Date   
Re: beaconspot

Dave - G4RQI
 

Hello Ralph,

I was using the https://www.beaconspot.uk/beaconsp.php website to spot the beacons.

73 David


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Wednesday, June 12, 2019 11:00 pm
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot
 

Good evening David,

 

It could be the access you are using I.e. the way they have set up the routing for various beacons causing a double entries- it happens a lot with me when I spot 2.3GHz beacons

At my age, I have forgotten the correct term used for these points of access. !

Their routing sometimes is not correct.  Try changing the access to the DX Cluster

Should help, I hope hi

 

 

 

Quel age !!

 

73

Ralph

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 12 June 2019 20:15
To: ukmicrowaves@groups.io
Subject: [UKMicrowaves] beaconspot

 

Hello...

 

I’m sorry if this has been answered before... I have posted a couple of 3cm beacon spots this evening usinghttps://www.beaconspot.uk/beaconsp.php but when I do the spot appears twice on the DxCluster. The frequency is correct for one of the spots but 5Khz is added to the 2nd spot. Does anyone know why?

 

73 David

Sent from Mail for Windows 10

 

 


Virus-free. www.avg.com

Re: beaconspot

Ralph
 

Good morning David,

 

I am more awake this morning so will try to be clearer.

 

The DX clusters are :- GB7DJK,ON4KST-2, 5SOCLX. (There used to be more)

The way these clusters are maintained (with the latest beacon info) the

Better they perform.

You could try changing these by the command : /setclx then space GB7DJK,

For example. See if that improves the situation.

Hope this may solve your problem.  Or alternatively use the Beaconspot UK

Site and spot the beacons there .

 

73

Ralph G4ALY

 

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 13 June 2019 07:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hello Ralph,

 

I was using the https://www.beaconspot.uk/beaconsp.php website to spot the beacons.

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Wednesday, June 12, 2019 11:00 pm
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good evening David,

 

It could be the access you are using I.e. the way they have set up the routing for various beacons causing a double entries- it happens a lot with me when I spot 2.3GHz beacons

At my age, I have forgotten the correct term used for these points of access. !

Their routing sometimes is not correct.  Try changing the access to the DX Cluster

Should help, I hope hi

 

 

 

Quel age !!

 

73

Ralph

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 12 June 2019 20:15
To: ukmicrowaves@groups.io
Subject: [UKMicrowaves] beaconspot

 

Hello...

 

I’m sorry if this has been answered before... I have posted a couple of 3cm beacon spots this evening usinghttps://www.beaconspot.uk/beaconsp.php but when I do the spot appears twice on the DxCluster. The frequency is correct for one of the spots but 5Khz is added to the 2nd spot. Does anyone know why?

 

73 David

Sent from Mail for Windows 10

 

 

 

Virus-free. www.avg.com

 

Re: beaconspot

G4LDR
 

This issue has been present for a number of years. I agree with Ralph, it does (sometimes) appear to be related to which access point you are using and in which country that access point is (i.e. dependent on your settings in KST).

73 Neil G4LDR

Re: beaconspot

Ralph
 

I forgot to mention that fact Neil, hi

73

Ralph

 

Sent from Mail for Windows 10

 

From: G4LDR via Groups.Io
Sent: 13 June 2019 11:56
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

This issue has been present for a number of years. I agree with Ralph, it does (sometimes) appear to be related to which access point you are using and in which country that access point is (i.e. dependent on your settings in KST).

73 Neil G4LDR

 


Virus-free. www.avg.com

Re: beaconspot

Dave - G4RQI
 

Hello Ralph,

I was using beacon spot to spot the beacon !

73 David


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Thursday, June 13, 2019 11:42 am
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot
 

Good morning David,

 

I am more awake this morning so will try to be clearer.

 

The DX clusters are :- GB7DJK,ON4KST-2, 5SOCLX. (There used to be more)

The way these clusters are maintained (with the latest beacon info) the

Better they perform.

You could try changing these by the command : /setclx then space GB7DJK,

For example. See if that improves the situation.

Hope this may solve your problem.  Or alternatively use the Beaconspot UK

Site and spot the beacons there .

 

73

Ralph G4ALY

 

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 13 June 2019 07:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hello Ralph,

 

I was using the https://www.beaconspot.uk/beaconsp.php website to spot the beacons.

