Date   
Re: WebSDRs on SHF

Richard <richard@...>
 

Just plugging a sdcard in would be nice, but you will still have to setup certain parameters.
not difficult , linux isn't difficult , its all microsoft propaganda .
I would recommend running an openvpn server as well, it means having registered users, but it will stop
unwanted access. It would be better to use a Raspberry PI 3 or one of the later odroids C2 or XU4
as the early raspberry PI a or B would be a bit slow under load.
The other thing to bear in mind on a remote site is that SDcards do not last long, there is a finite read/write limit.
the Odroids can use EMMC or SDcards.

Hope thats not too confusing
Richard g8jvm




On Mon, 2019-02-25 at 20:34 +0000, Ed G3VPF via Groups.Io wrote:

Tieing up equipment is not a problem. The site I have in mind is a remote site so it will need to be dedicated equipment. There is a bandwidth limit on the internet access because of the way it is connected. I have looked at the WEBSDR software and the kiwisdr software. The kiwi system has the advantage of  being limited to four users at a time so is likely to stay within my bandwidth restrictions.

However, if we are to move towards a coordinated system then there needs to be a unified set of software that we all use. A central server would be interesting, but just getting an increased number of websdr systems on, particularly on the less-well used bands would be very useful.

My problem is that I am not familiar with Lnux so setting up any linux system as a websdr system is likely to be very time consuming. If someonewith more expertise came up with a programmed SD card I can plug into a Raspberry Pi and just connect to the internet and an SDR module then this would speed things up considerably.

Ed G3VPF


On Monday, 25 February 2019, 19:29:03 GMT, Richard <richard@...> wrote:


Just a foot note in case someone says , well Amsat have a wedsdr

Just happens to be at the end of a major fibre trunk with massive capacity


On Mon, 2019-02-25 at 19:00 +0000, Richard wrote:


No reason why not Adrian the Raspberry PI is a good little SBC
The difference is thats passing data to a central server, and you're not using the data from your SDR , but using the collected data as a whole
entity.
If you set up a local web sdr server you have to use it as a client, albeit as your own system you have extra privileges.
And I suspect most will want to see what they are receiving as it happens, and not log in to a remote server.
If a central server is used , who is going to fund it ?
An even bigger problem is the majority are listeners, not as bad as some who only turn their rigs on on Tuesday evenings then turn them off for a month.
Also the same people that complain of lack of activity,
But unless a lot of thought is put in , it will end up as a microwave WSPR network

The easiest way is to run a local web sdr and allow others to log in a view the logs, The later version of the Rasp Pi could do this and provide a secure net interface.
The hard thing is logging a trace on a waterfall display, so you really need to live stream the sdr output, then you are up against your upload rates if multiple user logins.
my thought s
Richard g8jvm

On Mon, 2019-02-25 at 18:32 +0000, Adrian G4UVZ via Groups.Io wrote:

Like Ed, I am no computer expert ! However I have a Raspberry PI connected to an SDR which receives ADSB data on 1060Mhz .This is magically fed into the interweb and contributes to the UK Radar360 network. Not sure if this could be upscaled to provide a simple websdr?

G4UVZ

----Original message----
From : richard@...
Date : 25/02/2019 - 18:23 (GMTST)
To : UKMicrowaves@groups.io
Subject : Re: [UKMicrowaves] WebSDRs on SHF

This is where there is a problem Ed.
The amount of SDR RX and type available will cause a problem as amongst the amateur community there is no standard.
Its easy enough to design an interface with one of the SBCs , its the interface between your flavour of SDR and the interface to the internet
which will be fun.
The last thing anyone wants is to tie up equipment so they cant use it.
Richard G8JVM

On Mon, 2019-02-25 at 18:00 +0000, Ed G3VPF via Groups.Io wrote:
I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

Ed G3VPF


Sent from Yahoo Mail for iPad

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








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Re: GPSDO

John Worsnop
 

Fyi. T
he 25 + 10MHz combination shown on the UKug Wiki will program on my unit but produces an awful unstable sounding signal. 
Maybe Leo could investigate this and let us know if it's the same on all units or just mine? 

73 John 


On Mon, 25 Feb 2019, 20:39 Dave G8GKQ, <dave.g8gkq@...> wrote:
Jerry

Once you set the parameters, you need to reboot before the new secondary frequencies are available.

