Date   
Re: wanted dish feeds for the Es hail 2 satellite

David M0TGC
 

Hi
 
Isn’t there a way to tweak the resonance?  AFAIK the critical variables are the feed point position and the spacing between the plates.  Anyone??
 
David M0TGC
 

From: KENT BRITAIN
Sent: Thursday, June 6, 2019 20:00
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] wanted dish feeds for the Es hail 2 satellite
 
Hi Paul
 
I did make up a batch of 2.4 GHz CP patches and using
G4DDK's station had a QSO with PA1EW.    Sam
should still have a supply of these patches. 
If not, I do.
 
73 Kent WA5VJB/G8EMY/2E0VAA
 
On Thursday, June 6, 2019, 1:40:03 PM CDT, Paul Bicknell <paul@...> wrote:
 
 
Hi all

Is any one making dish feeds for the Es hail 2 satellite

As we have just finished and tested 3 feeds of the circular design
But unfortunately we must have made a mistake as all 3 tune up at 2.6 ghz

Regards Paul



--
Paul Bicknell G8KFW   South Coast UK



Re: wanted dish feeds for the Es hail 2 satellite

KENT BRITAIN
 

Easily done, if you have the test equipment to measure it.  



On Thursday, June 6, 2019, 4:04:06 PM CDT, David M0TGC <davidn@...> wrote:


Hi
 
Isn’t there a way to tweak the resonance?  AFAIK the critical variables are the feed point position and the spacing between the plates.  Anyone??
 
David M0TGC
 
From: KENT BRITAIN
Sent: Thursday, June 6, 2019 20:00
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] wanted dish feeds for the Es hail 2 satellite
 
Hi Paul
 
I did make up a batch of 2.4 GHz CP patches and using
G4DDK's station had a QSO with PA1EW.    Sam
should still have a supply of these patches. 
If not, I do.
 
73 Kent WA5VJB/G8EMY/2E0VAA
 
On Thursday, June 6, 2019, 1:40:03 PM CDT, Paul Bicknell <paul@...> wrote:
 
 
Hi all

Is any one making dish feeds for the Es hail 2 satellite

As we have just finished and tested 3 feeds of the circular design
But unfortunately we must have made a mistake as all 3 tune up at 2.6 ghz

Regards Paul



--
Paul Bicknell G8KFW   South Coast UK



Re: wanted dish feeds for the Es hail 2 satellite

David M0TGC
 

How did you measure the resonance point(s)?

Rgds

David M0TGC

Re: Radar Interference on 23cm

Keith Le Boutillier
 

Hi Andy

 

Your information on the location and QinetiQ site makes sense if they are testing radar systems.

 

I mentioned Galileo as I believe that some tests are being undertaken that use  a Frequency 1278.750 MHz and a Bandwidth 40.92 MHz which is also on my beam heading.

Whilst no expert here whatever is causing this is starting to make 23cm unusable at times.

 

Thanks again for the info

 

73 Keith GU6EFB

 

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Andy G4JNT
Sent: 06 June 2019 20:59
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Radar Interference on 23cm

 

DGPS wouldn't be using  L-Band transmissions

Your ref. to the Solent / Portsmouth area is pertinent.  There will have been some intense EW and CEW activity recently  

 

I live almost LOS to Portsdown Hill, overlooking Portsmouth, 18km,  where QinetiQ have their land based test site, and a complete mockup of the type 45  with its Sampson radar.   On normal working days, if I have a 1296 Rx running there is a huge blast of radar noise every few of seconds.    This radar is now in service - is is a  very powerful phased array one, scanning and able to track 1000 supersonic targetsat  simultaneously (so I was told, I'm not a RADAR expert)

 

 

 

On Thu, 6 Jun 2019 at 20:49, Keith Le Boutillier via Groups.Io <gu6efb=cwgsy.net@groups.io> wrote:

Hi Guys

I had real problems with radar type interference on 23 down here in GU, this was coming from a beam heading towards the south cost of the UK Pool / Portsmouth way.

I can't find it right this moment but have read about tests for the Galileo Satellite Navigation System using land based Differential type GPS transmitter could this be the source?

73 Keith GU6EFB

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Phil Guttridge G3TCU
Sent: 06 June 2019 17:36
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Radar Interference on 23cm

Hi Mike,

This map is still there: https://www.microwavers.org/maps/radars3.htm

I've found much  the same increase in noise at 23cm from IO91RF, my
usual local portable site. I recently put a PE1RKI filter before my
mast-head pre-amp to see if it was out-of-band stuff but it made no
significant different. I don't think it is all radar.
The increase in noise is partly why we went to IO91GI for the 'Low
Bands' as M0HNA/P last last Sunday. Blissfully quiet from there. Radar
detectable in some directions but too low a level to be a problem.

