Date   

wanted dish feeds for the Es hail 2 satellite

Paul G8KFW
 

Hi all

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

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

Regards Paul



--
Paul Bicknell G8KFW   South Coast UK


Re: Radar Interference on 23cm

mike G6TRM
 

Hi Richard, I guess what you say is possible.....In a moment of idle thought, I did wonder if had anything to do with a certain American coming to the UK....but back to reality.....I think Sams suggestion might hold more water!!!

Mike G6TRM

----- Original Message -----
From: "Richard" <richard@g8jvm.com>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 6:51 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Freq hopping radar, highly probable with use by certain gov depts.
It would have the advantage of difficulty finding the source, there are
plenty of transmissions that no information is available on, well not
to us anyway.
Richard

On Thu, 2019-06-06 at 18:39 +0100, mike G6TRM via Groups.Io wrote:
Hi all,
Sam, If you get chance, could you record it for me, to compare?
Richard,
Because of the lack of any regular pulse repetition, I have
wondered....
frequency hopping radar..Is there such a thing?

Ian, Not sure it's from Hougham mast..It definitely sounds like
Radar...

My apologies for not thanking Murray earlier, for finding the L band
radar
map I thought was gone!!

Mike G6TRM

----- Original Message -----
From: "Richard" <richard@g8jvm.com>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 6:18 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Could be frequency hopping Mike ?

On Thu, 2019-06-06 at 17:51 +0100, mike G6TRM via Groups.Io wrote:
Hi Phil,
I have the same filter in front of my preamp, mine is definitely
a
"burrumph" like radar...preamp on/off made no difference...I used
to
get it
occasionally, with no regular repeatability..sometimes there
would be
2
minutes between pulses, sometime It would be an hour or more...My
impression
was some sort of landing radar on the French coast but what sort
of
radar
would only tx once ( One radar scan ) then nothing for
ages...unless
is was
something else altogether..

Mike G6TRM


----- Original Message -----
From: "Phil Guttridge G3TCU" <p.guttridge@ucl.ac.uk>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 5:35 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Hi Mike,

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

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

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

73, Phil G3TCU



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

Regards

Mike G6TRM




---
This email has been checked for viruses by AVG.
https://www.avg.com





--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

###################################################################
###

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
###################################################################
###






--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################




Re: Radar Interference on 23cm

Richard <richard@...>
 

Freq hopping radar, highly probable with use by certain gov depts.
It would have the advantage of difficulty finding the source, there are
plenty of transmissions that no information is available on, well not
to us anyway.
Richard

On Thu, 2019-06-06 at 18:39 +0100, mike G6TRM via Groups.Io wrote:
Hi all,
Sam, If you get chance, could you record it for me, to compare?
Richard,
Because of the lack of any regular pulse repetition, I have
wondered....
frequency hopping radar..Is there such a thing?

Ian, Not sure it's from Hougham mast..It definitely sounds like
Radar...

My apologies for not thanking Murray earlier, for finding the L band
radar
map I thought was gone!!

Mike G6TRM

----- Original Message -----
From: "Richard" <richard@g8jvm.com>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 6:18 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Could be frequency hopping Mike ?

On Thu, 2019-06-06 at 17:51 +0100, mike G6TRM via Groups.Io wrote:
Hi Phil,
I have the same filter in front of my preamp, mine is definitely
a
"burrumph" like radar...preamp on/off made no difference...I used
to
get it
occasionally, with no regular repeatability..sometimes there
would be
2
minutes between pulses, sometime It would be an hour or more...My
impression
was some sort of landing radar on the French coast but what sort
of
radar
would only tx once ( One radar scan ) then nothing for
ages...unless
is was
something else altogether..

Mike G6TRM


----- Original Message -----
From: "Phil Guttridge G3TCU" <p.guttridge@ucl.ac.uk>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 5:35 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Hi Mike,

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

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

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

73, Phil G3TCU



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

Regards

Mike G6TRM




---
This email has been checked for viruses by AVG.
https://www.avg.com





--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

###################################################################
###

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
###################################################################
###






--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################


Re: Radar Interference on 23cm

mike G6TRM
 

Hi all,
Sam, If you get chance, could you record it for me, to compare?
Richard,
Because of the lack of any regular pulse repetition, I have wondered.... frequency hopping radar..Is there such a thing?