Dave, G8GKQ

Re: RDDS boards, etc

Dave
 

Hi Richard,
I have a spare RDDS board if you would like it .
All the best,
David. G4GLT

On 25 Feb 2019, at 14:45, Richard <richard@...> wrote:

Are there any RDDS boards still in existence. ?
I seem to remember John posting the supply was stopping.
If I do put my 3cms in to beacon mode when not in use I will need
another to separate out the LO for that band.

I do already have a few LMX2541 and a PCB for generating the 144.xxx IF
source, IF the phase noise on that device can be kept low enough for me
not to hear it on 2mtrs , I only use 25mW of LF drive to to transverter
--
Best wishes /73
Richard Bown

Email : richard@...

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################




Re: GPSDO

Dave G8GKQ
 

Jerry

Once you set the parameters, you need to reboot before the new secondary frequencies are available.

Dave, G8GKQ

Re: UK Microwave Group Low Band Contest - Sunday 3rd March

Neil Smith G4DBN
 

Hi Ben, most activity is around 2320.200, plus or minus 50kHz, but most 13cm contacts are set up via KST or Zello or from a contact on 23cm.  You might find some talkback on 144.390 as well.  There are very few stations on 2300, I usually manage to work just one, so you have the whole band to choose from.  I tend to choose .140, but for no particular reason.

I'll be looking around on 23cm and watching KST, and I'll monitor Zello SHF Chat.  If you want to use that, install the app and say hello to the moderators so your account is enabled in advance.

If you see me on KST, I'll be by the radio.  If not, I'll be doing something else.  I tend to do a couple of hours through the period of the contest, dipping in and out.

Neil G4DBN

On 25/02/2019 19:14, militaryoperator via Groups.Io wrote:
The first UKuG contest of 2019 is this Sunday 3rd March, from 1000-1600.
Bands are 1.3GHz, 2.30GHz, 2.32GHz, and 3.4GHz. Exchange is the usual
report and serial number plus 6 digit locator. The full rules are here:

73
John G3XDY
UKuG Contest Manager

----------------------------------------------------------------

John. What would be the usual calling/operating frequencies on the 2.3 and 2.32 bands?

only I need to flick dip switches in my SG Labs transverter.

Thanks, Ben.

Re: WebSDRs on SHF

Ed G3VPF
 


Tieing up equipment is not a problem. The site I have in mind is a remote site so it will need to be dedicated equipment. There is a bandwidth limit on the internet access because of the way it is connected. I have looked at the WEBSDR software and the kiwisdr software. The kiwi system has the advantage of  being limited to four users at a time so is likely to stay within my bandwidth restrictions.

However, if we are to move towards a coordinated system then there needs to be a unified set of software that we all use. A central server would be interesting, but just getting an increased number of websdr systems on, particularly on the less-well used bands would be very useful.

My problem is that I am not familiar with Lnux so setting up any linux system as a websdr system is likely to be very time consuming. If someonewith more expertise came up with a programmed SD card I can plug into a Raspberry Pi and just connect to the internet and an SDR module then this would speed things up considerably.

Ed G3VPF


On Monday, 25 February 2019, 19:29:03 GMT, Richard <richard@...> wrote:


Just a foot note in case someone says , well Amsat have a wedsdr

Just happens to be at the end of a major fibre trunk with massive capacity


On Mon, 2019-02-25 at 19:00 +0000, Richard wrote:


No reason why not Adrian the Raspberry PI is a good little SBC
The difference is thats passing data to a central server, and you're not using the data from your SDR , but using the collected data as a whole
entity.
If you set up a local web sdr server you have to use it as a client, albeit as your own system you have extra privileges.
And I suspect most will want to see what they are receiving as it happens, and not log in to a remote server.
If a central server is used , who is going to fund it ?
An even bigger problem is the majority are listeners, not as bad as some who only turn their rigs on on Tuesday evenings then turn them off for a month.
Also the same people that complain of lack of activity,
But unless a lot of thought is put in , it will end up as a microwave WSPR network

The easiest way is to run a local web sdr and allow others to log in a view the logs, The later version of the Rasp Pi could do this and provide a secure net interface.
The hard thing is logging a trace on a waterfall display, so you really need to live stream the sdr output, then you are up against your upload rates if multiple user logins.
my thought s
Richard g8jvm

On Mon, 2019-02-25 at 18:32 +0000, Adrian G4UVZ via Groups.Io wrote:

Like Ed, I am no computer expert ! However I have a Raspberry PI connected to an SDR which receives ADSB data on 1060Mhz .This is magically fed into the interweb and contributes to the UK Radar360 network. Not sure if this could be upscaled to provide a simple websdr?

