Date   

Re: SGLabs 3.4GHz delivery latest

Andy G4JNT
 

WHY WHY WHY ?
It's such a backward outlook




On Sun, 6 Dec 2020 at 21:28, Neil Smith G4DBN <neil@...> wrote:
On 06/12/2020 20:05, SAM JEWELL via groups.io wrote:

We are stuck with non-error-corrected modes in contests, .....


Re: SGLabs 3.4GHz delivery latest

Neil Smith G4DBN
 

On 06/12/2020 20:05, SAM JEWELL via groups.io wrote:
I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.

We are stuck with non-error-corrected modes in contests, but ISCAT might be possible for aircraft scatter on SHF. JT6M might work, but not if the spreading is more than 20 Hz. Very slow CW will probably be just about as good. Outside contests, JT9E/F or QRA64 are probably optimal.  Really we need a wide-spaced extras-slow mode which will work when there is a lot of scintillation from troposcatter, so symbols of at least 3 seconds long, preferably 5-10 s.

I'm a fan of visual modes on VLF, so DFCW or QRSS FSK would get my vote for troposcatter DX on 9/6/3 cm.

Under the very very flat conditions right now on 3cm, I'm able to resolve GB3PKT at 240 km quite well with a long FFT, but it is far too weak to decode using JT4G. 30 second symbols would give near-perfect copy and can be read by eye. OK, it isn't going to be fast enough for contesting, but while we are pushing the limits, it is worth a try.

I should be on 3.4 properly in a couple of weeks and looking for tests via troposcatter, rainscatter, aircraft scatter and ducting.  5.7 is proving to be a dead loss with all of the appalling rural broadband backhaul links around here.  I mean, we have dratted VDSL in the village, so why would anyone choose 5.8G backhaul? Just means that 6cm as well as 80/40/30 m are all made useless.

Everyone waiting for 3.4 horns from me, I have my rotary welding positioner sorted at last and should be churning Super-VE4MAs out now I can rotate them while TIG welding the joints. I have some larger-diameter Rexolite 1422 in stock, so I'll be making a few lensed horns for 5.6 GHz. As well as being sealed against the weather, they can be mounted very close to other feedhorns for anyone wanting to experiment with a cluster of monoband feeds which can be selected by nodding or turning the dish a few degrees. I have another twenty or so 122 GHz antennas to finish first though, and a pile of heat-spreaders....

Looking forward to working everyone who has a shiny new 3.4 G transverter.

Neil G4DBN

This is the trace from PKT on 3cm just now in Spectrum Lab.

and here is it in WSJT-X JT4G mode.

On 06/12/2020 20:05, SAM JEWELL via groups.io wrote:
I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.


73 de Sam




On 6 Dec 2020, at 19:39, ian hope (2E0IJH) <ian@...> wrote:


9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH
 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 

-- 
Neil
http://g4dbn.uk


Re: 3.4G feed horn dimensions ?

Nick Gregory G0HIK
 

On Sun, Dec 6, 2020 at 08:57 PM, militaryoperator wrote:
192858456314
Thanks Ben


Re: 3.4G feed horn dimensions ?

militaryoperator
 


ebay:  
192858456314



Subject: Re: [UKMicrowaves] 3.4G feed horn dimensions ?

Me also Ben,

Where do you get the copper tube from?

Nick G0HIK


Re: SGLabs 3.4GHz delivery latest

SAM JEWELL
 

As we know, Andy, the path between us works tolerably well, albeit with weak signals.
I am recovering from a shoulder problem. Once I have some strength back in my right arm, I will put something back on 9, be it the barefoot SGLabs, or the G2 Kuhne with PA.
Hopefully, fairly quickly.

73 de Sam



On 6 Dec 2020, at 20:13, Andy G4JNT <andy.g4jnt@...> wrote:


I'm still set up for that band after the last cumulative and can leave the antenna on the mast if someone wants to try for a JTxx  DX  KEWZO
I've got a reasonable take off to the NE from Near Southampton - especially now the trees have lost their leaves.