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Wednesday, June 12, 2019 11:00 pm
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good evening David,

 

It could be the access you are using I.e. the way they have set up the routing for various beacons causing a double entries- it happens a lot with me when I spot 2.3GHz beacons

At my age, I have forgotten the correct term used for these points of access. !

Their routing sometimes is not correct.  Try changing the access to the DX Cluster

Should help, I hope hi

 

 

 

Quel age !!

 

73

Ralph

 

Sent fromMail for Windows 10

 

From:Dave - G4RQI
Sent: 12 June 2019 20:15
To: ukmicrowaves@groups.io
Subject: [UKMicrowaves] beaconspot

 

Hello...

 

I’m sorry if this has been answered before... I have posted a couple of 3cm beacon spots this evening usinghttps://www.beaconspot.uk/beaconsp.php but when I do the spot appears twice on the DxCluster. The frequency is correct for one of the spots but 5Khz is added to the 2nd spot. Does anyone know why?

 

73 David

Sent fromMail for Windows 10

 

 

 

Virus-free.www.avg.com

 

Re: beaconspot

DF6NA Rainer
 

Hi,

the problem is not where you enter your spot or what beacon (or station) you spot.
The problem is when such a spot passes a faulty cluster. There the frequency will
be changed and the "false" spot is send out. All the other cluster stations will accept
that spot as a new one because the frequency is different.

Here is what I just captured from F5LEN:

G4RQI     10368760.0 GB3CAM/B       IO92WI(RS)IO93IR 51             1855z  2019-Jun-12 D I Q G M
G4RQI     10368755.0 GB3CAM/B       IO92WI(RS)IO93IR 51             1855z  2019-Jun-12 D I Q G M
OK1TEH    10368930.0 SR3XHY/B       59S qtf 48 scp jo70             1849z  2019-Jun-12 D I Q G M
OK1TEH    10368932.0 SR3XHY/B       59S qtf 48 scp jo70             1849z  2019-Jun-12 D I Q G M
9A2SB     10368860.0 OE8XGQ/B       jn66wq 57s scp jn76mp           1846z  2019-Jun-12 D I Q G M
DL6NCI    10368980.0 HG1BSB/B       jn87fi:rs:jo50vi 52s v jo70gc   1759z  2019-Jun-12 D I Q G M
DL6NCI    10368975.5 HG1BSB/B       jn87fi:rs:jo50vi 52s v jo70gc   1759z  2019-Jun-12 D I Q G M
DL6NCI    10368900.0 SR6XHC/B       jo80jg:rs:jo50vi 57s v jo70gc   1758z  2019-Jun-12 D I Q G M
DL6NCI    10368904.0 SR6XHC/B       jo80jg:rs:jo50vi 57s v jo70gc   1758z  2019-Jun-12 D I Q G M
DL6NCI    10368880.0 OE1XGA/B       jn88eg:rs:jo50vi 55s v jo70gc   1756z  2019-Jun-12 D I Q G M
DL6NCI    10368881.0 OE1XGA/B       jn88eg:rs:jo50vi 55s v jo70gc   1756z  2019-Jun-12 D I Q G M
DL6NCI    10368870.0 OK0EK/B        jn89vj:rs:jo50vi 52s v jo70gc   1751z  2019-Jun-12 D I Q G M
DL6NCI    10368930.0 SR3XHY/B       jo82lj:rs:jo50vi 55s v jo71be   1716z  2019-Jun-12 D I Q G M
DL6NCI    10368934.0 SR3XHY/B       jo82lj:rs:jo50vi 55s v jo71be   1716z  2019-Jun-12 D I Q G M
IK2OFO    10368100.0 IZ2DJP         JN45PB:TR:JN55FO                1650z  2019-Jun-12 D I Q G M
IK2OFO    24048100.0 IZ2DJP         JN45PB:TR:JN55FO                1642z  2019-Jun-12 D I Q G M

This problem exists for years and the is no solution until today.

vy 73, Rainer

Am 13.06.2019 um 13:10 schrieb Dave - G4RQI:

Hello Ralph,

I was using beacon spot to spot the beacon !

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Thursday, June 13, 2019 11:42 am
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot
 

Good morning David,

 

I am more awake this morning so will try to be clearer.