Ian, Not sure it's from Hougham mast..It definitely sounds like Radar...

My apologies for not thanking Murray earlier, for finding the L band radar map I thought was gone!!

Mike G6TRM

----- Original Message -----
From: "Richard" <richard@g8jvm.com>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 6:18 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Could be frequency hopping Mike ?

On Thu, 2019-06-06 at 17:51 +0100, mike G6TRM via Groups.Io wrote:
Hi Phil,
I have the same filter in front of my preamp, mine is definitely a
"burrumph" like radar...preamp on/off made no difference...I used to
get it
occasionally, with no regular repeatability..sometimes there would be
2
minutes between pulses, sometime It would be an hour or more...My
impression
was some sort of landing radar on the French coast but what sort of
radar
would only tx once ( One radar scan ) then nothing for ages...unless
is was
something else altogether..

Mike G6TRM


----- Original Message -----
From: "Phil Guttridge G3TCU" <p.guttridge@ucl.ac.uk>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 5:35 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Hi Mike,

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

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

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

73, Phil G3TCU



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

Regards

Mike G6TRM




---
This email has been checked for viruses by AVG.
https://www.avg.com





--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################




Re: Radar Interference on 23cm

Richard <richard@...>
 

Could be frequency hopping Mike ?

On Thu, 2019-06-06 at 17:51 +0100, mike G6TRM via Groups.Io wrote:
Hi Phil,
I have the same filter in front of my preamp, mine is definitely a
"burrumph" like radar...preamp on/off made no difference...I used to
get it
occasionally, with no regular repeatability..sometimes there would be
2
minutes between pulses, sometime It would be an hour or more...My
impression
was some sort of landing radar on the French coast but what sort of
radar
would only tx once ( One radar scan ) then nothing for ages...unless
is was
something else altogether..

Mike G6TRM


----- Original Message -----
From: "Phil Guttridge G3TCU" <p.guttridge@ucl.ac.uk>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 5:35 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Hi Mike,

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

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

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

73, Phil G3TCU



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

Regards

Mike G6TRM




---
This email has been checked for viruses by AVG.
https://www.avg.com





--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################


Re: Radar Interference on 23cm

SAM JEWELL
 

Not much more, Mike. I know it is detectable here all the time and gets much worse when the weather is calm (probably seeing ducting). It peaks 123 degrees from here. The TS2000X NB was more effective than the K3 NB, at removing it. I did try lots of different settings, but no significant improvement .
I’m not sure I’ve tried the IC9700 on it, yet. If condx up this evening, I’ll try it.
One of our ON friends can probably tell us a bit more about it.

Sam, G4DDK

On Thursday, June 6, 2019, 5:58 pm, mike G6TRM via Groups.Io <mike.bryant@...> wrote:

Hi Sam,
You might be on to something there....there was a definite enhancement that way on Sunday and it was the worst It has ever been for me.
never thought of using a NB just tried to work through it.will try it in the future...
Do you know any more about it?
 
Mike G6TRM
----- Original Message -----
Sent: Thursday, June 06, 2019 5:44 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm

Is it the Belgian one? Really bad here at times. Any North Sea ducting and it can be really, really, bad. The NB helps but doesn’t eliminate it.

Sam, G4DDK


Sent from Yahoo Mail for iPad

On Thursday, June 6, 2019, 5:12 pm, mike G6TRM via Groups.Io <mike.bryant@...> wrote:

Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near  to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
It has got much worse recently, make the band unusable at times.

Regards

Mike G6TRM



Re: Radar Interference on 23cm

mike G6TRM
 


Hi Sam,
You might be on to something there....there was a definite enhancement that way on Sunday and it was the worst It has ever been for me.
never thought of using a NB just tried to work through it.will try it in the future...
Do you know any more about it?
 
Mike G6TRM

----- Original Message -----
Sent: Thursday, June 06, 2019 5:44 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm

Is it the Belgian one? Really bad here at times. Any North Sea ducting and it can be really, really, bad. The NB helps but doesn’t eliminate it.

Sam, G4DDK


Sent from Yahoo Mail for iPad

On Thursday, June 6, 2019, 5:12 pm, mike G6TRM via Groups.Io <mike.bryant@...> wrote:

Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near  to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
It has got much worse recently, make the band unusable at times.

