Date   

Re: A new way to shut off a PC

michel soldevila
 

Yep, Simon, HardwareMonitor is already installed. No temperature problem reported.
I refined the tests:
- running SDR Console without any SDR connected: OK
- connecting the SDR to the PC: OK
- starting SDR Console: crash !
I strongly suspect the PSU, like Dennis. I will therefore do the test recommended by Allan: unplug the graphics card to reduce the load on the power supply.
A suivre !
Michel, F1GOC


Re: 137MHz "V" Antenna advice needed ...

David Slipper
 

That makes sense ... many thanks.

I have a box full of 750mm telescopic aerials so this was a very cheap starting point ;-)

Dave


On 22/12/2021 13:50, D R via groups.io wrote:

A lot of Daves on here giving advice!

The reflectors on the illustrated V antenna are simply forming a ground plane, and they should NOT be connected to the feedline.  Ideally, they should be connected to each other where they cross, or at least make each pair of opposites from a single length of wire/rod/tube.  Some experimentation with the distance between the V and the ground plane may be necessary, as this will affect the sensitivity at low elevations (with a standard turnstile antenna the best spacing is around 3/8 wavelength, but it may be different with a V).

As David Taylor says, a QFH antenna is the preferred modern antenna for WxSat reception, but if you are just starting out the V will be a lot simpler to make, and you can trade up later.  Have fun!

Regards,
Dave


Re: 137MHz "V" Antenna advice needed ...

D R
 

A lot of Daves on here giving advice!

The reflectors on the illustrated V antenna are simply forming a ground plane, and they should NOT be connected to the feedline.  Ideally, they should be connected to each other where they cross, or at least make each pair of opposites from a single length of wire/rod/tube.  Some experimentation with the distance between the V and the ground plane may be necessary, as this will affect the sensitivity at low elevations (with a standard turnstile antenna the best spacing is around 3/8 wavelength, but it may be different with a V).

As David Taylor says, a QFH antenna is the preferred modern antenna for WxSat reception, but if you are just starting out the V will be a lot simpler to make, and you can trade up later.  Have fun!

Regards,
Dave


Re: 137MHz "V" Antenna advice needed ...

Larry Horlick
 

That only works in a Holiday Inn Express. A regular Holiday Inn won't do it...

Larry

On Wed, Dec 22, 2021 at 12:14 AM Kriss Kliegle KA1GJU <kliegle@...> wrote:
Connected... Yes
Grounded... Yes (coax shield)

Satellites reception

But I'm currently in a Hilton, not a Holiday Inn... so I am not a rocket scientist yet, but maybe on the next trip?


73 Kriss KA1GJU/AM


Re: 137MHz "V" Antenna advice needed ...

David J Taylor
 

On 22/12/2021 03:04, David Slipper wrote:
It's NOT a Yagi - this picture (see HERE
<https://www.amsat.se/wordpress/wp-content/uploads/2020/06/V-dipole_ritning.jpg>)
is similar to what I am building but for 137MHz (the one in the pic is for a
higher frequency).

The two dipole elements are horizontal and 120 degrees apart.

Do the reflector elements need to be connected together??

Do they need grounding ?? or connecting to the feed in some way ??

Dave
Dave,

If you are going to build something the QFH antenna would be a better choice
for APT/LRPT 137 MHz reception, for example:

https://www.satsignal.eu/wxsat/equipment.htm

but search for more recent links.

David
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv


Re: A new way to shut off a PC

Simon Brown
 

FWIW: https://openhardwaremonitor.org/ is a great program for tracking temperature.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of jdow
Sent: 22 December 2021 02:01
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] A new way to shut off a PC

 

So what is the CPU temperature.
{^_^}

On 20211221 07:06:49, michel soldevila wrote:

The disks are in good conditions according to CrystalDiskInfo. The resync only happens when the PC suffers an unexpected shutdown. As pointed out by Allan, this is normal opération.

Come to think of it, this problem arose quite recently (before switching from Windows 7 to  Windows 10) and has evolved rapidly. Initially, the PC did not stop with each launch of SDR Console, as is the case today.
This could favor the thermal failure hypothesis. However, Speccy returns normal temperatures: 40 ° C for the discs, 58°C for the graphic card,  25°C inside the PC box.

Fortunately, I have my laptop to continue listening to shortwave while investigating this issue!
Michel, F1GOC

 


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: 137MHz "V" Antenna advice needed ...

Kriss Kliegle KA1GJU
 

Connected... Yes
Grounded... Yes (coax shield)

Satellites reception

But I'm currently in a Hilton, not a Holiday Inn... so I am not a rocket scientist yet, but maybe on the next trip?


