Date   

Re: DB6NT contact email?

Clive, G3GJA
 

Hi Noel

 

I got an email from info@... when I ordered my 23cm transverter.

 

Also try m.gruener@...

 

73

 

Clive G3GJA

 

From: ukmicrowaves@...
Sent: 19 September 2018 18:01
To: ukmicrowaves@...
Subject: [ukmicrowaves] DB6NT contact email?

 

 

Hi

Does anyone have a current email address for Kuhne Electronics?

I want to order a MKU LNA 243rx2 24GHz LNA for the Farnham microwave SDR but the website says lead time on request – but I cannot find a contact email anywhere on the site and I never got a reply from info@ which I found buried in a legal document on the site – not very customer friendly!

Also, does anyone know if the 100-kit24 with PCB15 is the PCB & semiconductors for the same amplifier but co-axial input? If yes, it looks good value at 40 euros.

73

Noel – G8GTZ

 

 

HESH Computer Services Limited Tel: (01482) 324936
12 Louis Pearlman Centre Web: www.hesh.co.uk
Goulton Street Registered in England No.: 3003479
Hull VAT No.: GB 647 3679 95
HU3 4DL

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Re: DB6NT contact email?

Keith Le Boutillier <keithl@...>
 

Hi Noel

 

Try

 

m.gruener@...

 

73 Keith GU6EFB

From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 19 September 2018 18:01
To: ukmicrowaves@...
Subject: [ukmicrowaves] DB6NT contact email?

 

 

Hi

Does anyone have a current email address for Kuhne Electronics?

I want to order a MKU LNA 243rx2 24GHz LNA for the Farnham microwave SDR but the website says lead time on request – but I cannot find a contact email anywhere on the site and I never got a reply from info@ which I found buried in a legal document on the site – not very customer friendly!

Also, does anyone know if the 100-kit24 with PCB15 is the PCB & semiconductors for the same amplifier but co-axial input? If yes, it looks good value at 40 euros.

73

Noel – G8GTZ

 

 


DB6NT contact email?

Noel G8GTZ
 

Hi

Does anyone have a current email address for Kuhne Electronics?

I want to order a MKU LNA 243rx2 24GHz LNA for the Farnham microwave SDR but the website says lead time on request – but I cannot find a contact email anywhere on the site and I never got a reply from info@ which I found buried in a legal document on the site – not very customer friendly!

Also, does anyone know if the 100-kit24 with PCB15 is the PCB & semiconductors for the same amplifier but co-axial input? If yes, it looks good value at 40 euros.

73

Noel – G8GTZ

 

 


Re: JVL Quad loop

Brian Howie GM4DIJ
 

On 18/09/2018 14:01, Andy Talbot andy.g4jnt@gmail.com [ukmicrowaves] wrote:
In all the documentation for this, and the on-line calculators, and 'JVL's original design programmes, nowhere have I seen a quoted gain. Or better, a gain vs. number of elements / length graph.
I have a couple of rather old 27 element ones for 1296MHz, and could try to measure the gain to see if they're still working OK, or corrosion has damaged the effectiveness.
But with no specified figure to check against ...
Andy
www.g4jnt.com <http://www.g4jnt.com>

I modelled one on MMANA and get 18.86dBi for the 27 element version. I've still got one I built in about 1976 and used it on the 23cm contest last night. It's very corroded; maybe that's why I didn't work much ;-) I've also a couple for 70cm.

I've also a 21 ele I built recently for 13cm and used an SG labs transverter plus a funcube dongle to measure the Noise Figure and Gain using ground and sun noise. The NF came out at 1.7dB and the gain about 17.5dBi. MMANA said about 17.6dBi, but it's easy to fool yourself.

You might be getting strange answers using the beacon, as you should be seeing ground gain as well at both ends. I don't know if can do the ground/sun test. I'd be interested in the results if you do.

As an aside I've been trying to reconcile Path Profile (and Radio Mobile) with ground effects on antenna gain, but not really getting anywhere.

73 Brian GM4DIJ


--
Brian


Re: WG16 Square Flange

g4uvz@...
 

Thanks Pau ..I think that I am sorted now...just need to finalise the new stand off brackets and get some calmer weather!



Re: WG18 Square Flange Sealing Rings

g4uvz@...
 

I am now sorted for the time being ...thank you Stuart


Re: WG16 Square Flange

Paul G8AQA
 

Hi Adrian,

You will need a choke only flange to mate with the flange shown as the 2 "O" ring grooves will not fit comfortably together. When you do get an "O" ring make sure you have the correct section. Rubber is incompressible so if it fills the groove completely when deformed then the metal parts will not make contact. I guess you know that 2 chokes should not face each other without a metal gasket.

