Date   

Re: Audio issue on SDR Console

Simon Brown
 

Ken,

 

How about increasing the audio buffering? A console screenshot would help as well, without this I’m flying blind.

 

 

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Sejkora
Sent: 13 January 2022 22:02
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Audio issue on SDR Console

 

Hello all,

 

I’m perplexed.  Ever since updating Windows-10 (latest feature update) about 10-days ago, I’ve been hearing some intermittent “pops” and “cracks” on the audio stream from SDRC connected to an Airspy Discovery HF+.   When listening, it’s not troublesome, and only slightly noticeable, but it is there.  Platform is Win-10, X64, 32 GB RAM, 4200 MHz Intel processor.  Although not a huge issue with casual listening, it is causing problems with decoding various digital modes.  The attached image shows a WEFAX (weather FAX) session with MultiPSK from a US Coast Guard transmitter about 10-miles away.  The upper slice of the FAX image shows the reception with SDRC, and the lower half show MultiPSK processing the audio from SDRSharp.  Running the audio through WEFAX mode on a parallel session of  fldigi yields similar results when comparing SDRC with SDRSharp.  I confirmed the volume setting, filter settings, audio buffer settings, CPU usage, etc. within SDRC, and nothing seems to be amiss.

 

I also have SDR++ and HDSDR on my PC, and they produce similar successful decodes  to SDRSharp.  Audio levels, mode (USB, 2.6 kHz), and filter settings are all the same across all four SDR software packages.  Considering the physical SDR connections (antenna, USB cable) were not changed between software swaps, I don’t think it’s any kind of RF or AF overload issue. I even tried an SDRPlay RSP1 with all four programs, and get identical results, that is – successful decodes with SDRSharp, HDSRR, and SDR++, but illegible FAX with SDRC.  I’ve tried reinstalling the latest beta version of SDRC, as well as the last stable version, but neither version makes any difference.  Again, SDRSharp, HDSDR, and SDR++ all produce successful decodes with both the Airspy Discovery HF+ and  SDRPlay RSP1.

 

I’ve also tried uninstalling and reinstalling my hardware audio drivers and virtual audio cables (VB-Audio Voicemeeter), and shut down the computer and swapped the Airspy Discovery HF+ to a different USB port, but nothing resolves the noise issue within SDRC.

 

Considering that the current configuration of hardware audio driver, virtual audio cable, etc. still work with SDRSharp, HDSDR, and SDR++, I have to ‘conclude’ the problem being an issue with SDRC.  I had been using SDRC successfully with fldigi and MultiPSK a few months ago, well before the recent Windows update.

 

I’m open to any suggestions for a solution to my problem.  Again, I’ve reinstalled/overwritten the ‘old’ installations of SDRC, but I haven’t actually uninstalled the program, rebooted the PC, and reinstalled a “clean” instance of SDRC.  I guess I’ll try that next.

 

Thanks – Ken, WBØOCV

 


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


Re: Adding an external AFEDRI-Net

Frank Eichel
 

Hi Ingolf,

Glad you got the XML plugin working in Notepad++and like the result. I had used Notepad++ for many years for coding and always liked the interface.

I heard from my fellow group members in England that there was an opening to the west coast on 20 metres yesterday. As the SFI increases along with daylight, I am looking forward to working Europe on phone again soon. Perhaps I can entice you back down to HF for a QSO some day (saw your QRZ page).

Congratulations on your 50th anniversary being a ham radio operator, mine was last year.

73, Frank VE7AWV





On Wed, 12 Jan 2022 at 23:39, sm6fhz <ingolf.fhz@...> wrote:
Thanks Frank.
Now you are talking!
Installing the "XML Tools" and choosing "Pretty print" the indentation and line breaks are as expected.
Now it is easy to read the code.
Thanks again!
BTW Frank, not much here from western Canada on the MW-band this season. We usually have at least a few openings to the west coast but this year mostly east coast stations coming through.
Listening to music on CKNB on 950 kHz with nice quality while writing this.
73 / Ingolf, SM6FHZ


Audio issue on SDR Console

Ken Sejkora
 

Hello all,

 