 

The DX clusters are :- GB7DJK,ON4KST-2, 5SOCLX. (There used to be more)

The way these clusters are maintained (with the latest beacon info) the

Better they perform.

You could try changing these by the command : /setclx then space GB7DJK,

For example. See if that improves the situation.

Hope this may solve your problem.  Or alternatively use the Beaconspot UK

Site and spot the beacons there .

 

73

Ralph G4ALY

 

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 13 June 2019 07:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hello Ralph,

 

I was using the https://www.beaconspot.uk/beaconsp.php website to spot the beacons.

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Wednesday, June 12, 2019 11:00 pm
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good evening David,

 

It could be the access you are using I.e. the way they have set up the routing for various beacons causing a double entries- it happens a lot with me when I spot 2.3GHz beacons

At my age, I have forgotten the correct term used for these points of access. !

Their routing sometimes is not correct.  Try changing the access to the DX Cluster

Should help, I hope hi

 

 

 

Quel age !!

 

73

Ralph

 

Sent fromMail for Windows 10

 

From:Dave - G4RQI
Sent: 12 June 2019 20:15
To: ukmicrowaves@groups.io
Subject: [UKMicrowaves] beaconspot

 

Hello...

 

I’m sorry if this has been answered before... I have posted a couple of 3cm beacon spots this evening usinghttps://www.beaconspot.uk/beaconsp.php but when I do the spot appears twice on the DxCluster. The frequency is correct for one of the spots but 5Khz is added to the 2nd spot. Does anyone know why?

 

73 David

Sent fromMail for Windows 10

 

 


Re: beaconspot

Ralph
 

Then, and I did’nt read the orginal message fully. There is maybe a couple of mismatches on the Dx Cluster somewhere.

Where the frequency may differ from the one you entered, so it puts yours and its own frequency information on as well.

Beaconspot is usually right, though if you enter a frequency different to the allocated bkn freq then somewhere along

The chain there is a difference in what is acceptable so puts both on . I cannot think of any other reason, sorry.

 

73

Ralph

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 13 June 2019 12:13
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hello Ralph,

 

I was using beacon spot to spot the beacon !

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Thursday, June 13, 2019 11:42 am
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good morning David,

 

I am more awake this morning so will try to be clearer.

 

The DX clusters are :- GB7DJK,ON4KST-2, 5SOCLX. (There used to be more)

The way these clusters are maintained (with the latest beacon info) the

Better they perform.

You could try changing these by the command : /setclx then space GB7DJK,

For example. See if that improves the situation.

Hope this may solve your problem.  Or alternatively use the Beaconspot UK

Site and spot the beacons there .

 

73

Ralph G4ALY

 

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 13 June 2019 07:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hello Ralph,

 

I was using the https://www.beaconspot.uk/beaconsp.php website to spot the beacons.

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Wednesday, June 12, 2019 11:00 pm
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good evening David,

 

It could be the access you are using I.e. the way they have set up the routing for various beacons causing a double entries- it happens a lot with me when I spot 2.3GHz beacons

At my age, I have forgotten the correct term used for these points of access. !

Their routing sometimes is not correct.  Try changing the access to the DX Cluster

Should help, I hope hi

 

 

 

Quel age !!

 

73

Ralph

 

Sent fromMail for Windows 10

 

From:Dave - G4RQI
Sent: 12 June 2019 20:15
To: ukmicrowaves@groups.io
Subject: [UKMicrowaves] beaconspot

 

Hello...

 

I’m sorry if this has been answered before... I have posted a couple of 3cm beacon spots this evening usinghttps://www.beaconspot.uk/beaconsp.php but when I do the spot appears twice on the DxCluster. The frequency is correct for one of the spots but 5Khz is added to the 2nd spot. Does anyone know why?

 

73 David

Sent fromMail for Windows 10

 

 

 

Virus-free.www.avg.com

 

 

Re: beaconspot

Ralph
 

Hi Rainer,

You have put into words what I was trying to convey hi , thanks

 

73

Ralph

 

Sent from Mail for Windows 10

 

From: DF6NA Rainer
Sent: 13 June 2019 13:47
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hi,

the problem is not where you enter your spot or what beacon (or station) you spot.
The problem is when such a spot passes a faulty cluster. There the frequency will
be changed and the "false" spot is send out. All the other cluster stations will accept
that spot as a new one because the frequency is different.