Let me know exactly what you require and I will see what I can find. I should be able to find most bits including circular flanges.

73
Paul G8AQA


On 15/09/2018 15:14, g4uvz@... [ukmicrowaves] wrote:
 

As part of the next phase of the GB3KBQ rebuild I am hoping to raise the antenna a couple of metres to clear local vegetation. I have a couple of old square flanges but would ideally like to use a choked flange AND sealing rings..rather than silicon sealer!

I wonder if anyone has these items which they would be prepared to donate to the project?

See attached pictures of the size of sealing rings required.

Many thanks

Adrian G4UVZ Beacon Keeper GB3KBQ




Virus-free. www.avg.com


Re: JVL Quad loop

KENT BRITAIN
 

We have certainly measured over 100 of them on the Central States VHF Society
and Microwave Update antenna ranges.  But that information has never been organized.

WA5VJB/2E0VAA/G8EMY



From: "Andy Talbot andy.g4jnt@... [ukmicrowaves]"
To: "Ukmicrowaves (ukmicrowaves@...)"
Sent: Tuesday, September 18, 2018 8:01 AM
Subject: [ukmicrowaves] JVL Quad loop

 
In all the documentation for this, and the on-line calculators, and 'JVL's original design programmes, nowhere have I seen a quoted gain.  Or better, a gain vs. number of elements / length graph.

I have a couple of rather old 27 element ones for 1296MHz, and could try to measure the gain to see if they're still working OK, or corrosion has damaged the effectiveness.
But with no specified figure to check against ...





Re: JVL Quad loop

Andy G4JNT
 

Tnx.
They quote a 25 ele as 17dBi,  so my 27 ele probably is around 17dBi on a good day.

Well....  that IS interesting:
MJW_Profile suggests the path loss (local single diffraction) from G8MBU to me is -147dB

Beaconspot quotes 10W for the G8MBU Isle of Wight beacon, so 40dBm EIRP

-147dB + 17dBi  = -90dBm could reasonably be expected in the Rx at the 50% confidence level (or whatever the "percentage" value means on Mike programme)

The transverter has around +7dB net gain (ish,  It's the SG Labs one with no additional LNA or anything) and I just measured -84dBm at 144MHz IF out from that.

So pretty close I reckon !

I do like it when theory/prediction agrees with measurement.

On 18 September 2018 at 14:10, 'John Lemay' john@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Andy

 

Directive Systems in the US make them and you’ll see some quoted gains:-

 

https://directivesystems.com/1200-mhz/23-cm-1250-1300-mhz/

 

John G4ZTR

 

From: ukmicrowaves@... [mailto:ukmicrowaves@yahoogroups.com]
Sent: 18 September 2018 14:01
To: Ukmicrowaves (ukmicrowaves@...)
Subject: [ukmicrowaves] JVL Quad loop

 

 

In all the documentation for this, and the on-line calculators, and 'JVL's original design programmes, nowhere have I seen a quoted gain.  Or better, a gain vs. number of elements / length graph.

 

I have a couple of rather old 27 element ones for 1296MHz, and could try to measure the gain to see if they're still working OK, or corrosion has damaged the effectiveness..

But with no specified figure to check against ...

 

 



Re: JVL Quad loop

John Lemay
 

Andy

 

Directive Systems in the US make them and you’ll see some quoted gains:-

 

https://directivesystems.com/1200-mhz/23-cm-1250-1300-mhz/

 

John G4ZTR

 

From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 18 September 2018 14:01
To: Ukmicrowaves (ukmicrowaves@...)
Subject: [ukmicrowaves] JVL Quad loop

 

 

In all the documentation for this, and the on-line calculators, and 'JVL's original design programmes, nowhere have I seen a quoted gain.  Or better, a gain vs. number of elements / length graph.

 

I have a couple of rather old 27 element ones for 1296MHz, and could try to measure the gain to see if they're still working OK, or corrosion has damaged the effectiveness.

But with no specified figure to check against ...

 

 


JVL Quad loop

Andy G4JNT
 

In all the documentation for this, and the on-line calculators, and 'JVL's original design programmes, nowhere have I seen a quoted gain.  Or better, a gain vs. number of elements / length graph.