73 Kriss KA1GJU/AM


Re: 137MHz "V" Antenna advice needed ...

Michael Durkin
 

DiskCone is what I see ... 


On Tue, Dec 21, 2021, 7:04 PM David Slipper <softfoot@...> wrote:

It's NOT a Yagi - this picture (see HERE)  is similar to what I am building but for 137MHz (the one in the pic is for a higher frequency).

The two dipole elements are horizontal and 120 degrees apart.

Do the reflector elements need to be connected together??

Do they need grounding ?? or connecting to the feed in some way ??

Dave



On 21/12/2021 23:30, Kriss Kliegle KA1GJU wrote:

Slightly confused... any images of said 8 element horizontal V dipole?
With that said...
A beam (Yagi) with 8 elements will be highly directional, not something you want when chasing a satellite that is moving across the sky... unless you plan on using an azimuth/elevation rotator (more complexity).
I know one satellite operator in the club uses the 'egg beater' type antennas, they're omnidirectional  and no there are no moving parts to fail.

Typically in a beam antenna, the elements are +/- 1/2 wave long (two +/- 1/4 wave elements connected together to form one +/- 1/2 wavelength long element). Since the center of each parasitic element (essentially a dipole) is at 0 volts, the element is usually clamped to a metal boom without being insulated.
Lots of info on the web to get dimensions of each element and the spacing (google "VHF beam antenna dimensions" or similar)

i.e: https://www.rfwireless-world.com/calculators/3-element-Yagi-Antenna-Calculator.html
Yagi Antenna calculator Formula
Yagi beam antennas are great for narrowing the 'field of view' of RF, but once not aimed within the beam width, the RX'ed signal can drop off dramatically.
Antenna specs of commercially available antennas will state what the half-power beam width is. For example a -3dB drop or half power drop from the main lobe:

Antenna Beamwidth

The more elements added, the more forward gain (better front to back ratio)... at a cost of a more narrow beam width. Of course there are lots of variables that can be tweaked, height above ground, element spacing, element lengths, etc to change the specs of a beam.

Confused yet?

73 Kriss KA1GJU/AM


Re: 137MHz "V" Antenna advice needed ...

jdow
 

I am making educated guesses here.

Yes, connect them together to the shield of the feed line. I am not sure what you are trying to achieve here, though.

{^_^}

On 20211221 19:04:08, David Slipper wrote:

It's NOT a Yagi - this picture (see HERE)  is similar to what I am building but for 137MHz (the one in the pic is for a higher frequency).

The two dipole elements are horizontal and 120 degrees apart.

Do the reflector elements need to be connected together??

Do they need grounding ?? or connecting to the feed in some way ??

Dave



On 21/12/2021 23:30, Kriss Kliegle KA1GJU wrote:

Slightly confused... any images of said 8 element horizontal V dipole?
With that said...
A beam (Yagi) with 8 elements will be highly directional, not something you want when chasing a satellite that is moving across the sky... unless you plan on using an azimuth/elevation rotator (more complexity).
I know one satellite operator in the club uses the 'egg beater' type antennas, they're omnidirectional  and no there are no moving parts to fail.

Typically in a beam antenna, the elements are +/- 1/2 wave long (two +/- 1/4 wave elements connected together to form one +/- 1/2 wavelength long element). Since the center of each parasitic element (essentially a dipole) is at 0 volts, the element is usually clamped to a metal boom without being insulated.
Lots of info on the web to get dimensions of each element and the spacing (google "VHF beam antenna dimensions" or similar)

i.e: https://www.rfwireless-world.com/calculators/3-element-Yagi-Antenna-Calculator.html
Yagi Antenna calculator Formula
Yagi beam antennas are great for narrowing the 'field of view' of RF, but once not aimed within the beam width, the RX'ed signal can drop off dramatically.
Antenna specs of commercially available antennas will state what the half-power beam width is. For example a -3dB drop or half power drop from the main lobe:

Antenna Beamwidth

The more elements added, the more forward gain (better front to back ratio)... at a cost of a more narrow beam width. Of course there are lots of variables that can be tweaked, height above ground, element spacing, element lengths, etc to change the specs of a beam.

Confused yet?

73 Kriss KA1GJU/AM


Re: 137MHz "V" Antenna advice needed ...

David Slipper
 

It's NOT a Yagi - this picture (see HERE)  is similar to what I am building but for 137MHz (the one in the pic is for a higher frequency).

The two dipole elements are horizontal and 120 degrees apart.

Do the reflector elements need to be connected together??

Do they need grounding ?? or connecting to the feed in some way ??