G4UVZ

----Original message----
From : richard@...
Date : 25/02/2019 - 18:23 (GMTST)
To : UKMicrowaves@groups.io
Subject : Re: [UKMicrowaves] WebSDRs on SHF

This is where there is a problem Ed.
The amount of SDR RX and type available will cause a problem as amongst the amateur community there is no standard.
Its easy enough to design an interface with one of the SBCs , its the interface between your flavour of SDR and the interface to the internet
which will be fun.
The last thing anyone wants is to tie up equipment so they cant use it.
Richard G8JVM

On Mon, 2019-02-25 at 18:00 +0000, Ed G3VPF via Groups.Io wrote:
I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

Ed G3VPF


Sent from Yahoo Mail for iPad

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








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This email has been checked for viruses by AVG.
https://www.avg.com









Re: SRD ?

Richard <richard@...>
 

Ben
I dont know if this is for what we were talking about earlier today, but you may have a frequency source already.
You didn't sat what type of analyser you have, you said 1 GHz, so I dont think HP,
But have a look and see if the 1st LO is available .
On the HP141 the 1st LO is available on the 1.2 GHz plugin.
From memory it covers 1.2 GHz to 2.4 GHz and if you put the SA in zero sweep you can use the LO as a signal source on 13 cms
I used to do it long time ago

HTH
Richard


On Mon, 2019-02-25 at 19:44 +0000, militaryoperator via Groups.Io wrote:

Anyone have a source of SRD ? ebay ones seem to be all Russian etc. 

Ben.,

Re: SRD ?

Richard <richard@...>
 

The Russian one are OK
I've used them at 600MHz,& 1.8GHz multiplying to 9GHz
Richard

On Mon, 2019-02-25 at 19:44 +0000, militaryoperator via Groups.Io wrote:

Anyone have a source of SRD ? ebay ones seem to be all Russian etc. 

Ben.,

Re: SRD ?

militaryoperator
 


Anyone have a source of SRD ? ebay ones seem to be all Russian etc. 

Ben.,

Re: WebSDRs on SHF

Richard <richard@...>
 

Just a foot note in case someone says , well Amsat have a wedsdr

Just happens to be at the end of a major fibre trunk with massive capacity


On Mon, 2019-02-25 at 19:00 +0000, Richard wrote:


No reason why not Adrian the Raspberry PI is a good little SBC
The difference is thats passing data to a central server, and you're not using the data from your SDR , but using the collected data as a whole
entity.
If you set up a local web sdr server you have to use it as a client, albeit as your own system you have extra privileges.
And I suspect most will want to see what they are receiving as it happens, and not log in to a remote server.
If a central server is used , who is going to fund it ?
An even bigger problem is the majority are listeners, not as bad as some who only turn their rigs on on Tuesday evenings then turn them off for a month.
Also the same people that complain of lack of activity,
But unless a lot of thought is put in , it will end up as a microwave WSPR network

The easiest way is to run a local web sdr and allow others to log in a view the logs, The later version of the Rasp Pi could do this and provide a secure net interface.
The hard thing is logging a trace on a waterfall display, so you really need to live stream the sdr output, then you are up against your upload rates if multiple user logins.
my thought s
Richard g8jvm

On Mon, 2019-02-25 at 18:32 +0000, Adrian G4UVZ via Groups.Io wrote:

Like Ed, I am no computer expert ! However I have a Raspberry PI connected to an SDR which receives ADSB data on 1060Mhz .This is magically fed into the interweb and contributes to the UK Radar360 network. Not sure if this could be upscaled to provide a simple websdr?

