Date   

Lecture.

Colin Ranson
 

uW’ers et al

 

Very informative lecture last night streamed by BATC, many thanks to  Bryan Harber.  Most of it assimilated but due to a lack of classical electronic training some of it went ‘whoosh’ but I now  know a lot more about VNA’s than I did before.

 

Some people on the forum were commenting on the soon to be availability of a 6GHz model ?   Can anyone comment further please ?

 

Best regards to all,

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 


Re: Dish for 122GHz?

Neil Smith G4DBN
 

Hi Terry, I have several of the 12 and 18 inch versions from Edmund in York and I'm making mounting rings and cassegrains for them. The first one is looking OK after a few attempts to make them using a machined template.  It's a lot easier on a CNC dammit!

The material for the mounts is due to be delivered on Friday, so I might have something to show this weekend. Several UK folks have bought those dishes.  They are not quite optical quality, but my measurements so far on the 12 inch version show it to be pretty good and certainly better than lambda/10 at 122 GHz, although they are a bit thin and you need to take care to mount them without any stress, hence the machined support rings I'm making up (with rings cut from 6.5 inch diameter 3/4 inch wall ally pipe!)

I'm trying to get the feedpoint just about flush with the centre of the dish so we can avoid needing delicate waveguide extensions, and be able to mount an enclosure directly on the back of the dish support ring/alignment spigot. I'm aiming for about a 12.5 dB edge taper.

The deep dish complicates that as the edge is twice as far from the reflector than the centre, so you get an extra 6dB of space loss, so need less actual taper, but as always with Cassegrains, it is a big balancing act between feedhorn gain and blockage, feed distance, reflector diffraction loss versus blockage and all the other excitements of geometry.

Once I have the rings and refelctor supports sorted so that there is something to mount a VK3CV board to, I'll do some detailed checks on the gain and pattern. If the 18 inch job is as accurate as I hope, it should be a killer system, but it is going to be terribly sharp and probably not as useable as the 12 inch versions. I also have a few of those 12 inch deep black-painted spun steel dishes with a WG16-sized hole in the middle, so I'll get one measured up to see if it will work as a Cassegrain.

I have to machine up some custom feedhorns to get the geometry right, so probably that will mean a 3 or 4 wavelength Pickett-Potter or simple horn.   I'll sort that out once the subreflector is totally sorted.  I'm putting an M12 x 0.5 mm thread on the back of the subreflector to make fine adjustment a bit easier, and probably using blade-style supports for the subreflector mount, hopefully fitting  those via small holes drilled through the dish into the support ring.  I almost persuaded myself to mount the blades using magnets embedded in the ring behind the dish, and on the ends of the blades, but then I had a sensible moment.

Lots of Fusion360 models, bits of paper, spreadsheets and whiteboard scribbles going on here, but today I've been making another batch of 21 dB Pickett-Potters and part-making another dozen coupler bodies for VK3CV boards, so no additional progress on the dish project.  Plus I was at the day job from 9 to 5, then watched Bryan's excellent presentation, my productivity is dreadful.

Day off tomorrow, and I have a full day of machining heatspreaders and copper horn cores ahead, so unlikely to be any more progress on the Cassegrain project until the weekend.

Neil G4DBN

On 09/12/2020 23:26, Terry_G0EZY wrote:
Apologies if this is something that has been reported elsewhere on the Group/Scatterpoint but the January QST "Microwavelengths" article has an item on the 122 GHz transverter. It includes a suggested optical quality reflector. I thought it was going to be an expensive import from the USA but the web site re-directs to a UK distributor. The 12 inch reflector is here, with 18 and 24 inch versions.

https://www.edmundoptics.com/f/large-parabolic-reflectors/11483/ <https://www.edmundoptics.com/f/large-parabolic-reflectors/11483/>

At 44 GBP it seems worth a look but I'll leave it to experts to comment on it's suitability.

The article shows the 12 inch version with a dual-mode feed horn and Cassegrain sub-reflector turned on a CNC lathe by W1GHZ

73 Terry


Re: Dish for 122GHz?

Terry_G0EZY
 

Apologies to G4DBN, I've just seen on the 122 GHz transverter group that Neil is already using one.

73 Terry


Re: Dish for 122GHz?

Terry_G0EZY
 

Apologies if this is something that has been reported elsewhere on the Group/Scatterpoint but the January QST "Microwavelengths" article has an item on the 122 GHz transverter. It includes a suggested optical quality reflector. I thought it was going to be an expensive import from the USA but the web site re-directs to a UK distributor. The 12 inch reflector is here, with 18 and 24 inch versions. 

https://www.edmundoptics.com/f/large-parabolic-reflectors/11483/

At 44 GBP it seems worth a look but I'll leave it to experts to comment on it's suitability.