Here is what I just captured from F5LEN:

G4RQI     103687
60.0 GB3CAM/B       IO92WI(RS)IO93IR 51             1855z  2019-Jun-12 D I Q G M
G4RQI     103687
55.0 GB3CAM/B       IO92WI(RS)IO93IR 51             1855z  2019-Jun-12 D I Q G M
OK1TEH    103689
30.0 SR3XHY/B       59S qtf 48 scp jo70             1849z  2019-Jun-12 D I Q G M
OK1TEH    103689
32.0 SR3XHY/B       59S qtf 48 scp jo70             1849z  2019-Jun-12 D I Q G M
9A2SB     10368860.0 OE8XGQ/B       jn66wq 57s scp jn76mp           1846z  2019-Jun-12 D I Q G M
DL6NCI    103689
80.0 HG1BSB/B       jn87fi:rs:jo50vi 52s v jo70gc   1759z  2019-Jun-12 D I Q G M
DL6NCI    103689
75.5 HG1BSB/B       jn87fi:rs:jo50vi 52s v jo70gc   1759z  2019-Jun-12 D I Q G M
DL6NCI    103689
00.0 SR6XHC/B       jo80jg:rs:jo50vi 57s v jo70gc   1758z  2019-Jun-12 D I Q G M
DL6NCI    103689
04.0 SR6XHC/B       jo80jg:rs:jo50vi 57s v jo70gc   1758z  2019-Jun-12 D I Q G M
DL6NCI    103688
80.0 OE1XGA/B       jn88eg:rs:jo50vi 55s v jo70gc   1756z  2019-Jun-12 D I Q G M
DL6NCI    103688
81.0 OE1XGA/B       jn88eg:rs:jo50vi 55s v jo70gc   1756z  2019-Jun-12 D I Q G M
DL6NCI    10368870.0 OK0EK/B        jn89vj:rs:jo50vi 52s v jo70gc   1751z  2019-Jun-12 D I Q G M
DL6NCI    103689
30.0 SR3XHY/B       jo82lj:rs:jo50vi 55s v jo71be   1716z  2019-Jun-12 D I Q G M
DL6NCI    103689
34.0 SR3XHY/B       jo82lj:rs:jo50vi 55s v jo71be   1716z  2019-Jun-12 D I Q G M
IK2OFO    10368100.0 IZ2DJP         JN45PB:TR:JN55FO                1650z  2019-Jun-12 D I Q G M
IK2OFO    24048100.0 IZ2DJP         JN45PB:TR:JN55FO                1642z  2019-Jun-12 D I Q G M

This problem exists for years and the is no solution until today.

vy 73, Rainer

Am 13.06.2019 um 13:10 schrieb Dave - G4RQI:

Hello Ralph,

 

I was using beacon spot to spot the beacon !

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Thursday, June 13, 2019 11:42 am
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good morning David,

 

I am more awake this morning so will try to be clearer.

 

The DX clusters are :- GB7DJK,ON4KST-2, 5SOCLX. (There used to be more)

The way these clusters are maintained (with the latest beacon info) the

Better they perform.

You could try changing these by the command : /setclx then space GB7DJK,

For example. See if that improves the situation.

Hope this may solve your problem.  Or alternatively use the Beaconspot UK

Site and spot the beacons there .

 

73

Ralph G4ALY

 

 

Sent from Mail for Windows 10

 

From: Dave - G4RQI
Sent: 13 June 2019 07:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Hello Ralph,

 

I was using the https://www.beaconspot.uk/beaconsp.php website to spot the beacons.

 

73 David

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Ralph via Groups.Io <Ralph.Bird@...>
Sent: Wednesday, June 12, 2019 11:00 pm
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] beaconspot

 

Good evening David,

 

It could be the access you are using I.e. the way they have set up the routing for various beacons causing a double entries- it happens a lot with me when I spot 2.3GHz beacons

At my age, I have forgotten the correct term used for these points of access. !

Their routing sometimes is not correct.  Try changing the access to the DX Cluster

Should help, I hope hi

 

 

 

Quel age !!

 

73

Ralph

 

Sent fromMail for Windows 10

 

From:Dave - G4RQI
Sent: 12 June 2019 20:15
To: ukmicrowaves@groups.io
Subject: [UKMicrowaves] beaconspot

 

Hello...