On Sun, 6 Dec 2020 at 20:05, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.


73 de Sam




On 6 Dec 2020, at 19:39, ian hope (2E0IJH) <ian@...> wrote:


9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH
 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell=btinternet.com@groups.io>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 


Re: 3.4G feed horn dimensions ?

Nick Gregory G0HIK
 

Once again, Thanks for the great info Neil.

Tried with GD1MIP a couple of times today, no joy yet. But I'm going to a 2000ft location tomorrow for another try, fingers crossed.

Nick G0HIK


Re: 3.4G feed horn dimensions ?

Nick Gregory G0HIK
 

Me also Ben,

Where do you get the copper tube from?

Nick G0HIK


Re: 3.4G feed horn dimensions ?

militaryoperator
 

uW’ers
 
Where does one acquire on of these white Chapparral thingys ?
 
Colin de G8LBS  ..... ....pondering different antennas for 9cm.


I got mine here:  113332867052


Ben


Re: SGLabs 3.4GHz delivery latest

ian hope (2E0IJH)
 

I normally have the 23 and 13 units,mast head mounted with the matching amps, so there's less than a metre of LMR 400 to the yagis, I have used the 23cm barefoot mast mounted, but found to get any further than essex across the water from gravesend I needed the amp, my QTH at gravesend is a little on the low side, 15 mins the other way you have wrotham area were Gb3VHF lives and totally different height
 
Ian
M5IJH

 
 
Sent: Sunday, December 06, 2020 at 8:05 PM
From: "SAM JEWELL via groups.io" <jewell@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.
 
 
73 de Sam
 
 
 
 
On 6 Dec 2020, at 19:39, ian hope (2E0IJH) <ian@...> wrote:
 

9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH
 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 


Re: SGLabs 3.4GHz delivery latest

Andy G4JNT
 

and did once work 'BAO using JT65C



On Sun, 6 Dec 2020 at 20:13, Andy Talbot <andy.g4jnt@...> wrote:
I'm still set up for that band after the last cumulative and can leave the antenna on the mast if someone wants to try for a JTxx  DX  KEWZO
I've got a reasonable take off to the NE from Near Southampton - especially now the trees have lost their leaves.



On Sun, 6 Dec 2020 at 20:05, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.


73 de Sam




On 6 Dec 2020, at 19:39, ian hope (2E0IJH) <ian@...> wrote:


9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH
 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell=btinternet.com@groups.io>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 


Re: SGLabs 3.4GHz delivery latest

Andy G4JNT
 

I'm still set up for that band after the last cumulative and can leave the antenna on the mast if someone wants to try for a JTxx  DX  KEWZO
I've got a reasonable take off to the NE from Near Southampton - especially now the trees have lost their leaves.



On Sun, 6 Dec 2020 at 20:05, SAM JEWELL via groups.io <jewell=btinternet.com@groups.io> wrote:
I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.


73 de Sam




On 6 Dec 2020, at 19:39, ian hope (2E0IJH) <ian@...> wrote:


9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH
 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell=btinternet.com@groups.io>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 


Re: SGLabs 3.4GHz delivery latest

SAM JEWELL
 

I think much depend on how much attention is paid antennas and cables.
With an efficient (effective) antenna, even a bare SGLabs 2.5W and 1.7dB noise figure, (very) close to the feed will give some pretty good results on 'normal' troposcatter and anything (within reason) goes in a lift.
Adding a PA to the basic transverter, together with an LNA, complicates matters such that many may be put off. Not to mention the possible cost.......
Hence my interest in what might be possible with the basic transverter and an efficient antenna.
The idea of using digital modulation may not appeal, but could be another way to further increase range.  Especially if we could find an effective method of using it to rival the use of narrow FT8 mode on VHF.  This would probably not suit the contest guys.