G4UVZ

----Original message----
From : richard@...
Date : 25/02/2019 - 18:23 (GMTST)
To : UKMicrowaves@groups.io
Subject : Re: [UKMicrowaves] WebSDRs on SHF

This is where there is a problem Ed.
The amount of SDR RX and type available will cause a problem as amongst the amateur community there is no standard.
Its easy enough to design an interface with one of the SBCs , its the interface between your flavour of SDR and the interface to the internet
which will be fun.
The last thing anyone wants is to tie up equipment so they cant use it.
Richard G8JVM

On Mon, 2019-02-25 at 18:00 +0000, Ed G3VPF via Groups.Io wrote:
I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

Ed G3VPF


Sent from Yahoo Mail for iPad

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








---
This email has been checked for viruses by AVG.
https://www.avg.com









Re: UK Microwave Group Low Band Contest - Sunday 3rd March

militaryoperator
 

The first UKuG contest of 2019 is this Sunday 3rd March, from 1000-1600.
Bands are 1.3GHz, 2.30GHz, 2.32GHz, and 3.4GHz. Exchange is the usual
report and serial number plus 6 digit locator. The full rules are here:

73
John G3XDY
UKuG Contest Manager

----------------------------------------------------------------

John. What would be the usual calling/operating frequencies on the 2.3 and 2.32 bands?

only I need to flick dip switches in my SG Labs transverter.

Thanks, Ben.

Re: WebSDRs on SHF

Richard <richard@...>
 



No reason why not Adrian the Raspberry PI is a good little SBC
The difference is thats passing data to a central server, and you're not using the data from your SDR , but using the collected data as a whole
entity.
If you set up a local web sdr server you have to use it as a client, albeit as your own system you have extra privileges.
And I suspect most will want to see what they are receiving as it happens, and not log in to a remote server.
If a central server is used , who is going to fund it ?
An even bigger problem is the majority are listeners, not as bad as some who only turn their rigs on on Tuesday evenings then turn them off for a month.
Also the same people that complain of lack of activity,
But unless a lot of thought is put in , it will end up as a microwave WSPR network

The easiest way is to run a local web sdr and allow others to log in a view the logs, The later version of the Rasp Pi could do this and provide a secure net interface.
The hard thing is logging a trace on a waterfall display, so you really need to live stream the sdr output, then you are up against your upload rates if multiple user logins.
my thought s
Richard g8jvm

On Mon, 2019-02-25 at 18:32 +0000, Adrian G4UVZ via Groups.Io wrote:

Like Ed, I am no computer expert ! However I have a Raspberry PI connected to an SDR which receives ADSB data on 1060Mhz .This is magically fed into the interweb and contributes to the UK Radar360 network. Not sure if this could be upscaled to provide a simple websdr?

G4UVZ

----Original message----
From : richard@...
Date : 25/02/2019 - 18:23 (GMTST)
To : UKMicrowaves@groups.io
Subject : Re: [UKMicrowaves] WebSDRs on SHF

This is where there is a problem Ed.
The amount of SDR RX and type available will cause a problem as amongst the amateur community there is no standard.
Its easy enough to design an interface with one of the SBCs , its the interface between your flavour of SDR and the interface to the internet
which will be fun.
The last thing anyone wants is to tie up equipment so they cant use it.
Richard G8JVM

On Mon, 2019-02-25 at 18:00 +0000, Ed G3VPF via Groups.Io wrote:
I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

Ed G3VPF


Sent from Yahoo Mail for iPad

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








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Re: GB3CCX closedown

Graham G3TCT
 

Hi Murray

Do you understand the rationale for GB3IOW? Given that G8MBU has been on air for several years?
And how can anyone object to 24GHz if it's a primary allocation?

73
Graham


  Re: GB3CCX closedown
From: Murray Niman
Date: Mon, 25 Feb 2019 13:11:04 GMT

Lets get some further bad news out of the way...

I can now confirm that all applications for the moves of GB3CLE (23cm) and GB3IOW (23cm, 10+24) are now defunct  following unsuccessful appeals via Ofcom vs Primary User objections

Re: WebSDRs on SHF

Adrian G4UVZ
 

Like Ed, I am no computer expert ! However I have a Raspberry PI connected to an SDR which receives ADSB data on 1060Mhz .This is magically fed into the interweb and contributes to the UK Radar360 network. Not sure if this could be upscaled to provide a simple websdr?