Regards

Mike G6TRM



Re: Radar Interference on 23cm

mike G6TRM
 

Hi Phil,
I have the same filter in front of my preamp, mine is definitely a "burrumph" like radar...preamp on/off made no difference...I used to get it occasionally, with no regular repeatability..sometimes there would be 2 minutes between pulses, sometime It would be an hour or more...My impression was some sort of landing radar on the French coast but what sort of radar would only tx once ( One radar scan ) then nothing for ages...unless is was something else altogether..

Mike G6TRM

----- Original Message -----
From: "Phil Guttridge G3TCU" <p.guttridge@ucl.ac.uk>
To: <UKMicrowaves@groups.io>
Sent: Thursday, June 06, 2019 5:35 PM
Subject: Re: [UKMicrowaves] Radar Interference on 23cm


Hi Mike,

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

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

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

73, Phil G3TCU



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

Regards

Mike G6TRM




---
This email has been checked for viruses by AVG.
https://www.avg.com



Re: Radar Interference on 23cm

SAM JEWELL
 

Is it the Belgian one? Really bad here at times. Any North Sea ducting and it can be really, really, bad. The NB helps but doesn’t eliminate it.

On Thursday, June 6, 2019, 5:12 pm, mike G6TRM via Groups.Io <mike.bryant@...> wrote:

Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near  to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
It has got much worse recently, make the band unusable at times.

Regards

Mike G6TRM



Re: Radar Interference on 23cm

ian hope (2E0IJH)
 

Intermod from Hougham TV transmiter?, Did have issues with that when tried 23cm at Capel.
 
Ian
2E0IJH

 
Sent: Thursday, June 06, 2019 at 5:09 PM
From: "mike G6TRM via Groups.Io" <mike.bryant@...>
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Radar Interference on 23cm
Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
It has got much worse recently, make the band unusable at times.

Regards

Mike G6TRM


 


Re: Radar Interference on 23cm

Richard <richard@...>
 

It was on the main website Mike
but it appears to have been removed
https://www.microwavers.org/maps/radars.html
May be the webmaster may explain why it was removed ?

Richard

On Thu, 2019-06-06 at 09:09 -0700, mike G6TRM via Groups.Io wrote:
Following massive interference on 23cm during the 4th low band
contest on 2nd June, I have tried to find any information regarding
Radar sites near to Dover. There used to be a listing on the UKuG
website but I can't find it any more. Can anyone offer up any
assistance? Freq?? Location??
It has got much worse recently, make the band unusable at times.

Regards

Mike G6TRM


--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################


Re: Radar Interference on 23cm

Phil Guttridge G3TCU
 

Hi Mike,

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

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

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

73, Phil G3TCU

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

Regards

Mike G6TRM




---
This email has been checked for viruses by AVG.
https://www.avg.com


Re: Radar Interference on 23cm

Murray Niman
 


The location maps are still there....

https://www.microwavers.org/?maps/radars3.htm 
(linked from the beacons page along with other maps)

There is nothing on land near Dover
 - and not much on mainland Europe near it either
 - https://en.wikipedia.org/wiki/NATO_Integrated_Air_Defense_System#France 

Of course that wont acccount for naval shipping passing by, (assuming it really was a radar)

   73

 Murray G6JYB


IARU region 1 TV contest this weekend

Noel G8GTZ
 

Just a reminder for those with TV equipment that it’s the AIRU region 1 ATV contest this weekend for all bands between 432MHz and 76GHz plus BATC are running a UK only contest for 71 and 146MHz.

 

It’s the only ATV contest of the year and last year the UK had the most entries of any country and several UK stations were band winners.  https://wiki.batc.org.uk/IARU_ATV_contest_2018_Results

 

Rules etc for this year are here https://forum.batc.org.uk/viewtopic.php?f=75&t=6119

 

If you are intending to be active please post on the BATC forum here: https://forum.batc.org.uk/viewtopic.php?f=75&t=6100

 

Talkback will be on 144.750, Zello, mobile phone and https://www.dxspot.tv/

 

Oscar100 can be used for talkback but the rules have been updated to specifically exclude the use of repeaters and transponders to make ATV contacts!