The article shows the 12 inch version with a dual-mode feed horn and Cassegrain sub-reflector turned on a CNC lathe by W1GHZ

73 Terry


Re: QO100 Weak signal test

Glyn M0XGT
 

Cool, here's the power spectral density (PSD) plot of the Goonhilly WebSDR audio stream :) 
Frequency axis reference is 10489984.0 kHz and red dotted lines spaced at 
13.889 Hz.

 

Glyn M0XGT


Re: QO100 Weak signal test

SAM JEWELL
 

Consistent -21 decodes, now
Sam 


Sent tomorrow from my time machine


On 9 Dec 2020, at 17:12, Andy G4JNT <andy.g4jnt@...> wrote:


I just walked into the shack - that will have disturbed the GPS standing wave pattern in the room.     The antenna is not in a good situation for accurate positioning



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 17:10, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
Just saw AL70, otherwise AK88/89
Nothing since 17:07
I can still see the tones
Then back at 17:09 as AL80

Sam 

Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Andy G4JNT
 

That will have blipped the Loc. reading a few minutes ago
Just leaned over it to take this photo:




Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 17:11, Andy Talbot <andy.g4jnt@...> wrote:
I just walked into the shack - that will have disturbed the GPS standing wave pattern in the room.     The antenna is not in a good situation for accurate positioning



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 17:10, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
Just saw AL70, otherwise AK88/89
Nothing since 17:07
I can still see the tones
Then back at 17:09 as AL80

Sam 

Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Andy G4JNT
 

Nope, still as it was.



On Wed, 9 Dec 2020 at 17:17, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
Have you wound the power down, now?
Odd decodes at -22

Sam


Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

SAM JEWELL
 

Have you wound the power down, now?
Odd decodes at -22

Sam


Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Andy G4JNT
 

I just walked into the shack - that will have disturbed the GPS standing wave pattern in the room.     The antenna is not in a good situation for accurate positioning



Virus-free. www.avg.com


On Wed, 9 Dec 2020 at 17:10, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
Just saw AL70, otherwise AK88/89
Nothing since 17:07
I can still see the tones
Then back at 17:09 as AL80

Sam 

Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

SAM JEWELL
 

G4JNT LOCBCN

Sam 

Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

SAM JEWELL
 

Just saw AL70, otherwise AK88/89
Nothing since 17:07
I can still see the tones
Then back at 17:09 as AL80

Sam 

Sent tomorrow from my time machine


On 9 Dec 2020, at 17:05, Andy G4JNT <andy.g4jnt@...> wrote:


Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

SAM JEWELL
 

Consistent 88/89 here

Sam


Sent tomorrow from my time machine


On 9 Dec 2020, at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:

Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Andy G4JNT
 

Not too surprising.    Those last two digits of the 12-character Locator correspond to squaroids of approximately 1.8m.   I've haven't seen a GNSS yet, just using C/A code, that suggests it'll give better resolution than 5m.    I'm surprised those digits are as stable as they are, considering it's only on an indoor GPS antenna

My QTH is as the corner of four of the larger squaroids.   So depending where in the property I sit the GPS, it shows  IO90IV48XL, IO90IV58AK, IO90IV48XK  IO58AL  all neglecting the very hi-res pair of digits.



Virus-free. www.avg.com


On Wed, 9 Dec 2020 at 16:49, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Mike Willis
 


1558 -19 0.0 1288 @ IO90IV58AL80.

1559 -18 0.0 1284 @ IO90IV58AL80.

1600 -19 0.0 1281 @ G4JNT LOCBCN.

1601 -18 0.0 1282 @ IO90IV58AL80.

1602 -19 0.0 1281 @ IO90IV58AL80.

1603 -19 0.0 1277 @ IO90IV58AL80.

1604 -19 0.0 1278 @ IO90IV58AL80.

1605 -18 0.0 1282 @ IO90IV58AL80.

1606 -18 0.0 1281 @ IO90IV58AL80.

1607 -18 0.0 1272 @ IO90IV58AL80.

1608 -19 0.0 1275 @ IO90IV58AL81.

1609 -19 0.0 1273 @ IO90IV58AL81.

1610 -19 0.0 1272 @ G4JNT LOCBCN.

1611 -19 0.0 1273 @ IO90IV58AL70.

1612 -18 0.0 1274 @ IO90IV58AL70.

1613 -18 0.0 1275 @ IO90IV58AL80.

1614 -18 0.0 1273 @ IO90IV58AL70.

1615 -19 0.0 1274 @ IO90IV58AL80.

1616 -19 0.0 1278 @ IO90IV58AL81.

1617 -19 0.0 1276 @ IO90IV58AL81.

1618 -19 0.0 1275 @ IO90IV58AL91.

1619 -19 0.0 1277 @ IO90IV58AL91.

1620 -19 0.0 1276 @ G4JNT LOCBCN.

1621 -18 0.0 1277 @ IO90IV58AL81.

1622 -18 0.0 1278 @ IO90IV58AL81.

1623 -17 0.0 1276 @ IO90IV58AL81.