G4UVZ

----Original message----
From : richard@...
Date : 25/02/2019 - 18:23 (GMTST)
To : UKMicrowaves@groups.io
Subject : Re: [UKMicrowaves] WebSDRs on SHF

This is where there is a problem Ed.
The amount of SDR RX and type available will cause a problem as amongst the amateur community there is no standard.
Its easy enough to design an interface with one of the SBCs , its the interface between your flavour of SDR and the interface to the internet
which will be fun.
The last thing anyone wants is to tie up equipment so they cant use it.
Richard G8JVM

On Mon, 2019-02-25 at 18:00 +0000, Ed G3VPF via Groups.Io wrote:
I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

Ed G3VPF


Sent from Yahoo Mail for iPad

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








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https://www.avg.com









Re: WebSDRs on SHF

Richard <richard@...>
 

This is where there is a problem Ed.
The amount of SDR RX and type available will cause a problem as amongst the amateur community there is no standard.
Its easy enough to design an interface with one of the SBCs , its the interface between your flavour of SDR and the interface to the internet
which will be fun.
The last thing anyone wants is to tie up equipment so they cant use it.
Richard G8JVM

On Mon, 2019-02-25 at 18:00 +0000, Ed G3VPF via Groups.Io wrote:
I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

Ed G3VPF


Sent from Yahoo Mail for iPad

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








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https://www.avg.com







Re: GB3CCX closedown

DAVID G4ASR
 

I will be out portable (IO82LB - Herefordshire) on Tuesday with 3cm so it's going to be interesting calibrating bearings and frequency without GB3CCX and GB3LEX. I expect to be qrv on 3cm (and 13cm) from 2.30pm so if anyone is around to give me a signal please give me a shout. I will be on KST, Zello and mobile phone 07749 805 445. 
73 David G4ASR

Re: WebSDRs on SHF

Ed G3VPF
 

I have a good site (500 ft asl) on the south coast available with power and internet. Have a 23cms masthead unit available and space for a second masthead system, perhaps 3cms. My difficulty is not the RF side but the software side.

Does anyone have a suitable processing box that will sit between the SDR interface and the internet that I can just plug-in and go?

On Monday, February 25, 2019, 17:09, g4zod@... via Groups.Io <g4zod@...> wrote:

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail
On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








---
This email has been checked for viruses by AVG.
https://www.avg.com







Re: UK Microwave Group Low Band Contest - Sunday 3rd March

Dave - G4RQI
 

Hello John,

 

I hope to be on 13cm

 

Callsign: G4RQI
Locator: IO93IR
Bands: 2.3GHz 50W 44ELE

Times: 10:00 – 12:00
Talkback: ON4KST, Zello SHF chat if I really have to 😊

 

73 David

Sent from Mail for Windows 10

 


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of John Quarmby via Groups.Io <g3xdy@...>
Sent: Monday, February 25, 2019 12:23:01 PM
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] UK Microwave Group Low Band Contest - Sunday 3rd March
 
The first UKuG contest of 2019 is this Sunday 3rd March, from 1000-1600.
Bands are 1.3GHz, 2.30GHz, 2.32GHz, and 3.4GHz. Exchange is the usual
report and serial number plus 6 digit locator. The full rules are here:

https://www.microwavers.org/files/2019-mwrules.pdf

As usual I will send out an activity list on the Saturday morning, so
please post details of planned operation by this Friday night. The
preferred format is:

Callsign: G3XDY
Locator: JO02OB
Bands: 1.3GHz 400W 4 x 23ele
              2.3GHz 250W 0.8m dish
              3.4GHz 20W 0.8m dish
Times: Various throughout
Talkback: ON4KST, Zello SHF chat, direct CQ on 1.3GHz

73

John G3XDY
UKuG Contest Manager





Re: WebSDRs on SHF

g4zod@btinternet.com
 

I have some spare wave guide in stock and there is no reason why I could not pop it into my Mill and cut some slots in it.
What sort of accuracy is required?
Many thanks
G4ZOD
Sent from BlueMail