I have a couple of rather old 27 element ones for 1296MHz, and could try to measure the gain to see if they're still working OK, or corrosion has damaged the effectiveness.
But with no specified figure to check against ...



Re: WG18 Square Flange Sealing Rings

Stuart G1ZAR
 

I would guess they are standard O-rings obtainable from your local supply (see yellow pages?).
If you could also show the groove depth then this would determine what cross section is required.
might have some in stock, or could visit my supplier if you can't source anywhere else.

Stuart
G1ZAR


Re: WG16 Square Flange

Paul G8KFW
 

Hi regarding choke flanges how much power are you putting through the wave guide ?

as I do not think you will see the benefit of choke flanges

 

Regards Paul B

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 15 September 2018 21:04
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] WG16 Square Flange

 

 

Adrian

I will have a look in the loft, I may have some square sets.  I am pretty sure I have round flange sets  and I think I know where the rings could be obtained from.

Remember  to mate the  choke / o-ring flange to a plane flange. Never put 2 choke flanges together (without a  proper shim)

Regards

Mark GM4ISM

 

 

Sent: Saturday, September 15, 2018 3:14 PM

Subject: [ukmicrowaves] WG16 Square Flange

 

 

As part of the next phase of the GB3KBQ rebuild I am hoping to raise the antenna a couple of metres to clear local vegetation. I have a couple of old square flanges but would ideally like to use a choked flange AND sealing rings..rather than silicon sealer!

I wonder if anyone has these items which they would be prepared to donate to the project?

See attached pictures of the size of sealing rings required.

Many thanks

Adrian G4UVZ Beacon Keeper GB3KBQ

 

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Re: GB3CSB - CQ for Donation's !

David GM6BIG
 

Hi All,

While at the farm, I took the opportunity to pay Walter the electricity bill for GB3CSB.

A little earlier than usual, but hopefully that helped make up for being rather late last year...

As always, Walter's support and help is much appreciated, so its the electric bill, and a little extra as a thanks.

If anyone would like to donate towards the upkeep and running of GB3CSB you can send me donations using the details below, or get in touch.

For Paypal, send it to...
aware@freeuk.com

(Do not email me at that address though).

Or by post to..

David Anderson
20 Greenrig Rd
Hawksland
Lesmahagow
ML11 9QA

Unless you wish to remain anonymous, make sure you include your name and call, its not always obvious who has helped out !

Many Thanks for your support in the past.

BTW
The High RF Performance 10GHz beacon, the subject of a talk at the GM Round Table last year when it was still in "breadboard" form, is now all but complete, just some tidying of the software and the addition of some remote monitoring before going to site.


Cheers David GM6BIG.

On 16-Sep-18 21:30, David GM6BIG wrote:
Hi All,
There had been power company faults in the area with 11kV transformers failing, several times.
The farm, and much of the neighbourhood supported on power company generators while the worked on the 11kV network.
During this, a few RCD protected supplies at the farm were tripping, including the one supplying GB3CSB and other amateur radio gear.
I managed to get up last Tuesday to help investigate/fix. By the time I arrived, Walter GM8IIH, the farm owner, had done much of the work already. A few Neutral-Earth "leaky" items identified and disconnected.
Fingers crossed, power was restored on Tuesday, and so far still good - no more RCD trips.
Cheers, David GM6BIG
On 08-Sep-18 16:42, David GM6BIG wrote:
Hi All,

Just to let you know there is an electrical fault at the farm where GB3CSB beacon is located.

The supply to the beacon and other amateur equipment at the site is "currently" off.

It has only just happened, so not sure of any timescale yet, will keep you all posted...


73 David GM6BIG


Re: GB3CSB - ON air

David GM6BIG
 

Hi All,

There had been power company faults in the area with 11kV transformers failing, several times.
The farm, and much of the neighbourhood supported on power company generators while the worked on the 11kV network.

During this, a few RCD protected supplies at the farm were tripping, including the one supplying GB3CSB and other amateur radio gear.

I managed to get up last Tuesday to help investigate/fix. By the time I arrived, Walter GM8IIH, the farm owner, had done much of the work already. A few Neutral-Earth "leaky" items identified and disconnected.

Fingers crossed, power was restored on Tuesday, and so far still good - no more RCD trips.

