Date   

Re: 2320 PA Modifications?

Colin Ranson
 

Hi Ben,

 

I use an Amphenol 316-10744-3 24v..... non latching,  or similar are sometimes available on e-bay.

 

I also use one on my 2m/70cm and 23cm pallets.   I came across a few in an closed down Home Office TX site.

 

 

Best regards

 

Colin de G8LBS

 

Sent from Mail for Windows 10

 

From: militaryoperator via groups.io
Sent: 29 October 2020 19:40
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 2320 PA Modifications?

 

 

 

What are folk using for their antenna switching on these amps? 

 

I only have SMA type which I think are not capable of 150W or so at 2.3Ghz, or at least not advisable?

 

Ben














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

Curator, Owner and Display coordinator

Military Wireless Museum

Kidderminster, UK.

 

This message was meant for the recipient

Any likeness to persons living or dead is odd

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Re: Now for latching relays ...

Pete - GM4BYF
 

I use an arduino set up to drive latching relays. Many latching relays do draw current after being latched, so a pulse is needed - otherwise they can eventually fail. Arduino relays are cheap and very effective. You can set up the length of pulse very easily by programming.

73
Pete GM4BYF
On 29/10/20 19:46, Steve G4HTZ via groups.io wrote:

I use these from w6PQL for driving the latching 26ghz latching 12v  relays that were ...maybe still available on eBay ...can be used with 24/28v relays as well 

http://www.w6pql.com/latching_relay_driver.htm


Steve G4HTZ 
JO01JN60
Great Wakering, Essex 
24ghz 1.8w 80cm dish 

also known to be active occasionally on 70cms DATV 


--
vry 73
Pete GM4BYF


Re: Now for latching relays ...

Steve G4HTZ
 

I use these from w6PQL for driving the latching 26ghz latching 12v  relays that were ...maybe still available on eBay ...can be used with 24/28v relays as well 

http://www.w6pql.com/latching_relay_driver.htm


Steve G4HTZ 
JO01JN60
Great Wakering, Essex 
24ghz 1.8w 80cm dish 

also known to be active occasionally on 70cms DATV 


Re: 2320 PA Modifications?

militaryoperator
 



What are folk using for their antenna switching on these amps? 

I only have SMA type which I think are not capable of 150W or so at 2.3Ghz, or at least not advisable?

Ben














--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.

This message was meant for the recipient
Any likeness to persons living or dead is odd
---------------------------------------


Re: Now for latching relays ...

militaryoperator
 

The problem with latching relays is they need the "24v" pulse in both directions. This circuit does not have a rest time to recharge the cap and send the pulse to the latching relay.
Some sort of circuit is need to isolate the output after it has pulsed the relay into one position so it can recharge ready for changing the relay to the other position.

Nick G0HIK


Do the relays still pull current once latched?  The ones I have dont. I have a Chinese unit 12 to 28, and a relay switched by ptt, center to 28v, NO and NC to latches  (NC to rx obviously).

Ben


Re: Now for latching relays ...

Nick Gregory G0HIK
 

No it's a dual coils, maybe I didn't explain it very well.

But as you say a step up will be simpler.

Is there a drive circuit for a dual coil relay.

I presume I need to use the tell tale contacts to inhibit TX if the relay fail to transfer.

https://www.mouser.co.uk/Teledyne-Relays/Electromechanical/Switches/Coaxial-Switches/CCS-37S-Series/Datasheets/_/N-19ebq?P=1y9bn5wZ1z0zl30

Nick G0HIK


Re: Now for latching relays ...

Andy G4JNT
 

Ah, a single coil latching must be a real pain.   That's why so many use dual coils I guess.
Will ponder - gut reaction says a simple solution should be possible.
Although I think I'd take the easy solution and just use a step up PSU



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On Thu, 29 Oct 2020 at 19:16, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote:
Hi Andy,

Thanks for that, Figure 2 is similar to the circuit that I use. I'll save that Radcom Page though.

The problem with latching relays is they need the "24v" pulse in both directions. This circuit does not have a rest time to recharge the cap and send the pulse to the latching relay.
Some sort of circuit is need to isolate the output after it has pulsed the relay into one position so it can recharge ready for changing the relay to the other position.

Nick G0HIK


Re: Now for latching relays ...