73 de Sam




On 6 Dec 2020, at 19:39, ian hope (2E0IJH) <ian@...> wrote:


9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH
 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 


Re: SGLabs 3.4GHz delivery latest

ian hope (2E0IJH)
 

9cm is somthing yet to dabble would be interested in your results, I have the 23 and 13cm SG labs units and the matching amps, but currently not active on them, until I replace the mast they were on, 
 
Ian
M5IJH

 
 
Sent: Sunday, December 06, 2020 at 7:18 PM
From: "SAM JEWELL via groups.io" <jewell@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SGLabs 3.4GHz delivery latest
Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.
 
73 de Sam, G4DDK
 
 
 
 
 
 
 
On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:
 


Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 


 

 

 

 


Re: SGLabs 3.4GHz delivery latest

SAM JEWELL
 

Colin,
It will be interesting to see how well it works over our 10-12km NLOS path with low/moderate power.
As far as I know, there is yourself, plus G3XDY and G4FSG locally. I am not sure G3LQR is operational any longer.
G4BAO is around 70km from me and I have worked him on 9cm a number of times, previously.
To the south, G4OGI in Kent, is active on 9cm. I am sure there are many others who are, are were, active within 100km of us.
Much, much, greater ranges are possible, of course, but it always helps to have someone local to test with, first.

73 de Sam, G4DDK







On 6 Dec 2020, at 18:55, Colin Ranson <g8lbs@...> wrote:



Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 



 

 


Re: 3.4G feed horn dimensions ?

Eddie G0EHV
 

Try eBay, “c band LNB”

Regards,
Eddie 
G0EHV 

Launched into the ether from my iPad 

On 6 Dec 2020, at 18:56, Colin Ranson <g8lbs@...> wrote:

uW’ers

 

Where does one acquire on of these white Chapparral thingys ?

 

Colin de G8LBS  ..... ....pondering different antennas for 9cm.

 

Sent from Mail for Windows 10

 

From: John Fell
Sent: 06 December 2020 15:02
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 3.4G feed horn dimensions ?

 

Nick,

The standard tin length is good enough - the probe point to the end short of the waveguide ( Tin can) is more important .

No doubt Peter's data will be fine .

The Chaparral flange addition is to enforce a better distribution  illumination of the dish surface for higher F/d ratio .

 

The open ended can without any flange addition will work fine with a near prime (0.25 F/d ratio ) reflector , which requires near to 90 degree feed angle .

 

An alternative , easier to make , flange is a Super VE4MA .This works well with dishes in  the 0.55 to 0.8F/d range , such as the majority of domestic  Sat dishes .It is also possible to adjust the flange position although the data given on the W1GHZ website is close enough to fix the position .

 

73/Seasons Greetings 

 

John

G0API

 

On Sun, 6 Dec 2020 at 14:34, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote:

The 9cm's SG-Labs arrived yesterday and I'm cant wait to get going.

I've found on the G3PHO site a "Soup Tin" feed horn.

I've copied it and the SWR is in the green straight away :)

But what length should I make the waveguide section, it is not mentioned in the article ?

And what does a Chaparral horn actually do ?

Nick G0HIK
 






<IMG_20201206_141909475.jpg><IMG_20201206_141924969.jpg>

 


Re: 3.4G feed horn dimensions ?

Colin Ranson
 

uW’ers

 

Where does one acquire on of these white Chapparral thingys ?

 

Colin de G8LBS  ..... ....pondering different antennas for 9cm.

 

Sent from Mail for Windows 10

 

From: John Fell
Sent: 06 December 2020 15:02
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 3.4G feed horn dimensions ?

 

Nick,

The standard tin length is good enough - the probe point to the end short of the waveguide ( Tin can) is more important .

No doubt Peter's data will be fine .

The Chaparral flange addition is to enforce a better distribution  illumination of the dish surface for higher F/d ratio .