Cheers, David GM6BIG

On 08-Sep-18 16:42, David GM6BIG wrote:
Hi All,
Just to let you know there is an electrical fault at the farm where GB3CSB beacon is located.
The supply to the beacon and other amateur equipment at the site is "currently" off.
It has only just happened, so not sure of any timescale yet, will keep you all posted...
73 David GM6BIG


Re: [test-equip-trader] Anritsu MG3693B rf connector

Chris Bartram <chris@...>
 

Roger wrote:

Does anyone have an 2.92 RF connector, for an Anritsu MG3693B signal generator?  Some kind person has just ruined mine, and Anritsu have quoted over $1000 for a replacement.
I can't help, even if I once thought I'd acquired a bag of 2.92mm free plugs. They weren't! However, Roger's appeal does highlight the high cost of coax connectors for the bands above 24GHz. My own 47GHz kit, once it's finished, will be firmly based on low-cost waveguide, utilising standard tube sizes, with coax interconnects being used below 18GHz.

73

Chris
G4DGU

--


Re: WG16 Square Flange

Adrian whatmore <g4uvz@...>
 

All understood Ed   I have a second length of guide I need to 'flange up'  I am hoping that whilst adding height ..I will not increase the number of joints..i.e  replace two short lengths with two longer lengths!


On Sunday, 16 September 2018, 11:31, "Edward Harland g3vpf@... [ukmicrowaves]" wrote:


 
Adrian

The length of waveguide has square flanges at each end. One is choked the other is plain. However, I do not have any sealing rings.

Ed G3VPF 


On Sat, 15 Sep 2018 at 20:22, g4uvz@... [ukmicrowaves]
wrote:
 
As part of the next phase of the GB3KBQ rebuild I am hoping to raise the antenna a couple of metres to clear local vegetation. I have a couple of old square flanges but would ideally like to use a choked flange AND sealing rings..rather than silicon sealer!
I wonder if anyone has these items which they would be prepared to donate to the project?
See attached pictures of the size of sealing rings required.
Many thanks
Adrian G4UVZ Beacon Keeper GB3KBQ




Scottish Microwave Round Table 2018 open for bookings

Brian Flynn GM8BJF
 

The 2018 Scottish Microwave Round Table will be held on the 3rd of November and is now open for registrations at:
As in past years it is being held in the Museum of Comminication in Burntisland in Fife. During the day there will be a series of talks/lectures with plenty of time in between for ragchewing. There will be the usual bring and buy stalls, measurement facilities and a dinner will be held in the evening at the nearby Kingswood Hotel.
More detailed information is available at the website at:
Any offers of talks or presentations will be well received!

73s
Brian Flynn GM8BJF




Re: WG16 Square Flange

Adrian whatmore <g4uvz@...>
 

Many Thanks Mike
Your donation would be much appreciated !

I will email you my details

Adrian


On Sunday, 16 September 2018, 9:49, "'Michael Scott' g3lyp@... [ukmicrowaves]"


 
Hi Adrian
 
I have a couple of unused square choked flanges as well as some plain ones. I also have a few of the rubber ‘O’ rings. I also have a few round choked and plain ones as well!
 
I would be happy to donate them to your beacon. Let me know the mailing address and I will send them to you.
 
73, Mike, G3LYP.
 

Sent: Saturday, September 15, 2018 3:14 PM
Subject: [ukmicrowaves] WG16 Square Flange
 
 
As part of the next phase of the GB3KBQ rebuild I am hoping to raise the antenna a couple of metres to clear local vegetation. I have a couple of old square flanges but would ideally like to use a choked flange AND sealing rings..rather than silicon sealer!
I wonder if anyone has these items which they would be prepared to donate to the project?
See attached pictures of the size of sealing rings required.
Many thanks
Adrian G4UVZ Beacon Keeper GB3KBQ




Re: WG16 Square Flange

Michael Scott
 

Hi Adrian
 
I have a couple of unused square choked flanges as well as some plain ones. I also have a few of the rubber ‘O’ rings. I also have a few round choked and plain ones as well!
 
I would be happy to donate them to your beacon. Let me know the mailing address and I will send them to you.
 
73, Mike, G3LYP.
 

From: g4uvz@... [ukmicrowaves]
Sent: Saturday, September 15, 2018 3:14 PM
To: ukmicrowaves@...
Subject: [ukmicrowaves] WG16 Square Flange
 
 

As part of the next phase of the GB3KBQ rebuild I am hoping to raise the antenna a couple of metres to clear local vegetation. I have a couple of old square flanges but would ideally like to use a choked flange AND sealing rings..rather than silicon sealer!

I wonder if anyone has these items which they would be prepared to donate to the project?

See attached pictures of the size of sealing rings required.

Many thanks

Adrian G4UVZ Beacon Keeper GB3KBQ