I'll be interested to hear if you draw any conclusions about where it's
coming from.

73, Phil G3TCU



On 06/06/2019 17:09, mike G6TRM via Groups.Io wrote:
> Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near  to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
> It has got much worse recently, make the band unusable at times.
>
> Regards
>
> Mike G6TRM
>
>
>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>







Re: Radar Interference on 23cm

Andy G4JNT
 

The Galileo satellite system transmits DOWN at 1278MHz using spread spectrum, so unless you have a pointy antenna you will not hear that signal.   That is the E6 signal someone referred to here earlier, and will not, itself ,have been causing QRM issues.    Of course, it may be possible someone was doing testing in the presence of local interferers, jammers etc, and that was what, ISTR,  the Kent station observed and blamed on E6 testing 

An illustration of its frequencies here:

There are plenty of radar signals in the L - S band part of the spectrum, as well as cellphone signals and a few point to poin t links, so there's always the possibiity of intermod products, if you don't have good filtering-out of strong signals

 


On Fri, 7 Jun 2019 at 09:03, Keith Le Boutillier via Groups.Io <gu6efb=cwgsy.net@groups.io> wrote:

Hi Andy

 

Your information on the location and QinetiQ site makes sense if they are testing radar systems.

 

I mentioned Galileo as I believe that some tests are being undertaken that use  a Frequency 1278.750 MHz and a Bandwidth 40.92 MHz which is also on my beam heading.

Whilst no expert here whatever is causing this is starting to make 23cm unusable at times.

 

Thanks again for the info

 

73 Keith GU6EFB

 

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Andy G4JNT
Sent: 06 June 2019 20:59
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Radar Interference on 23cm

 

DGPS wouldn't be using  L-Band transmissions

Your ref. to the Solent / Portsmouth area is pertinent.  There will have been some intense EW and CEW activity recently  

 

I live almost LOS to Portsdown Hill, overlooking Portsmouth, 18km,  where QinetiQ have their land based test site, and a complete mockup of the type 45  with its Sampson radar.   On normal working days, if I have a 1296 Rx running there is a huge blast of radar noise every few of seconds.    This radar is now in service - is is a  very powerful phased array one, scanning and able to track 1000 supersonic targetsat  simultaneously (so I was told, I'm not a RADAR expert)

 

 

 

On Thu, 6 Jun 2019 at 20:49, Keith Le Boutillier via Groups.Io <gu6efb=cwgsy.net@groups.io> wrote:

Hi Guys

I had real problems with radar type interference on 23 down here in GU, this was coming from a beam heading towards the south cost of the UK Pool / Portsmouth way.

I can't find it right this moment but have read about tests for the Galileo Satellite Navigation System using land based Differential type GPS transmitter could this be the source?

73 Keith GU6EFB

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Phil Guttridge G3TCU
Sent: 06 June 2019 17:36
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Radar Interference on 23cm

Hi Mike,

This map is still there: https://www.microwavers.org/maps/radars3.htm

I've found much  the same increase in noise at 23cm from IO91RF, my
usual local portable site. I recently put a PE1RKI filter before my
mast-head pre-amp to see if it was out-of-band stuff but it made no
significant different. I don't think it is all radar.
The increase in noise is partly why we went to IO91GI for the 'Low
Bands' as M0HNA/P last last Sunday. Blissfully quiet from there. Radar
detectable in some directions but too low a level to be a problem.

I'll be interested to hear if you draw any conclusions about where it's
coming from.

73, Phil G3TCU



On 06/06/2019 17:09, mike G6TRM via Groups.Io wrote:
> Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near  to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
> It has got much worse recently, make the band unusable at times.
>
> Regards
>
> Mike G6TRM
>
>
>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>







QO-100

David M0TGC
 

Hi

I am new to microwave and have just completed a set-up to work through QO-100.  I have a few questions that I am sure this group can help me with.  First the setup:

Single 80cm dish with Patch antenna (home brew, as written up by Paul M0EYT).
Octagon LNB, PLL but no external reference
SDR-Play RSP1a using SDR-Console V3.09
Yaesu FT857D at 2w into SG-Labs tr2300 (430MHz to 2.4GHz).

The LNB rifts quite a bit but the compensator built in to SDR-Console is coping, at least for SSB.  I doubt data modes would work but have not tried so far.

The QO-100 CW beacon gives s9 o s9+20 db, is that "normal"

I have no idea if the Patch is resonant around 2.4GHz but my CW signal is strong and clear.

How can I measure the resonance?  The transverter has a forward/ref voltage output and I thought of using that with a pico pc oscilloscope but I am not sure if that would work.