I’m perplexed.  Ever since updating Windows-10 (latest feature update) about 10-days ago, I’ve been hearing some intermittent “pops” and “cracks” on the audio stream from SDRC connected to an Airspy Discovery HF+.   When listening, it’s not troublesome, and only slightly noticeable, but it is there.  Platform is Win-10, X64, 32 GB RAM, 4200 MHz Intel processor.  Although not a huge issue with casual listening, it is causing problems with decoding various digital modes.  The attached image shows a WEFAX (weather FAX) session with MultiPSK from a US Coast Guard transmitter about 10-miles away.  The upper slice of the FAX image shows the reception with SDRC, and the lower half show MultiPSK processing the audio from SDRSharp.  Running the audio through WEFAX mode on a parallel session of  fldigi yields similar results when comparing SDRC with SDRSharp.  I confirmed the volume setting, filter settings, audio buffer settings, CPU usage, etc. within SDRC, and nothing seems to be amiss.

 

I also have SDR++ and HDSDR on my PC, and they produce similar successful decodes  to SDRSharp.  Audio levels, mode (USB, 2.6 kHz), and filter settings are all the same across all four SDR software packages.  Considering the physical SDR connections (antenna, USB cable) were not changed between software swaps, I don’t think it’s any kind of RF or AF overload issue. I even tried an SDRPlay RSP1 with all four programs, and get identical results, that is – successful decodes with SDRSharp, HDSRR, and SDR++, but illegible FAX with SDRC.  I’ve tried reinstalling the latest beta version of SDRC, as well as the last stable version, but neither version makes any difference.  Again, SDRSharp, HDSDR, and SDR++ all produce successful decodes with both the Airspy Discovery HF+ and  SDRPlay RSP1.

 

I’ve also tried uninstalling and reinstalling my hardware audio drivers and virtual audio cables (VB-Audio Voicemeeter), and shut down the computer and swapped the Airspy Discovery HF+ to a different USB port, but nothing resolves the noise issue within SDRC.

 

Considering that the current configuration of hardware audio driver, virtual audio cable, etc. still work with SDRSharp, HDSDR, and SDR++, I have to ‘conclude’ the problem being an issue with SDRC.  I had been using SDRC successfully with fldigi and MultiPSK a few months ago, well before the recent Windows update.

 

I’m open to any suggestions for a solution to my problem.  Again, I’ve reinstalled/overwritten the ‘old’ installations of SDRC, but I haven’t actually uninstalled the program, rebooted the PC, and reinstalled a “clean” instance of SDRC.  I guess I’ll try that next.

 

Thanks – Ken, WBØOCV

 


Re: Server Question: "No V3 Server Found" ?

Kriss Kliegle KA1GJU
 

Please see the attachments in order...

Notes:
1) The username and password on public servers is automatically uploaded. You don't have to enter anything!
2) If an SDR does not appear after step 4 in the window (just below my red step 5) then the server is not currently connected to an SDR. Happens a lot due to people not setting up properly or giving up and their computer is still sending updates to Simon's machine. Not all green check marked servers are really 100% ready to use. Unfortunately you won't find out until you attempt to use the server you spent time to make a definition. Grrrrrrrrr.


73 Kriss KA1GJU


Re: Can't Create Another Schedule

Simon Brown
 

Yes,

 

It’s not obvious. I’ve made a note…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 16:32
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

Thanks Simon,

 

I think I figured it out.  The scheduler needs me to specify a date range even if the starting and ending dates are the same.  Is that a change from a few years ago, because I don't remember having to do that before.

 

Thanks again for your help,

Ken Alexander 

VE3HLS

 

On Thu, Jan 13, 2022, 20:45 Simon Brown <simon@...> wrote:

Sorry,

 

Mea culpa. Have just replied.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 13:24
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

Hi Simon,

 

The screenshot attached to my original post is of no help?  Do you need a shot of SDRC without the scheduling window open?

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:48 Simon Brown <simon@...> wrote:

Screenshots…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 12:33
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

I was wondering about the time issue because I want the recording to start at local midnight.  However, I told the scheduler to use UTC and I can see that it does because it handled the schedule I ran previously OK.  Local midnight is 1700 UTC which you can see in the screenshot.