 

The open ended can without any flange addition will work fine with a near prime (0.25 F/d ratio ) reflector , which requires near to 90 degree feed angle .

 

An alternative , easier to make , flange is a Super VE4MA .This works well with dishes in  the 0.55 to 0.8F/d range , such as the majority of domestic  Sat dishes .It is also possible to adjust the flange position although the data given on the W1GHZ website is close enough to fix the position .

 

73/Seasons Greetings 

 

John

G0API

 

On Sun, 6 Dec 2020 at 14:34, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote:

The 9cm's SG-Labs arrived yesterday and I'm cant wait to get going.

I've found on the G3PHO site a "Soup Tin" feed horn.

I've copied it and the SWR is in the green straight away :)

But what length should I make the waveguide section, it is not mentioned in the article ?

And what does a Chaparral horn actually do ?

Nick G0HIK
 






 


Re: SGLabs 3.4GHz delivery latest

Colin Ranson
 

Great stuff Sam !

 

Now engineering up a Hammond box here to match the other two SG-labs transverter and the Iceni.  It used to house a dual band Ukrainian transverter but the box was wasted on that ! I’ll pass that on to a local who can be bothered to use a proper mode.   Priority after that will be an ABS box tucked under the soffits on the shop side with amp/LNA in it

Beauty of 9cm is the smallness of antennas, I am going to try and re-engineer the 2.4GHz TP-Link feed for 9cm as one project, including getting the 73 ele QLY up. 

Father Xmas might bring me a suitable VNA soon as well.

 

Already mounted the supplied PCB antenna in the East facing window looking at you and John and Martleshambles.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: SAM JEWELL via groups.io
Sent: 06 December 2020 17:35
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] SGLabs 3.4GHz delivery latest

 

DPD are telling me my transverter will be delivered tomorrow.

Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.

Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.

The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.

Decisions........

Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.

I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

 

73 de Sam, G4DDK

 

 

 

 



 

 


Re: Modifying a POTY dish feed

Andrew G8TZJ
 

On Thu, Nov 26, 2020 at 09:45 AM, Mike Willis wrote:
What you have drawn looks good. It might benefit from a tuning screw.

Mike G0MJW
I assume that the tuning screw needs to go on the opposite side of the waveguide to the pick-up probe, with the pick-up probe being made slightly short? Should the screw be a steel or brass type?

73 Andrew G8TZJ


SGLabs 3.4GHz delivery latest

SAM JEWELL
 

DPD are telling me my transverter will be delivered tomorrow.
Now I have to decide whether to use this one on terrestrial or reuse the G2 Kuhne one, but with the new, external, LO to keep it from drifting.........drift was a real pain, previously.
Reusing the Kuhne does have the advantage that it has a 2m IF and is already suitably boxed with LNA power feed, sequencing, etc.
The disadvantage is that I have to reengineer the EME system for a 70cm IF, using the SGLabs one.
Decisions........
Whichever way I choose, I hope to have something operational around Christmas, even if only low powered, to work the locals........at least three within 10km. And a local beacon to listen to. Plenty of incentive.
I do have a suitable linear, LNA and high gain QLY! but I don't see these re-entering service for a while longer.

73 de Sam, G4DDK








UKuG Talk on NanoVNAs by G8DKK - 20:00 Wednesday 9th December

John Quarmby
 

A Comparison of NanoVNAs – By Bryan Harber G8DKK

A UK Microwave Group Online Lecture streamed by the BATC

Wednesday 9th December 2020 at 20:00

Bryan will be comparing with other Vector Network Analysers and looking at VNA architecture and calibration kits. The talk will be streamed on this URL:

https://batc.org.uk/live/ukmicrowave

We look forward to welcoming all to the talk.

Please put the 13th January 2021 in your diary for the next talk in this series.


73

John G3XDY
Secretary, UKuG


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