I have had a couple of qso's (using a 60cm dish) and reports given were 5/3 with good audio.  However, when I listen to my own audio it sounds distorted, could the transmit be affecting the receive somehow?

This sounds a bit rambling, apologies.

Thanks

David M0TGC

Re: Laser cut QO-100 patch parts

Richard <richard@...>
 

David , did you get any interest shown on your previous mail ?
I could be interested as I will have my new dish later next month
73 Richard


On Sat, 2019-05-25 at 06:38 -0700, Davidfpearson via Groups.Io wrote:
 

I was working on a patch antenna for qo-100 and thought ‘there has to be a better way’...

if we get enough, could probably get these for about £12. 
-- 
 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: Laser cut QO-100 patch parts

David M0TGC
 

@David Pearson - Yes please.

Thanks

David M0TGC

Re: QO-100

Neil Smith G4DBN
 

Hi David, the patch should have a couple of dips in the return loss, but they will probably be outside of the range you can measure using the rig and transverter.  I used a signal generator set to sweep mode and a directional coupler, and watched the output on my ancient spectrum analyser.  A manual signal source with a reflected power indicator like in your transverter would also work, but you can get decent enough directional couplers for £20 or so The return loss of the patch I just made looked like this, the dips are about +-40MHz:

If you have some sort of simple signal generator covering the 2-3GHz range, you could use a directional coupler made from a bit of PCB, with a Schottky diode detector and a meter to map out the response, but really, all that matters is that the SWR/return loss is acceptable, and that when you rotate the thing, your signal at the satellite doesn't change much.  If the voltage on the reflected power detector is a lot lower than the forward power voltage, and the satellite hears you with a couple of watts, I wouldn't bother trying to optimise it any further.

Neil G4DBN


On 07/06/2019 11:12, David M0TGC wrote:
Hi

I am new to microwave and have just completed a set-up to work through QO-100.  I have a few questions that I am sure this group can help me with.  First the setup:

Single 80cm dish with Patch antenna (home brew, as written up by Paul M0EYT).
Octagon LNB, PLL but no external reference
SDR-Play RSP1a using SDR-Console V3.09
Yaesu FT857D at 2w into SG-Labs tr2300 (430MHz to 2.4GHz).

The LNB rifts quite a bit but the compensator built in to SDR-Console is coping, at least for SSB.  I doubt data modes would work but have not tried so far.

The QO-100 CW beacon gives s9 o s9+20 db, is that "normal"

I have no idea if the Patch is resonant around 2.4GHz but my CW signal is strong and clear.

How can I measure the resonance?  The transverter has a forward/ref voltage output and I thought of using that with a pico pc oscilloscope but I am not sure if that would work.

I have had a couple of qso's (using a 60cm dish) and reports given were 5/3 with good audio.  However, when I listen to my own audio it sounds distorted, could the transmit be affecting the receive somehow?

This sounds a bit rambling, apologies.

Thanks

David M0TGC

Re: Radar Interference on 23cm

Graham G3TCT
 

Hi all

I have also experienced severe interference on 23cm at times from here in Somerset. The interference is a crackly wide band noise which is only a little reduced by the noise blanker. It's quite different from the regular ping from a conventional ATC radar. My qrm can be regular every second or so, or it can disappear for 10s of seconds, or it can be continuous for 10 seconds or so. This made me think it was a phased array radar, but I haven't confirmed this. It peaks about 050degrees from here, but audible all the way from north through to east, the important directions!! It might be ground scatter (clutter) returns if it is a radar.

One thing I tried was switching to AM and putting the audio through spectrumlab - this revealed a peak at 1kHz which was also audible. Like others, an extra filter at 1296 made no difference.

73
Graham

Re: Laser cut QO-100 patch parts

David Pearson
 

Hi Richard,

Only limited interest I’m afraid. There’s a price break at 10+ which brings the price down to a reasonable point but not much take up. 

Apologies to the three people who have written to me, work has been rather busy for me over the last few weeks

Regards
Dave


On 7 Jun 2019, at 11:26, Richard <richard@...> wrote:

David , did you get any interest shown on your previous mail ?
I could be interested as I will have my new dish later next month
73 Richard


On Sat, 2019-05-25 at 06:38 -0700, Davidfpearson via Groups.Io wrote:
<36FFE0D0-6DDE-44B8-895B-A20CC0813B2E.jpeg> 

I was working on a patch antenna for qo-100 and thought ‘there has to be a better way’...

if we get enough, could probably get these for about £12. 
-- 
 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: Laser cut QO-100 patch parts

Richard <richard@...>
 

That's a shame Dave
Those three plus another two gets half way, but that's the nature of this list unfortunately.
I'm not in too much of a hurry, let me know if you get up to the 10 to get a price break.
73
Richard


On Fri, 2019-06-07 at 20:28 +0100, David Pearson via Groups.Io wrote:
Hi Richard,

Only limited interest I’m afraid. There’s a price break at 10+ which brings the price down to a reasonable point but not much take up. 