 

I'm still baffled...

 

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:06 sm6fhz <ingolf.fhz@...> wrote:

Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


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


--

- + - + -

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


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


Re: Can't Create Another Schedule

Ken Alexander
 

Thanks Simon,

I think I figured it out.  The scheduler needs me to specify a date range even if the starting and ending dates are the same.  Is that a change from a few years ago, because I don't remember having to do that before.

Thanks again for your help,

Ken Alexander 
VE3HLS


On Thu, Jan 13, 2022, 20:45 Simon Brown <simon@...> wrote:

Sorry,

 

Mea culpa. Have just replied.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 13:24
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

Hi Simon,

 

The screenshot attached to my original post is of no help?  Do you need a shot of SDRC without the scheduling window open?

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:48 Simon Brown <simon@...> wrote:

Screenshots…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 12:33
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

I was wondering about the time issue because I want the recording to start at local midnight.  However, I told the scheduler to use UTC and I can see that it does because it handled the schedule I ran previously OK.  Local midnight is 1700 UTC which you can see in the screenshot.

 

I'm still baffled...

 

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:06 sm6fhz <ingolf.fhz@...> wrote:

Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


--

- + - + -

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


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


Re: Server Question: "No V3 Server Found" ?

Simon Brown
 

Which radio have you added? Screenshots?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of rmrrgs
Sent: 13 January 2022 15:48
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Server Question: "No V3 Server Found" ?

 

Hi,

Still trying to get up to speed with using Servers.

I keep getting the msg. "No V3 Servers Found"

I have been trying to follow all the steps below; see the * items.  What am I likely missing, or doing incorrectly ?
I do select one that shows, apparently, that is available.

Thanks,
Bob
                  Add Definition

                      To connect to a server you must first add a server definition:

 

  1.                      From the ribbon bar select Home, Radio, Select Radio.
  2.                      In the Select Radio window click Definitions...
  3.                     In the Radio Definitions window select V3 Server at the bottom of the Search list.
  4.                     The Autodetect window is displayed.
  5. *Either:
  6. Enter the Address, Username and Password, then press Select, or
  7. *Select a worldwide server from the SDRSpace.com list.
  8.                  *If the server can be contacted a list of radios is displayed.
  9.                   *Now press OK.
  10.  
  11.      A new entry is added to the Radio Definitions window.  NOPE


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


Server Question: "No V3 Server Found" ?

rmrrgs <rgsrose@...>
 

Hi,

Still trying to get up to speed with using Servers.

I keep getting the msg. "No V3 Servers Found"

I have been trying to follow all the steps below; see the * items.  What am I likely missing, or doing incorrectly ?
I do select one that shows, apparently, that is available.

Thanks,
Bob
                  Add Definition

                      To connect to a server you must first add a server definition:

 

  1.                      From the ribbon bar select Home, Radio, Select Radio.
  2.                      In the Select Radio window click Definitions...
  3.                     In the Radio Definitions window select V3 Server at the bottom of the Search list.
  4.                     The Autodetect window is displayed.
  5. *Either:
  6. Enter the Address, Username and Password, then press Select, or
  7. *Select a worldwide server from the SDRSpace.com list.
  8.                  *If the server can be contacted a list of radios is displayed.
  9.                   *Now press OK.
  10.  
  11.      A new entry is added to the Radio Definitions window.  NOPE


Enable tx for Xiegu g90

Richard Fairman
 

I have tranceiver set up as external radio using the g90 iq output and connected to the g90 via omnirig. Is it poss to enable tx from console. The fq displays OK on console and can change fq by clicking the waterfall I assume the connection to g90 is via CAT. HRD can enable tx via the cat connection when I have used it in the  past

R


Re: Can't Create Another Schedule

Simon Brown
 

Sorry,

 

Mea culpa. Have just replied.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 13:24
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

Hi Simon,

 

The screenshot attached to my original post is of no help?  Do you need a shot of SDRC without the scheduling window open?