Nick Gregory G0HIK
 

Hi Andy,

Thanks for that, Figure 2 is similar to the circuit that I use. I'll save that Radcom Page though.

The problem with latching relays is they need the "24v" pulse in both directions. This circuit does not have a rest time to recharge the cap and send the pulse to the latching relay.
Some sort of circuit is need to isolate the output after it has pulsed the relay into one position so it can recharge ready for changing the relay to the other position.

Nick G0HIK


Re: Now for latching relays ...

Andy G4JNT
 

If that's what you mean, D-Noes July 2014, down from RSGB

(and that took some searching,  RSGB archive of RadCom are a nightmare - terrible website generally)



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On Thu, 29 Oct 2020 at 18:55, Andy Talbot <andy.g4jnt@...> wrote:
What diagram?
Do you mean the voltage doubling idea?



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On Thu, 29 Oct 2020 at 18:49, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote:
HI Andy,

Could you post the diagram again please, if you still have it.

I've found a CS37 relay in my stock, it's a bit too good for 2.4g, but it's available.

Many Thanks

Nick G0HIK


Re: Now for latching relays ...

Nick Gregory G0HIK
 

Well sort of, I thought that it also contained a circuit to drive the relay as well as the doubling.

I've got a great circuit that I've used several times that produces the boost. I thought you might have included a one shot pulse to trigger the relay in the circuit, but maybe not ?

Nick G0HIK


Re: Now for latching relays ...

Andy G4JNT
 

What diagram?
Do you mean the voltage doubling idea?



Virus-free. www.avg.com


On Thu, 29 Oct 2020 at 18:49, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote:
HI Andy,

Could you post the diagram again please, if you still have it.

I've found a CS37 relay in my stock, it's a bit too good for 2.4g, but it's available.

Many Thanks

Nick G0HIK


Re: Now for latching relays ...

Nick Gregory G0HIK
 

HI Andy,

Could you post the diagram again please, if you still have it.

I've found a CS37 relay in my stock, it's a bit too good for 2.4g, but it's available.

Many Thanks

Nick G0HIK


Re: Commercially made Yagi for 2.3 & 3.4GHz

Colin Ranson
 

Andy,

 

Wimo make flat plates for 2.4 GHz, I tried mine on QO-100, could not get much of a signal in.

 

Regards,

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 29 October 2020 14:13
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Commercially made Yagi for 2.3 & 3.4GHz

 

For 3.4GHz you may do better with a flat plate antenna.   

30cm square, gain ~ 21dBi  

Not sure if you can get them for 2.3GHz

 

Andy

 

 

 

Virus-free. www.avg.com

 

On Thu, 29 Oct 2020 at 14:04, Andy GD1MIP <gd1mip@...> wrote:

Folks,  I have now got transverters running for 13cm and 9cm.  I have successfully used them with small PCB yagi's. My ultimate goal is to make a feed to a NOS 1.2m Andrew dish sitting in my shed, mount it on a trailer and go /P. A real winter project.

But for now a quick option would be premade yagi's centred around 2320.200MHz  and 3400.100 MHz. 
Can anyone recommend a company producing yagi's of at least 30 elements?

Thanks Andy GD1MIP

 


Re: 122?

Robin Szemeti - G1YFG
 

The forum Andy mentioned is for a completely different project to the one I am interested in.

The one I am interested in is by David Minchin, VK5KK and was featured on the front of a Dubus earlier in the year.  It looks like this:

image.png

I think David has boards and is ready to release, but I understand he is rather busy with work and I have pestered him a few times already, I don't want to pester him again.


On Thu, 29 Oct 2020 at 18:02, Paul G8KFW <paul@...> wrote:

Hi Andy

 

Could you explain G4JNT   Yep, totally different project

 

Ad com back with information about the other 122 Ghz project

 

Best regards Paul

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Robin Szemeti - G1YFG
Sent: 29 October 2020 15:27
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 122?

 

@G4JNT   Yep, totally different project.

 

On Thu, 29 Oct 2020 at 15:10, Andy G4JNT <andy.g4jnt@...> wrote:

 

Virus-free. www.avg.com

 

On Thu, 29 Oct 2020 at 14:53, Robin Szemeti - G1YFG <robin@...> wrote:

I had been holding out for David Minchin's 122GHz thing, but I am not sure what's become of that. It looked excellent in Dubus and I think would be my preferred solution for 122GHz,  I think it is getting closer, but I think they keep tweaking it, so it's not got nearer a release yet.  There is probably a group or forum for it, but I've not managed to locate it yet.