Dave



On 21/12/2021 23:30, Kriss Kliegle KA1GJU wrote:

Slightly confused... any images of said 8 element horizontal V dipole?
With that said...
A beam (Yagi) with 8 elements will be highly directional, not something you want when chasing a satellite that is moving across the sky... unless you plan on using an azimuth/elevation rotator (more complexity).
I know one satellite operator in the club uses the 'egg beater' type antennas, they're omnidirectional  and no there are no moving parts to fail.

Typically in a beam antenna, the elements are +/- 1/2 wave long (two +/- 1/4 wave elements connected together to form one +/- 1/2 wavelength long element). Since the center of each parasitic element (essentially a dipole) is at 0 volts, the element is usually clamped to a metal boom without being insulated.
Lots of info on the web to get dimensions of each element and the spacing (google "VHF beam antenna dimensions" or similar)

i.e: https://www.rfwireless-world.com/calculators/3-element-Yagi-Antenna-Calculator.html
Yagi Antenna calculator Formula
Yagi beam antennas are great for narrowing the 'field of view' of RF, but once not aimed within the beam width, the RX'ed signal can drop off dramatically.
Antenna specs of commercially available antennas will state what the half-power beam width is. For example a -3dB drop or half power drop from the main lobe:

Antenna Beamwidth

The more elements added, the more forward gain (better front to back ratio)... at a cost of a more narrow beam width. Of course there are lots of variables that can be tweaked, height above ground, element spacing, element lengths, etc to change the specs of a beam.

Confused yet?

73 Kriss KA1GJU/AM


Re: A new way to shut off a PC

jdow
 

So what is the CPU temperature.
{^_^}

On 20211221 07:06:49, michel soldevila wrote:

The disks are in good conditions according to CrystalDiskInfo. The resync only happens when the PC suffers an unexpected shutdown. As pointed out by Allan, this is normal opération.

Come to think of it, this problem arose quite recently (before switching from Windows 7 to  Windows 10) and has evolved rapidly. Initially, the PC did not stop with each launch of SDR Console, as is the case today.
This could favor the thermal failure hypothesis. However, Speccy returns normal temperatures: 40 ° C for the discs, 58°C for the graphic card,  25°C inside the PC box.
Fortunately, I have my laptop to continue listening to shortwave while investigating this issue!
Michel, F1GOC


Re: Reverse Spectrum

donaldhawbaker
 

You need to swap I and Q if possible.


Sent from Yahoo Mail for iPad

On Sunday, December 19, 2021, 9:12 AM, caeroslp <caeroslp@...> wrote:

Thanks for your fast answer. Now i feel a littlebit dumb, because i not reading the manual. 

Greetings

Simon Brown <simon@...> schrieb am So., 19. Dez. 2021, 15:03:

https://www.sdr-radio.com/external-radio#InvertedSpectrum

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of caeroslp
Sent: 19 December 2021 13:50
To: SDR-Radio@groups.io
Subject: [SDR-Radio] Reverse Spectrum

 

Hey Guys,

 

Today I built a panadapter for my FT-100D. It works nice with SDR-Console and the External Radio is a perfect feature for this. I have only one Problem:

 

I dont know why, but the spectrum is not right located. I mean the upper frequencies are at the lower end. 

 

Is there a function to reverse spectrum? It would helps me a lot.

 

73 de Dominik DL1DJH 

 

PS: Merry christmas to you all.


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: A new way to shut off a PC

Allan Isaacs
 

Just a quick suggestion Michel.

If your motherboard has built-in graphics pull your graphics card and use the motherboard output.

That will reduce the peak power demand and prove whether the PSU is suspect.

 

My system is much the same as yours except two hardware mirrored SSDs for system and two software mirrored 2T data disks.

Because my new display is 4K and my graphics card is only 1920 I unplugged the card and now use my motherboard graphics which can run my 4K monitor.

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of michel soldevila
Sent: 21 December 2021 16:45
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] A new way to shut off a PC

 

I have 3 disks in my PC : one 500 GB SSD for the system, and two 3 TB HDD for the data (mostly pictures RAW files). All are monitored by CrystalDiskInfo, which does not report any problem.
Again, Speccy returns normal operating temperatures: 40 ° C for the discs, 58°C for the graphic card,  25°C inside the PC box. Dust has been removed, all 3 fans checked (main fan, CPU fan, graphic processor fan). 
I will open the PC again to add thermal paste on the CPU.

@G3PIY : Windows 10 was installed on the SSD after formating it. All other programs were installed after.
Michel, F1GOC

 


Re: 137MHz "V" Antenna advice needed ...

