good (bad) place to see it is around 10mhz.
If I can see it then I presume everyone else can.
Everything off in shack including lcd screen - makes no difference.
Didn't occur before using an old Dell OptiPlex 390 as server.
I presume this is the cause.
No difference when antenna unplugged from airspy.
Am I correct in my assumption? If so, is there a fix?
(I have put several ferrite cores on the USB lead between Airspy and computer - no better.
Does not seem to interfere with reception but is wicked and must be banished if at all possible.
Thanks in advance,
John
 Make sure the PC doesn't radiate its noise to the antenna. Maybe change the orientation of the antenna, or put more ferrites on the coax instead of the USB cable.




--
Dave - WØLEV
Just Let Darwin Work
Re: Equidistant spikes on trace on FFT - is it the server computer

prog
 

On Sun, Nov 5, 2017 at 09:14 am, John wrote:
Advice please folks...

Server: sdr://tumbril.asuscomm.com:5555/  (Atlantic coast - Isle of Luing).

Seems to be a low level spike every approx. 127khz.
A good (bad) place to see it is around 10mhz.
If I can see it then I presume everyone else can.
Everything off in shack including lcd screen - makes no difference.
Didn't occur before using an old Dell OptiPlex 390 as server.
I presume this is the cause.
No difference when antenna unplugged from airspy.
Am I correct in my assumption? If so, is there a fix?
(I have put several ferrite cores on the USB lead between Airspy and computer - no better.
Does not seem to interfere with reception but is wicked and must be banished if at all possible.
Thanks in advance,
John
Make sure the PC doesn't radiate its noise to the antenna. Maybe change the orientation of the antenna, or put more ferrites on the coax instead of the USB cable.
Equidistant spikes on trace on FFT - is it the server computer

John
 

Advice please folks...

Server: sdr://tumbril.asuscomm.com:5555/  (Atlantic coast - Isle of Luing).

Seems to be a low level spike every approx. 127khz.
A good (bad) place to see it is around 10mhz.
If I can see it then I presume everyone else can.
Everything off in shack including lcd screen - makes no difference.
Didn't occur before using an old Dell OptiPlex 390 as server.
I presume this is the cause.
No difference when antenna unplugged from airspy.
Am I correct in my assumption? If so, is there a fix?
(I have put several ferrite cores on the USB lead between Airspy and computer - no better.
Does not seem to interfere with reception but is wicked and must be banished if at all possible.
Thanks in advance,
John
Re: Online - London SpyServer

prog
 

On Sun, Nov 5, 2017 at 05:04 am, Stephen Rapley wrote:
A note to let you know I'm enjoying tuning about the medium wave of London on a Sunday here in Sydney. Clear audio quality at 8 bit. 
 
Cheers,
Stephen
Thanks Stephen. It took an eternity to get right, but it's finally there!
Re: HF+ & Weather Sats

Jeff Kelly
 

TY!

Jeff
K2SDR

Sent from my iPhone

On Nov 5, 2017, at 10:35 AM, Simon Brown <simon@...> wrote:

Hi,

 

Here’s a link: http://www.sdr-satellites.com/Weather the answer is WxToImg.

 

 

From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of Jeff Kelly
Sent: 05 November 2017 12:53
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ & Weather Sats

 

Simon,

 

Are you decoding APT within your program or using WXTOIMG?

 

Jeff

 

 

Sent from my iPad


On Nov 5, 2017, at 5:40 AM, Simon Brown <simon@...> wrote:
Re: HF+ & Weather Sats

Simon Brown
 

Hi,

 

Here’s a link: http://www.sdr-satellites.com/Weather the answer is WxToImg.

 

 

From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of Jeff Kelly
Sent: 05 November 2017 12:53
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ & Weather Sats

 

Simon,

 

Are you decoding APT within your program or using WXTOIMG?

 

Jeff

 

 

Sent from my iPad


On Nov 5, 2017, at 5:40 AM, Simon Brown <simon@...> wrote:
Re: new spyserver in Central Italy #spyserver

andrea ottaviani
 

Ignacio, you're right. no band for upload. I can only do streaming for VHF - UHF NFM. This is the digital ADSL in some parts of Italy. It is now online. As soon as I have the fiber optics all will be ok. I've made some changes to the config hoping is ok. Now is on-line. Thank you

best 73 de IK0MMI
andrea
Re: Remote SDR for MW DXing

jdow
 

Um, define what you mean by "theoretical minimum noise floor", please. The quiet areas on the Earth typically have noise levels that tend to be quite high. Atmospheric noise shows a minimum at 1.5 MHz, a peak at about 5 MHz, and drops rapidly thereafter. However, the man made noise at a quiet receiving site tends to be 45 dB to 60 dB above kTB noise at 2 MHz and 500 kHz respectively. City noise in a business area is about 45 dB higher. So you could probably gain that 45 dB back. But the rest of it is probably what anybody is stuck with at MW.