 

 

On Thu, 29 Oct 2020 at 14:08, John Quarmby via groups.io <g3xdy=btinternet.com@groups.io> wrote:

The following will appear in Scatterpoint shortly:

A UK Microwave Group Online Lecture streamed by the BATC

Wednesday 11th November 2020 at 20:00

Chris Whitmarsh G0FDZ will be presenting his guide to the millimetre waves in this online talk. He will cover all aspects of the millimetre bands including users, propagation, antennas and feeders, basic equipment for each band to 241 GHz and beyond, and finish with mentioning the use of SDR for identifying weak signals.

There should be something in the talk for everyone from beginner on the millimetre bands to expert. However, there is no heavy maths or theory to blow your mind!

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 9th December 2020 in your diary for the next talk in this series.

73

John G3XDY

UKuG Secretary

On 29/10/2020 09:58, militaryoperator via groups.io wrote:

There was mention of some zoom or such on  using 122Ghz soon. 

 

Where and when?

 

 

Ben

 

 

 

 

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

Curator, Owner and Display coordinator

Military Wireless Museum

Kidderminster, UK.

 

This message was meant for the recipient

Any likeness to persons living or dead is odd

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

 

 

Virus-free. www.avast.com


--
Robin Szemeti - G1YFG


--
Robin Szemeti - G1YFG

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


--
Robin Szemeti - G1YFG


Re: 122?

Andy G4JNT
 

Oh.   
I glanced at that article in Dubus, thought "it's the same as the other one" so didn't bother looking at it.
Must go back and read it now.



Virus-free. www.avg.com


On Thu, 29 Oct 2020 at 18:02, Paul G8KFW <paul@...> wrote:

Hi Andy

 

Could you explain G4JNT   Yep, totally different project

 

Ad com back with information about the other 122 Ghz project

 

Best regards Paul

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Robin Szemeti - G1YFG
Sent: 29 October 2020 15:27
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 122?

 

@G4JNT   Yep, totally different project.

 

On Thu, 29 Oct 2020 at 15:10, Andy G4JNT <andy.g4jnt@...> wrote:

 

Virus-free. www.avg.com

 

On Thu, 29 Oct 2020 at 14:53, Robin Szemeti - G1YFG <robin@...> wrote:

I had been holding out for David Minchin's 122GHz thing, but I am not sure what's become of that. It looked excellent in Dubus and I think would be my preferred solution for 122GHz,  I think it is getting closer, but I think they keep tweaking it, so it's not got nearer a release yet.  There is probably a group or forum for it, but I've not managed to locate it yet.

 

 

On Thu, 29 Oct 2020 at 14:08, John Quarmby via groups.io <g3xdy=btinternet.com@groups.io> wrote:

The following will appear in Scatterpoint shortly:

A UK Microwave Group Online Lecture streamed by the BATC

Wednesday 11th November 2020 at 20:00

Chris Whitmarsh G0FDZ will be presenting his guide to the millimetre waves in this online talk. He will cover all aspects of the millimetre bands including users, propagation, antennas and feeders, basic equipment for each band to 241 GHz and beyond, and finish with mentioning the use of SDR for identifying weak signals.

There should be something in the talk for everyone from beginner on the millimetre bands to expert. However, there is no heavy maths or theory to blow your mind!

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 9th December 2020 in your diary for the next talk in this series.

73

John G3XDY

UKuG Secretary

On 29/10/2020 09:58, militaryoperator via groups.io wrote:

There was mention of some zoom or such on  using 122Ghz soon. 

 

Where and when?

 

 

Ben

 

 

 

 

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

Curator, Owner and Display coordinator

Military Wireless Museum

Kidderminster, UK.

 

This message was meant for the recipient

Any likeness to persons living or dead is odd

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

 

 

Virus-free. www.avast.com


--
Robin Szemeti - G1YFG


--
Robin Szemeti - G1YFG

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


Re: Commercially made Yagi for 2.3 & 3.4GHz

Stuart G1ZAR
 

The Directive Systems ones are centered on 3.456 GHz which is a way from our allocation. Would they need any tweaking for UK use?

Stuart
G1ZAR


Re: 122?