On 25 Feb 2019, at 15:07, Neil Smith G4DBN <neil@...> wrote:
I'd be totally happy to machine up a load of omni slot arrays and send 
them out free* in return for a small donation to UKuG funds. I've got a
7ft tall 23cm reduced-height waveguide slot array taking shape in the
machine shop now, something like that would scale easily to the higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube.  Maybe a size that would allow standard copper water pipe to fit
in the end of a LNB maybe with a coupling sleeve.  A simple design for
the home constructor would be good.  A simple pipe cap on the top and
some silicone sealant at the bottom.  Probably need some tape to seal
the slots.  Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting licences
for beacons on some bands has got me thinking about whether a wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes and
report to PSKReporter or the RBN as well as have the usual WebSDR
display.  Perhaps that might be a project to push now that so many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni antenna
which would work with the usual LNBs and be simple enough to put up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same as
we have now with FT8 on 2m.  I just call CQ for 10 minutes, spinning
the beam every other transmission, and I get a coverage map showing
where I am being heard.  Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice if
there was a way to know when they were operating.  Perhaps some sort
of auto-update facililty on Beaconspot so it is aware of when the
personal beacon is transmitting?

Neil G4DBN








---
This email has been checked for viruses by AVG.
https://www.avg.com







Re: WebSDRs on SHF

Richard <richard@...>
 

Hi Neil
I'll take you up on the offer of a slot if I can get hold of another
RDDS board.
Although the ideal for me would be a WG switch, I could just add
another relay in the transverter casing and run coax to the slot.

Giving it more thought, I do have a spare Odroid C1+, like a rasp PI 2
which I can use for accurate time switching, that can use NTP so the
periods can be very accurate, and I was thinking 15min cycles, that
gives plenty of time for the PA to cool down .

So I could beacon 1st and 3rd 15 mins segments each hour. which means I
have use for the other half hour. That gets over the problem with
personal beacons not knowing when they are on. Keying would be either
A1 or F1

Anyone object ???, my last attempts at a beacon from here were met with
open hostility .

73 Richard g8jvm

On Mon, 2019-02-25 at 15:06 +0000, Neil Smith G4DBN wrote:
I'd be totally happy to machine up a load of omni slot arrays and
send
them out free* in return for a small donation to UKuG funds. I've got
a
7ft tall 23cm reduced-height waveguide slot array taking shape in
the
machine shop now, something like that would scale easily to the
higher
bands, maybe 8 slots per face milled in ally, or better, a tubular
arrangement, with a nice easy way to couple to an LNB without needing
to
machine the feedhorn off.

If it would fit in a bit of polythene pipe as a radome, so much the
better.

Neil G4DBN

*offer limited to the first 50 takers!

On 25/02/2019 13:19, PAUL NICKALLS via Groups.Io wrote:
I have seen slotted omni (or nearly) antennas made from circular
tube. Maybe a size that would allow standard copper water pipe to
fit
in the end of a LNB maybe with a coupling sleeve. A simple design
for
the home constructor would be good. A simple pipe cap on the top
and
some silicone sealant at the bottom. Probably need some tape to
seal
the slots. Anyone got time to experiment?

Paul G8AQA

On 25/02/2019 12:40, Neil Smith G4DBN wrote:
The loss of the CCX beacons and the difficulties in getting
licences
for beacons on some bands has got me thinking about whether a
wider
network of home-sited WebSDRs might actually be of more use than
remote beacons. Especially if they were able to receive digimodes
and
report to PSKReporter or the RBN as well as have the usual
WebSDR
display. Perhaps that might be a project to push now that so
many
new stations are taking advantage of the very simple and cheap
receive options available for 3cm.

OK, we'd need to come up with a decent design for an omni
antenna
which would work with the usual LNBs and be simple enough to put
up
on a chimney in an unobtrusive radome, but a few dozen of those
dotted around the UK might make for an interesting resource, same
as
we have now with FT8 on 2m. I just call CQ for 10 minutes,
spinning
the beam every other transmission, and I get a coverage map
showing
where I am being heard. Might also encourage a few more to try
microwave band operating from home.

Personal beacons are always hugely welcome, but it would be nice
if
there was a way to know when they were operating. Perhaps some
sort
of auto-update facililty on Beaconspot so it is aware of when
the
personal beacon is transmitting?

Neil G4DBN






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