That said if you are near really high voltage power lines in a damp area the noise can, indeed, be very much higher. Even 12.6 kV has arcing problems near the ocean. In aggressively dry (most of the year) Phoenix that should not be so much a a problem. Neighbors with Plasma TVs might be worse as much power line internet tools or DSL. 70 dB above a quiet area bothers me as a concept. Antenna designs that are less susceptible to static electricity generation from breezes or winds should be explored. A good small loop antenna might worthwhile experimenting with. (And it's a shame it's socially frowned upon to use .50 caliber weapons on noisy automobiles on the roads near you.)

{^_^} Joanne

On 2017-11-04 21:44, Eric Oyen wrote:
well, depending on weather conditions, you can probably use a raspberry pie with the appropriate packages installed to act as the remote. I would recommend using ethernet cable and a 120 volt power line inside some weather shielded conduit. the enclosure can be one of several types available from Home Depot.
This setup will allow you to have the SDR right at the antenna and if the enclosure is properly shielded, you won't incur any additional noise in the antenna. you could probably get away with burying the conduit only a few inches under the turf.
I'll tell you what, I wish I had an RF quiet plot near me. I live right here in west phoenix and we have 12.6 KV overhead lines with 220 v drops to each house. HF around here is pretty noisy (at times more than 70 db above theoretical minimum noise floor. on MW, its bad and on LF (below 500 Khz, its ridiculous.  what further doesn't help my situation, is the 3 grow operations located within 500 feet of me. their grow lights pretty much wipe out everything up to the 20 meter band.
anyway, I hope some of my suggestions are usable.
DE n7zzt Eric
a totally blind ham and member of the Technomage Guild
On Nov 4, 2017, at 9:12 PM, Les Rayburn wrote:

Like many DX’ers I live in a subdivision, and the noise levels make MW DXing difficult to impossible. I have a vacant plot of undeveloped wetlands adjacent to my home that is “RF Quiet” at least compared to the rest of the area. I’ve located three different receiving antennas in this area, but then have to struggle with burying coax, putting chokes on both ends, etc..etc.

Lately I’ve been wondering about the possibility of putting an SDR receiver directly at the antenna in this area-in a weatherproof enclosure, and accessing that SDR remotely.

This area is within range of my wireless N router, and it would also be possible to run ethernet cable.

Has anyone else tried something like this? Are there guides available online to help guide someone though the process?
Any help would be gratefully accepted.


73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.

Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-1 Pro, Sony XDR-F1HD, Dennon TU-1500RD, Sangean HDT-1, Ray Dees RDS Decoders,
Korner 9.2 Antenna, FM-6 Antenna, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip.

“Nothing but blues and Elvis, and somebody else’s favorite song…”
Re: Online - London SpyServer

Stephen Rapley
 

A note to let you know I'm enjoying tuning about the medium wave of London on a Sunday here in Sydney. Clear audio quality at 8 bit. 

Cheers,
Stephen

On 5 November 2017 at 14:20, schakz via Groups.Io <schakz@...> wrote:
Hello!!

Was able to connect from India and Listening to Hindi songs at 976. Amazing!!

Regards
Sagar


Re: HF+ & Weather Sats

Jeff Kelly
 

Simon,

Are you decoding APT within your program or using WXTOIMG?

Jeff



Sent from my iPad

On Nov 5, 2017, at 5:40 AM, Simon Brown <simon@...> wrote:
HF+ & Weather Sats

Simon Brown
 

Tease alert!

http://www.sdr-radio.com/Blog/PostId/15/airspy-hf-noaa-18

 

Simon Brown, G4ELI

 

www.dxgalaxy.com
www.sdr-radio.com
www.sdr-satellites.com

 

 
Re: Remote SDR for MW DXing

Bjarne Mjelde <bjarne.mjelde@...>
 

The KiwiSDR is a linear receiver, and I'm quite confident that Les is looking for a setup where it's possible to both listen live and record IQ files for later analysis. You would need Airspy/Elad/Perseus/CloudIQ/etc for that.
--
Bjarne Mjelde
World's Northernmost DX-er
arcticdx.blogspot.com
Arctic web-rx:  kongsdr.proxy.kiwisdr.com:8073
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