 

73

 

Noel – G8GTZ


Radar Interference on 23cm

mike G6TRM
 

Following massive interference on 23cm during the 4th low band contest on 2nd June, I have tried to find any information regarding Radar sites near to Dover. There used to be a listing on the UKuG website but I can't find it any more. Can anyone offer up any assistance? Freq?? Location??
It has got much worse recently, make the band unusable at times.

Regards

Mike G6TRM


Re: anyone recognise this

Dave Brown
 

No, sorry--- it was of UK origin, the T/R  assy was from EMI. It was old….

DaveB, ZL3FJ

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Paul Bicknell
Sent: Sunday, June 02, 2019 23:05
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] anyone recognise this

 

Hi

just for interest do you have a picture of the radar system it came out of

 

regards Paul

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Colin G4EML
Sent: 02 June 2019 09:34
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] anyone recognise this

 

I agree it is probably a noise source. When I worked for Decca Radar they made similar devices which were  noise diodes or in some systems Gunn oscillators that were used for BITE testing. I remember as an apprentice spending hours testing the Gunn oscillators in a hot/cold oven to make sure the frequency stayed within spec. 

 


On 2 Jun 2019, at 09:19, Dave G8KHU <david@...> wrote:

Possibly a noise injection source for BIT sensitivity testing, its position in the receiver chain would support that. If so I'd expect the coupled cavity section to resonate at the working frequency of the radar so as to provide noise at the wanted frequency of the radar and some degree of noise attenuation at the image frequency.

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


Re: Dummy Load

Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
 

On Wed, 5 Jun 2019 at 13:30, Paul Bicknell <paul@...> wrote:

Hi

Precision N type is good for 22 Ghz

What do you define as precision N? I am not aware of any formal definition. Maury Microwave have two types they call Maury Precision and Maury High Precision, but I don’t know of anything that’s universally accepted as being “precision N”. 

Dave

Dave. 
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
https://www.kirkbymicrowave.co.uk/
Tel 01621-680100 / +44 1621-680100


Re: Dummy Load

g4zod@btinternet.com
 

Thanks for the responses so far.
The Load has a "C" Connector with a N adapter.
I have a feeling it was used on WD equipment.
I have another one which is dead. Also would it have a Berillium substrate inside?
Many thanks.
G4ZOD

Sent from BlueMail

On 5 Jun 2019, at 13:58, "R Hopkins via Groups.Io" <btinternet.com@groups.io target=_blank>gw4nos=btinternet.com@groups.io> wrote:
There were loads of these at the rallies in the eighties. I've got two of them and they both have
"C" connectors on them. A friend who also bought one at the time 'phoned the company who are (or
were) based in Edinburgh and I think they told him 2GHz was the upper limit. I hope my I'm wrong. It
was a long time ago (35years).

Roger GW4NOS

On Tue, 4 Jun 2019 23:03:51 +0100 (BST), you wrote:



I have acquired a small dummy load. (with a donation to club funds)
It is made by M.E.S.L Type ST1592 It is rated at 10 Watts.
However it does not give a frequency range.
I have tried the W.W.W. but cannot find any reference to it.
Can anybody out there advise me of its upper and lower frequency range.
Many thanks.
G4ZOD













Re: Dummy Load

R Hopkins
 

There were loads of these at the rallies in the eighties. I've got two of them and they both have
"C" connectors on them. A friend who also bought one at the time 'phoned the company who are (or
were) based in Edinburgh and I think they told him 2GHz was the upper limit. I hope my I'm wrong. It
was a long time ago (35years).

Roger GW4NOS

On Tue, 4 Jun 2019 23:03:51 +0100 (BST), you wrote:



I have acquired a small dummy load. (with a donation to club funds)
It is made by M.E.S.L Type ST1592 It is rated at 10 Watts.
However it does not give a frequency range.
I have tried the W.W.W. but cannot find any reference to it.
Can anybody out there advise me of its upper and lower frequency range.
Many thanks.
G4ZOD







Re: Dummy Load

Paul G8KFW
 

Hi

Precision N type is good for 22 Ghz

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Robert G8RPI via Groups.Io
Sent: 05 June 2019 13:11
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Dummy Load

 

As it uses a precision N type it should be good to a few GHz at least..
Alternative part numbers for the NSN are A42975 and CC2506171-1

Robert G8RPI

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK

15461 - 15480 of 65597