Kriss Kliegle KA1GJU
 

Slightly confused... any images of said 8 element horizontal V dipole?
With that said...
A beam (Yagi) with 8 elements will be highly directional, not something you want when chasing a satellite that is moving across the sky... unless you plan on using an azimuth/elevation rotator (more complexity).
I know one satellite operator in the club uses the 'egg beater' type antennas, they're omnidirectional  and no there are no moving parts to fail.

Typically in a beam antenna, the elements are +/- 1/2 wave long (two +/- 1/4 wave elements connected together to form one +/- 1/2 wavelength long element). Since the center of each parasitic element (essentially a dipole) is at 0 volts, the element is usually clamped to a metal boom without being insulated.
Lots of info on the web to get dimensions of each element and the spacing (google "VHF beam antenna dimensions" or similar)

i.e: https://www.rfwireless-world.com/calculators/3-element-Yagi-Antenna-Calculator.html
Yagi Antenna calculator Formula
Yagi beam antennas are great for narrowing the 'field of view' of RF, but once not aimed within the beam width, the RX'ed signal can drop off dramatically.
Antenna specs of commercially available antennas will state what the half-power beam width is. For example a -3dB drop or half power drop from the main lobe:

Antenna Beamwidth

The more elements added, the more forward gain (better front to back ratio)... at a cost of a more narrow beam width. Of course there are lots of variables that can be tweaked, height above ground, element spacing, element lengths, etc to change the specs of a beam.

Confused yet?

73 Kriss KA1GJU/AM


137MHz "V" Antenna advice needed ...

David Slipper
 

Hi, I am in the process of making a "horizontal 'V' dipole" antenna for receiving NOAA and have a question about adding a reflector.

It will have 8 elements in the reflector and my questions are :-

1. Do the 8 elements need to be connected to each other ???

2. Does the reflector need to be grounded ??? or perhaps connected to the coax braid in some way ???

I'm a newbie in all this so any advice is welcome.

Regards,
Dave


Re: A new way to shut off a PC

Robin Francis
 

That is exactly what was happening to me  6 months ago. A new uprated PSU fixed it.

Robin ZL1RNF

 

Sent from Mail for Windows

 


Re: A new way to shut off a PC

Dennis Matzen
 

I would also suspect the power supply. It could be that when you start SDR Console the increased load on the power supply (both for the USB attached SDR as well as the graphics card) is causing the power supply to kick off. It may be rated high enough to support the system but with age it may not be able to deliver that load any more. This would explain why there are no logs indicating why it shutdown. The system just stops before any logs can be written to. But you should see in the event log an entry that the system had an unexpected shutdown. Same thing is if the power cable was pulled.
--
Dennis
KA6FUB


Re: A new way to shut off a PC

michel soldevila
 

I have 3 disks in my PC : one 500 GB SSD for the system, and two 3 TB HDD for the data (mostly pictures RAW files). All are monitored by CrystalDiskInfo, which does not report any problem.
Again, Speccy returns normal operating temperatures: 40 ° C for the discs, 58°C for the graphic card,  25°C inside the PC box. Dust has been removed, all 3 fans checked (main fan, CPU fan, graphic processor fan). 
I will open the PC again to add thermal paste on the CPU.

@G3PIY : Windows 10 was installed on the SSD after formating it. All other programs were installed after.
Michel, F1GOC


Re: A new way to shut off a PC

Allan Isaacs
 

Same here Nick.

I had lots of intermittent problems lately and found disk errors marked in the system logs corresponding timewise to the problems.

The pair of 525GB SSDs in RAID carried on regardless being quite resilient.

I bought a pair of 1TB SSDs onto which I cloned the old drives and touch wood no problems since.

 

Any graphics card using a fan should be detached regularly and the fan bearing oiled as they can run slow due to a build up of dust.

Peel back the centre sticker and lubricate the end of the spindle.

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Nick Arend via groups.io
Sent: 21 December 2021 14:40
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] A new way to shut off a PC

 

Definitely check the SMART info for your disks: https://www.howtogeek.com/134735/how-to-see-if-your-hard-drive-is-dying/

It wouldn't hurt. I had a failing drive one time and it manifested all sorts of strange and seemingly unrelated problems. One was that it would crash an Nvidia driver every time I did anything GPU intensive. Once I discovered the bad drive and unplugged it, I no longer had problems.

_._,_._,_

 


Re: A new way to shut off a PC

Nick Arend
 

Definitely check the SMART info for your disks: https://www.howtogeek.com/134735/how-to-see-if-your-hard-drive-is-dying/

It wouldn't hurt. I had a failing drive one time and it manifested all sorts of strange and seemingly unrelated problems. One was that it would crash an Nvidia driver every time I did anything GPU intensive. Once I discovered the bad drive and unplugged it, I no longer had problems.

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