Paul G8KFW
 

Hi Andy

 

Could you explain G4JNT   Yep, totally different project

 

Ad com back with information about the other 122 Ghz project

 

Best regards Paul

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Robin Szemeti - G1YFG
Sent: 29 October 2020 15:27
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 122?

 

@G4JNT   Yep, totally different project.

 

On Thu, 29 Oct 2020 at 15:10, Andy G4JNT <andy.g4jnt@...> wrote:

 

Virus-free. www.avg.com

 

On Thu, 29 Oct 2020 at 14:53, Robin Szemeti - G1YFG <robin@...> wrote:

I had been holding out for David Minchin's 122GHz thing, but I am not sure what's become of that. It looked excellent in Dubus and I think would be my preferred solution for 122GHz,  I think it is getting closer, but I think they keep tweaking it, so it's not got nearer a release yet.  There is probably a group or forum for it, but I've not managed to locate it yet.

 

 

On Thu, 29 Oct 2020 at 14:08, John Quarmby via groups.io <g3xdy=btinternet.com@groups.io> wrote:

The following will appear in Scatterpoint shortly:

A UK Microwave Group Online Lecture streamed by the BATC

Wednesday 11th November 2020 at 20:00

Chris Whitmarsh G0FDZ will be presenting his guide to the millimetre waves in this online talk. He will cover all aspects of the millimetre bands including users, propagation, antennas and feeders, basic equipment for each band to 241 GHz and beyond, and finish with mentioning the use of SDR for identifying weak signals.

There should be something in the talk for everyone from beginner on the millimetre bands to expert. However, there is no heavy maths or theory to blow your mind!

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 9th December 2020 in your diary for the next talk in this series.

73

John G3XDY

UKuG Secretary

On 29/10/2020 09:58, militaryoperator via groups.io wrote:

There was mention of some zoom or such on  using 122Ghz soon. 

 

Where and when?

 

 

Ben

 

 

 

 

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

Curator, Owner and Display coordinator

Military Wireless Museum

Kidderminster, UK.

 

This message was meant for the recipient

Any likeness to persons living or dead is odd

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

 

 

Virus-free. www.avast.com


--
Robin Szemeti - G1YFG


--
Robin Szemeti - G1YFG

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


Re: 10Ghz last night

John Lemay
 

David

 

Thanks for the nice report. I guess the 20dB difference in power at each end explains my failure to hear you. A couple of points come to mind:-

 

…… Starting the contacts with dots or a carrier works well if the signals are not expected to be strong

 

…… The above is even more helpful if SDR or an audio waterfall is in use because it will show signals that are not yet audible – it’s really tricky beaming up on something you cannot hear.

 

…… As you were receiving a strong signal from me, it may have been difficult to find the optimum dish heading – which you would need so that I might hear you. Some radios, where each bit of the S meter represent many dB are particularly unhelpful in this matter.

 

That’s three points – I’ll only invoice you for two !

 

Importantly, don’t be put off by one failure between us. Conditions will change and it’s only a matter of time.

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of david656179 via groups.io
Sent: 28 October 2020 23:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 10Ghz last night

 

I also extend my thanks to all who tried last night in what was my first 10 Ghz nb experience.  I was QRP with just 100mW at the waveguide probe.  G4ZTR was a massive signal with me but he did not hear me.  I had good fortune to hook up with G4ODA before the contest and he kindly made me his first contact at the start of contest, he was also a massive signal.  After may tries via KST and fails, G4CLA took time out to work me, he started with CW and then to SSB because I am yet to master it.  He was loud but had heavy doppler and other distortions.  Leicester, GB3LEX was a consistent signal on two clear bearings the 20 deg off one was much stronger however.  Since visually this has clear take off for many miles and as others have said rain scatter disappeared before start of contest, it seemed to suggest a strong reflection more locally to the beacon site.  I took the fact that since I could hear this beacon my RX was acceptable.  GB3CAM as expected, was a massive signal and regardless of beam heading, could be heard all the time.

The bulk of the stations that I should have been able to work were obstructed by a copse of evergreen trees that only five years ago would not have been a problem.  I will have to find a new position on the ridge to avoid or I guess with the aid of aircraft or rain scatter could still work those directions.