1624 -19 0.0 1277 @ IO90IV58AL81.

1625 -19 0.0 1272 @ IO90IV58AL81.

1626 -18 0.0 1272 @ IO90IV58AL81.

1627 -18 0.0 1276 @ IO90IV58AL71.

1628 -18 0.0 1277 @ IO90IV58AL70.

1629 -19 0.0 1276 @ IO90IV58AL71.

1630 -18 0.0 1276 @ G4JNT LOCBCN.

1631 -19 0.0 1279 @ IO90IV58AL71.

1632 -19 0.0 1278 @ IO90IV58AL72.

1633 -20 0.0 1277 @ IO90IV58AL72.

1634 -19 0.0 1279 @ IO90IV58AL71.

1635 -19 0.0 1281 @ IO90IV58AL71.

1636 -18 0.0 1279 @ IO90IV58AL71.

1637 -19 0.0 1275 @ IO90IV58AL71.

1638 -19 0.0 1276 @ IO90IV58AL70.

1639 -19 0.0 1278 @ IO90IV58AL70.

1640 -18 0.0 1276 @ G4JNT LOCBCN.

1641 -18 0.0 1277 @ IO90IV58AL70.

1642 -20 0.0 1277 @ IO90IV58AL70.

1643 -19 0.0 1274 @ IO90IV58AL70.

1644 -18 0.0 1275 @ IO90IV58AL70.

1645 -18 0.0 1276 @ IO90IV58AL60.

1646 -19 0.0 1277 @ IO90IV58AL70.

1647 -18 0.0 1276 @ IO90IV58AL60.

1648 -20 0.0 1278 @ IO90IV58AL70.

1649 -19 0.0 1276 @ IO90IV58AL70.

1650 -17 0.0 1276 @ G4JNT LOCBCN.

1651 -19 0.0 1275 @ IO90IV58AL70.

1652 -18 0.0 1274 @ IO90IV58AL70.

1653 -19 0.0 1277 @ IO90IV58AL70.

1654 -18 0.0 1277 @ IO90IV58AL70.

1655 -18 0.0 1277 @ IO90IV58AL70.

1656 -18 0.0 1275 @ IO90IV58AL70.

1657 -18 0.0 1273 @ IO90IV58AL70.

1658 -19 0.0 1270 @ IO90IV58AL70.

1659 -18 0.0 1269 @ IO90IV58AK79.

1700 -19 0.0 1275 @ G4JNT LOCBCN.

1701 -18 0.0 1274 @ IO90IV58AK89.

1702 -19 0.0 1274 @ IO90IV58AK88.

1703 -18 0.0 1274 @ IO90IV58AK88.




--
Mike G0MJW


Re: QO100 Weak signal test

SAM JEWELL
 

-21 on 1m Triax dish with Octagon LNB

73 de Sam, G4DDK


Sent tomorrow from my time machine


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Denis Stanton G0OLX
 

Andy 
Your Gps is wondering from last two digits showing as 60 to 70
Denis
G0OLX


On 9 Dec 2020, at 16:45, Andy G4JNT <andy.g4jnt@...> wrote:


Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com

On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Andy G4JNT
 

Check the upper beacon, 15kHz above me.   Same tuning criteria, but freq set set for 10489.999 will give you (one of the) CW tones at 1kHz



Virus-free. www.avg.com


On Wed, 9 Dec 2020 at 16:43, Ed G3VPF <g3vpf@...> wrote:

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Ed G3VPF
 

OK, understood.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 09 December 2020 16:43
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

Not at the moment, this is for the really weak signal people.

I can do  higher power another day

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 

 

On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

 


Re: QO100 Weak signal test

Andy G4JNT
 

Not at the moment, this is for the really weak signal people.
I can do  higher power another day



Virus-free. www.avg.com


On Wed, 9 Dec 2020 at 16:41, Ed G3VPF <g3vpf@...> wrote:

Andy

 

No copy here at the moment on a 0.6m dish with a tree in the way. Any chance you could up the power for a short time so I can have confidence I am actually listening on the right frequency.

 

Ed G3VPF

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 09 December 2020 16:22
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] QO100 Weak signal test

 

I’ll have a go, shortly, Andy. Cuppa first, though!

Sent tomorrow from my time machine

 



On 9 Dec 2020, at 16:14, Andy G4JNT <andy.g4jnt@...> wrote:



Not yet, I'll give a few more people a chance first

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Wed, 9 Dec 2020 at 16:13, Mike Willis <willis.mj@...> wrote:

On Wed, Dec 9, 2020 at 01:36 PM, Andy G4JNT wrote:

Running again, and it is weak this time.

+8dBm  direct from the synth  into helix antenna, so circa. -4dBW EIRP

CAn you drop it 3 dB. You are too strong - easy to see on the waterfall and waveform plots.

<dummyfile.0.part>


 
--
Mike G0MJW

 

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