 

I’m sorry if this has been answered before... I have posted a couple of 3cm beacon spots this evening usinghttps://www.beaconspot.uk/beaconsp.php but when I do the spot appears twice on the DxCluster. The frequency is correct for one of the spots but 5Khz is added to the 2nd spot. Does anyone know why?

 

73 David

Sent fromMail for Windows 10

 

 

 

 


Virus-free. www.avg.com

Re: G0MRF downconverter

militaryoperator
 

G0MRF downconverter

needs:  D2 HSMP-3882-TR1G Pin Diode

This seems hard to find. Is it really needed, seems to be across the o/p of converter so what's its role? limiter ?

Could two other diodes back to back suit ?

Ben.

Re: G0MRF downconverter

Michael Scott
 

Hi Ben
 
The chipbank has a number of HSMP PIN diodes single and double, I will have a look to see if we have any tri. I am in the process of packing it up for RAL!
 
73, Mike
 

From: militaryoperator via Groups.Io
Sent: Thursday, June 13, 2019 7:07 PM
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] G0MRF downconverter
 
G0MRF downconverter

needs:  D2 HSMP-3882-TR1G Pin Diode

This seems hard to find. Is it really needed, seems to be across the o/p of converter so what's its role? limiter ?

Could two other diodes back to back suit ?

Ben.
 

ADF5355 sketch in latest Scatterpoint

Barry Chambers
 

There appears to be an error in the sketch for the ADF5355 board reported in the latest  Scatterpoint.

Line 16 should read

#include <Rotary.h>

Also ensure that you have the latest version of the Adafruit SSD1306 library - my earlier one gave a compilation error.
-- 

73

Barry, G8AGN

Maximum Power using FR4 board ?

simonchettle
 

This is  a simple question what is the maximum power anyone would risk using a 1/4 length strip line on FR4 on 23cms ? 
 
Why because my metal working tools and skills are close zero and I am thinking of building a Wilkinson divider. 
 
I am thinking of combining two power amplifiers each of circa 100 W  O/P. 
 
 
Cheers
 
 
Simon
 
G8ATB
 

Re: Maximum Power using FR4 board ?

Murray Niman
 

Lots more if you happen to use 1oz copper clad, rather than the more usual 0.5 or 0.25oz

73

  Murray

Re: Maximum Power using FR4 board ?

Gordon REASON
 

If .............. you have a good load , 100 W should be ok .............

Some years back I made and  testee , low power , a 2,7 Ghz coupler .

The customer put 400 watts through it , and it melted ...............!

On 14 June 2019 at 17:56 simonchettle <simon@...> wrote:

This is  a simple question what is the maximum power anyone would risk using a 1/4 length strip line on FR4 on 23cms ? 
 
Why because my metal working tools and skills are close zero and I am thinking of building a Wilkinson divider. 
 
I am thinking of combining two power amplifiers each of circa 100 W  O/P. 
 
 
Cheers
 
 
Simon
 
G8ATB
 


 


 

Re: Maximum Power using FR4 board ?

John Worsnop
 

So much depends on where the line is in the circuit, the dielectric thickness and the type of FR4. At RF, not all FR4 is the same! The thing is the the power density in the dielectric. The reason I used low loss RF35 in my 45W pa was the original FR4 version cooked the output line. In contrast, designs by  Goran AD6IW I've seen work perfectly well at similar powers. That may of course just be a reflection on Goran's design skills compared to mine!

Stick to proper microwave materials for power if you can.

73 John

On Sat, 15 Jun 2019, 01:01 Gordon REASON via Groups.Io, <gordonj.reason=virgin.net@groups.io> wrote:

If .............. you have a good load , 100 W should be ok .............

Some years back I made and  testee , low power , a 2,7 Ghz coupler .

The customer put 400 watts through it , and it melted ...............!

On 14 June 2019 at 17:56 simonchettle <simon@...> wrote:

This is  a simple question what is the maximum power anyone would risk using a 1/4 length strip line on FR4 on 23cms ? 
 
Why because my metal working tools and skills are close zero and I am thinking of building a Wilkinson divider. 
 
I am thinking of combining two power amplifiers each of circa 100 W  O/P. 
 