I am very interested to read that under some circumstances NBFM can produce better results.  Meantime I am going to attempt a tune up of the PA's and more importantly improve the frequency stability, also stopping the frequency shift that was noted by G4ODA.  And I think a bigger dish, however the old PW wideband penny feed dish is so easy from a mechanical point of view.  So lots to do.

It would be considered foolish of me to go portable alone on such a cold and windy night, I will and am suffering for it, but as somebody else commented, strangely I enjoyed the experience.  Also I neither got stuck in the mud or put the car or myself into the ditch which is a bonus.

73 David G6KWA

So thanks again everybody, see you again on 10 Ghz.


Virus-free. www.avg.com


Re: 122?

Robin Szemeti - G1YFG
 

@G4JNT   Yep, totally different project.

On Thu, 29 Oct 2020 at 15:10, Andy G4JNT <andy.g4jnt@...> wrote:

Virus-free. www.avg.com

On Thu, 29 Oct 2020 at 14:53, Robin Szemeti - G1YFG <robin@...> wrote:
I had been holding out for David Minchin's 122GHz thing, but I am not sure what's become of that. It looked excellent in Dubus and I think would be my preferred solution for 122GHz,  I think it is getting closer, but I think they keep tweaking it, so it's not got nearer a release yet.  There is probably a group or forum for it, but I've not managed to locate it yet.


On Thu, 29 Oct 2020 at 14:08, John Quarmby via groups.io <g3xdy=btinternet.com@groups.io> wrote:

The following will appear in Scatterpoint shortly:

A UK Microwave Group Online Lecture streamed by the BATC

Wednesday 11th November 2020 at 20:00

Chris Whitmarsh G0FDZ will be presenting his guide to the millimetre waves in this online talk. He will cover all aspects of the millimetre bands including users, propagation, antennas and feeders, basic equipment for each band to 241 GHz and beyond, and finish with mentioning the use of SDR for identifying weak signals.

There should be something in the talk for everyone from beginner on the millimetre bands to expert. However, there is no heavy maths or theory to blow your mind!

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 9th December 2020 in your diary for the next talk in this series.

73

John G3XDY

UKuG Secretary

On 29/10/2020 09:58, militaryoperator via groups.io wrote:

There was mention of some zoom or such on  using 122Ghz soon. 

Where and when?


Ben





--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.

This message was meant for the recipient
Any likeness to persons living or dead is odd
---------------------------------------


Virus-free. www.avast.com


--
Robin Szemeti - G1YFG


--
Robin Szemeti - G1YFG


Re: 122?

Robin Szemeti - G1YFG
 

@Eric:  nope I have not seen your direct mails :(  I will go and check the spam.

On Thu, 29 Oct 2020 at 14:56, f1ghb <f1ghb@...> wrote:
Hello Robin,

Have you received my direct emails ?

Best 73s
Eric F1GHB

Le 29/10/2020 15:53, Robin Szemeti - G1YFG a écrit :
I had been holding out for David Minchin's 122GHz thing, but I am not sure what's become of that. It looked excellent in Dubus and I think would be my preferred solution for 122GHz,  I think it is getting closer, but I think they keep tweaking it, so it's not got nearer a release yet.  There is probably a group or forum for it, but I've not managed to locate it yet.


On Thu, 29 Oct 2020 at 14:08, John Quarmby via groups.io <g3xdy=btinternet.com@groups.io> wrote:

The following will appear in Scatterpoint shortly:

A UK Microwave Group Online Lecture streamed by the BATC

Wednesday 11th November 2020 at 20:00

Chris Whitmarsh G0FDZ will be presenting his guide to the millimetre waves in this online talk. He will cover all aspects of the millimetre bands including users, propagation, antennas and feeders, basic equipment for each band to 241 GHz and beyond, and finish with mentioning the use of SDR for identifying weak signals.

There should be something in the talk for everyone from beginner on the millimetre bands to expert. However, there is no heavy maths or theory to blow your mind!

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 9th December 2020 in your diary for the next talk in this series.

73

John G3XDY

UKuG Secretary

On 29/10/2020 09:58, militaryoperator via groups.io wrote:

There was mention of some zoom or such on  using 122Ghz soon. 

Where and when?


Ben





--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.

This message was meant for the recipient
Any likeness to persons living or dead is odd
---------------------------------------


Virus-free. www.avast.com

--
Robin Szemeti - G1YFG


--
Robin Szemeti - G1YFG

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