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:48 Simon Brown <simon@...> wrote:

Screenshots…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 12:33
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

I was wondering about the time issue because I want the recording to start at local midnight.  However, I told the scheduler to use UTC and I can see that it does because it handled the schedule I ran previously OK.  Local midnight is 1700 UTC which you can see in the screenshot.

 

I'm still baffled...

 

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:06 sm6fhz <ingolf.fhz@...> wrote:

Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


--

- + - + -

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


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


Re: Can't Create Another Schedule

Simon Brown
 

Hi,

 

Click [X] repeat and select days…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 11:38
To: SDR-Radio@groups.io
Subject: [SDR-Radio] Can't Create Another Schedule

 

It seems I used up my one free schedule.

 

I copied the schedule definition I successfully used a half hour ago and edited the Title, Start time and Duration.  However, the schedule doesn't appear in the box at the bottom of the Scheduled Recording editor window and the OK button is grayed out.  I'm using a copy of a schedule definition that just worked fine so I'm baffled as to why I can't save this new definition.  

 

Screenshot attached.  Did I leave something out?

 

Any assistance will be gratefully received.

 

73,


Ken Alexander

VE3HLS

 


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


Re: Can't Create Another Schedule

Ken Alexander
 

Hi Simon,

The screenshot attached to my original post is of no help?  Do you need a shot of SDRC without the scheduling window open?

Ken  VE3HLS


On Thu, Jan 13, 2022, 19:48 Simon Brown <simon@...> wrote:

Screenshots…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 12:33
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

I was wondering about the time issue because I want the recording to start at local midnight.  However, I told the scheduler to use UTC and I can see that it does because it handled the schedule I ran previously OK.  Local midnight is 1700 UTC which you can see in the screenshot.

 

I'm still baffled...

 

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:06 sm6fhz <ingolf.fhz@...> wrote:

Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


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


Re: Can't Create Another Schedule

Simon Brown
 

Screenshots…

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ken Alexander
Sent: 13 January 2022 12:33
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Can't Create Another Schedule

 

I was wondering about the time issue because I want the recording to start at local midnight.  However, I told the scheduler to use UTC and I can see that it does because it handled the schedule I ran previously OK.  Local midnight is 1700 UTC which you can see in the screenshot.

 

I'm still baffled...

 

Ken  VE3HLS

 

On Thu, Jan 13, 2022, 19:06 sm6fhz <ingolf.fhz@...> wrote:

Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


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


Re: Can't Create Another Schedule

Ken Alexander
 

I was wondering about the time issue because I want the recording to start at local midnight.  However, I told the scheduler to use UTC and I can see that it does because it handled the schedule I ran previously OK.  Local midnight is 1700 UTC which you can see in the screenshot.

I'm still baffled...

Ken  VE3HLS

On Thu, Jan 13, 2022, 19:06 sm6fhz <ingolf.fhz@...> wrote:
Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


Re: Can't Create Another Schedule

sm6fhz
 

Hi Ken.
There are a few criteria that need to be satisfied in order to be able to save your recording definition.

Do you have the radio running?
Have you actively selected a date and time ahead. Date and time that has passed will not work.

73 / Ingolf, SM6FHZ


Can't Create Another Schedule

Ken Alexander
 

It seems I used up my one free schedule.

I copied the schedule definition I successfully used a half hour ago and edited the Title, Start time and Duration.  However, the schedule doesn't appear in the box at the bottom of the Scheduled Recording editor window and the OK button is grayed out.  I'm using a copy of a schedule definition that just worked fine so I'm baffled as to why I can't save this new definition.  

Screenshot attached.  Did I leave something out?

Any assistance will be gratefully received.

73,

Ken Alexander
VE3HLS


Editing Recording Schedules

Ken Alexander
 

I haven't used SDRC in about 3 years, but am now in a new house in a quiet location so my DXing life can continue.

I'm creating some schedules so I can make some recordings tonight, and I could have sworn there used to be a way to highlight a particular definition and edit it...but I'm not seeing it.  Can anyone help?