 
Cheers
 
 
Simon
 
G8ATB
 


 


 

RAL

SAM JEWELL
 

Folks,
I have a number of 24GHz equipment items that I wish to dispose of at RAL.
Amongst these I have an unused Millitech 2  - 2.5W PA, 48cm Procom dish with Procom 24GHz feed fitted, 26.5GHz APC3.5 (SMA like) relays, one of those nice ZL sourced waveguide switches, several other waveguide items. In addition, I have decided I won’t be getting going on 47GHz again any time soon, so I have a number of 47GHz items available, including a number of Kuhne commercial items.
I’ll bring these items tomorrow, together with the WA5VJB PCB antennas. I don’t plan to bring any kits, but if anyone wants to reserve anything in particular, I will endeavour to bring it along.

73 de Sam, G4DDK

Re: Maximum Power using FR4 board ?

John Quarmby
 

I found 50W of 1296MHz through a 50 ohm stripline on FR4 cooked the board and discoloured it over time. Why not use suspended microstrip with air dielectric, that would avoid the problem entirely at any reasonable power level.

73

John G3XDY 



Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: John Worsnop <johnworsnop@...>
Date: 15/06/2019 08:28 (GMT+00:00)
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Maximum Power using FR4 board ?

So much depends on where the line is in the circuit, the dielectric thickness and the type of FR4. At RF, not all FR4 is the same! The thing is the the power density in the dielectric. The reason I used low loss RF35 in my 45W pa was the original FR4 version cooked the output line. In contrast, designs by  Goran AD6IW I've seen work perfectly well at similar powers. That may of course just be a reflection on Goran's design skills compared to mine!

Stick to proper microwave materials for power if you can.

73 John

On Sat, 15 Jun 2019, 01:01 Gordon REASON via Groups.Io, <gordonj.reason=virgin.net@groups.io> wrote:

If .............. you have a good load , 100 W should be ok .............

Some years back I made and  testee , low power , a 2,7 Ghz coupler .

The customer put 400 watts through it , and it melted ...............!

On 14 June 2019 at 17:56 simonchettle <simon@...> wrote:

This is  a simple question what is the maximum power anyone would risk using a 1/4 length strip line on FR4 on 23cms ? 
 
Why because my metal working tools and skills are close zero and I am thinking of building a Wilkinson divider. 
 
I am thinking of combining two power amplifiers each of circa 100 W  O/P. 
 
 
Cheers
 
 
Simon
 
G8ATB
 


 


 

Re: ADF5355 sketch in latest Scatterpoint

brian.flynn
 

Hi Barry,

I just double checked out both the Rotary.h library and RotaryEncoder.h library.  Both compile  and work OK on my setup at least.  I confusingly left the reference to the Encoder.h libray on the  line. I have now removed it.

73s
Brian GM8BJF

RAL parts

SAM JEWELL
 

Folks,
Well, that generated some interest!
I really want to offer these items at RAL. It saves packaging stuff to post (certainly not the 48cm dish and feed!).
What is left over at the end of the day I will be willing to ship (except that dish).
Please, cash only at RAL.  These are my own items and not part of my normal DDKit hobby business. Just having another shack/garage clear out. All items have not been used for the usual 2-5 yearzzzzzz.

I do have a couple of the WA5VJB 2.4GHz circular patch feeds left for sale. I hope to get more from Kent in the next few weeks. I’ll bring these few to RAL. Why go serial when you can go parallel!

73 de Sam

Re: RAL parts

Andy G4JNT
 

I may be interested Sam.



Virus-free. www.avg.com


On Sat, 15 Jun 2019 at 11:34, SAM JEWELL via Groups.Io <jewell=btinternet.com@groups.io> wrote:
Folks,
Well, that generated some interest!
I really want to offer these items at RAL. It saves packaging stuff to post (certainly not the 48cm dish and feed!).
What is left over at the end of the day I will be willing to ship (except that dish).
Please, cash only at RAL.  These are my own items and not part of my normal DDKit hobby business. Just having another shack/garage clear out. All items have not been used for the usual 2-5 yearzzzzzz.

I do have a couple of the WA5VJB 2.4GHz circular patch feeds left for sale. I hope to get more from Kent in the next few weeks. I’ll bring these few to RAL. Why go serial when you can go parallel!

73 de Sam