Apologies to the three people who have written to me, work has been rather busy for me over the last few weeks

Regards
Dave


On 7 Jun 2019, at 11:26, Richard <richard@...> wrote:

David , did you get any interest shown on your previous mail ?
I could be interested as I will have my new dish later next month
73 Richard


On Sat, 2019-05-25 at 06:38 -0700, Davidfpearson via Groups.Io wrote:
<36FFE0D0-6DDE-44B8-895B-A20CC0813B2E.jpeg> 

I was working on a patch antenna for qo-100 and thought ‘there has to be a better way’...

if we get enough, could probably get these for about £12. 
-- 
 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
 ######################################################################

-- 
 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: Laser cut QO-100 patch parts

Conrad, PA5Y
 

I’ll have one if you can ship it to the Netherlands.

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of David Pearson via Groups.Io
Sent: 07 June 2019 21:28
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Laser cut QO-100 patch parts

 

Hi Richard,

 

Only limited interest I’m afraid. There’s a price break at 10+ which brings the price down to a reasonable point but not much take up. 

 

Apologies to the three people who have written to me, work has been rather busy for me over the last few weeks

 

Regards

Dave

 


On 7 Jun 2019, at 11:26, Richard <richard@...> wrote:

David , did you get any interest shown on your previous mail ?

I could be interested as I will have my new dish later next month

73 Richard

 

 

On Sat, 2019-05-25 at 06:38 -0700, Davidfpearson via Groups.Io wrote:

<36FFE0D0-6DDE-44B8-895B-A20CC0813B2E.jpeg> 

I was working on a patch antenna for qo-100 and thought ‘there has to be a better way’...

if we get enough, could probably get these for about £12. 

-- 

 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: Laser cut QO-100 patch parts

David M0TGC
 

If it helps the numbers I'll have two sets.

73's

David

Re: QO-100

David M0TGC
 

I have measured the forward and reflected voltages from the pins in the transverter and the swr is about 1.6 across the nb transponder so I should leave it as is.  I'd like to get a bit more power but will wait and see.  I have installed a 80cm dish now and get 5/6-7 reports.

I think my own signal distortion issue is nonsense, it is just that my transmissions and that of my responder are not on exactly the same frequency.  I'll try a second tuner on the sdr and swap audio when I press PTT.

Thanks for your help.

David

Re: Laser cut QO-100 patch parts

Chris G3WIE
 

I would also like two sets. Thanks for offering to do the hard work, I know what it's like...

73 Chris G3WIE

Re: Laser cut QO-100 patch parts Oreder for 2

militaryoperator
 

Dave
 

I'll take 2 sets as well please. 
Sounds easier than all that messing with my Dremel again, hi. 

Ben G4BXD

Re: Laser cut QO-100 patch parts

David Pearson
 

Ok, it seems we have enough to do this. I’ll place order this morning.

Please could I ask that you contact me directly so that we don’t clog up the form here and it also helps me collate email addresses.

Just to be clear, this is for the two plates - reflector and driven element for 2.4GHz patch as described in AMSAT de article and quite a few other online blogs


Material will be 0.9mm brass for both elements which I have found is structurally no problem for an N-type


Best 73
Dave



On 8 Jun 2019, at 07:58, Chris G3WIE <g3wie@...> wrote:

I would also like two sets. Thanks for offering to do the hard work, I know what it's like...

73 Chris G3WIE

Re: Laser cut QO-100 patch parts

Mike Willis
 

I'm interested too as I need another one. Why not bring some along to the RAL RT next weekend?
--
Mike G0MJW

Re: Laser cut QO-100 patch parts

Andy G4JNT
 

It's in Dubus now. latest edition



Virus-free. www.avg.com


On Sat, 8 Jun 2019 at 08:43, David Pearson via Groups.Io <Davidfpearson=googlemail.com@groups.io> wrote:
Ok, it seems we have enough to do this. I’ll place order this morning.

Please could I ask that you contact me directly so that we don’t clog up the form here and it also helps me collate email addresses.

Just to be clear, this is for the two plates - reflector and driven element for 2.4GHz patch as described in AMSAT de article and quite a few other online blogs


Material will be 0.9mm brass for both elements which I have found is structurally no problem for an N-type


Best 73
Dave



On 8 Jun 2019, at 07:58, Chris G3WIE <g3wie@...> wrote:

I would also like two sets. Thanks for offering to do the hard work, I know what it's like...

73 Chris G3WIE