Ken  VE3HLS


Re: Adding an external AFEDRI-Net

sm6fhz
 

Thanks Frank.
Now you are talking!
Installing the "XML Tools" and choosing "Pretty print" the indentation and line breaks are as expected.
Now it is easy to read the code.
Thanks again!
BTW Frank, not much here from western Canada on the MW-band this season. We usually have at least a few openings to the west coast but this year mostly east coast stations coming through.
Listening to music on CKNB on 950 kHz with nice quality while writing this.
73 / Ingolf, SM6FHZ


Re: Adding an external AFEDRI-Net

Frank Eichel
 

Hi Ingolf,

You have to add the XML plugin to Notepad++ and then select "Pretty print" or "Pretty print - indent attributes" in the XML Tools menu under Plugins to reformat the XML file for a more attractive appearance on-screen.


In days of old, Notepad++ reformatted the XML file automatically but I suppose the newer versions of the program rely on the plugin.

73, Frank VE7AWV



On Wed, 12 Jan 2022 at 20:52, jdow <jdow@...> wrote:
Um, that's only if you have notepad set for word wrap and it still looks like well ripened XML poo. It's a "feature" not a bug, though. It's more or less how XML is defined. Since white space is semi-meaningless in XML I simply put in a whole bunch of new lines. Note also that the protagonist in this story is using Notepad++ not Notepad.

I cheat - I use the Visual Studio editor.

{^_-}

On 20220112 06:05:26, Simon Brown wrote:

Which version are you using? With V3.1 it should look good ‘as-is’ in notepad.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of sm6fhz
Sent: 12 January 2022 11:11
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Adding an external AFEDRI-Net

 

Hi Frank and Ken.
Thanks for the hint.
I have installed it, but still all the lines are not separated.
If I look in a Web-browser the lines are nicely indented and each statement in it's own row.





Maybe there is a way to get a better structured view in NotePad++? But how to?

73 / Ingolf, SM6FHZ


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

jdow
 

EZNec is a wonderful and addicting toy. Get it.

{^_-}

On 20220112 08:41:14, Chris wrote:

I’m trying to get my head around how a ground plane would help low angle and reduce nulls.
Theoretically, it should have the opposite effect.
That is a really strange design but if it’s working for you who cares :)

My experience with the V dipoles is that they aren’t immune to polarization shifts. It’s quite possible that you weren’t seeing nulls in the pattern as much as nulls due to polarization changes as the bird rotates in relation to the fixed ground station.
Adding the strange reflector may be providing a fluke bounce back to the V that helps with the nulls.
At these frequencies, the height of the antenna above ground (as long as it’s more than a few wavelengths) should have negligible affect on signal strength as long as the antenna has line of sight to the transmitter.

Did you end up connecting the reflector to the coax shield?
Is it grounded in any other way (clamped to the support)?

The 137MHz noaa is quite powerful and it’s easy to overthink the antenna. I’ve had excellent results from almost anything I’ve used. From a 250’ piece of electric fence (no balun or anything to restrict bandwidth) 5’ off the ground to my 144/440 commercial ham radio antenna.

In my experience, there have only been two factors affecting reception of 137MHz birds.
1) polarization shifts causing sharp nulls during the pass
2) Line of sight being blocked by trees, buildings, other antennas, etc.

The QFH is known to be the best compromise, simply because it’s relatively immune to polarization changes and is still also pretty omnidirectional.

You do NOT really want an antenna with gain in the vertical direction. That’s when the bird is closest so it’s just wasted.

Gain comes from somewhere… it’s not magic.
if you have gain in any given direction it’s at the expense of gain in another direction. Take a balloon and squeeze it into a donut. You’ve just made a vertical dipole. Now push in one side (you will need three hands) you’ve just made a yagi, assuming you didn’t pop the balloon.

My first weather sat receiver was a modified broadcast FM tuner, an oscilloscope for a display with a Polaroid camera to capture the image and a reel to reel tape recorder to keep repeating the pass till I got the scope tweaked for any kind of image. I did use a multi element yagi on that as it was quite deaf so I spent much time on the roof manually tracking the bird.
I’m sure there are school safety regulations now that wouldn’t let it happen! Sure wish I had some of those recordings or Polaroids now!

Have fun, experiment and whether it works or not, try to figure out why.
Christopher


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