Date   
Re: Chipbank 2.4GHz Murata Filters

Colin G4EML
 

Hi Andy, 

The up converter files are all in the groups.io files area. 
I did do some plots of the filters when I was designing it. I am not sure if I still have them. I will have to search my computer for them. 

Colin G4EML. 

And before anyone asks, no I don’t have any PCBs left! 



On 26 Mar 2020, at 17:19, Andy G4JNT <andy.g4jnt@...> wrote:

Has anyone made any measurements on these.   I've just realised I have a few on the shelf but don't want to go to the effort of measuring their response if it's already been done.

Alo recall someone here designing a 2.4GHz upconverter using chipbank components, but can't find a reference to it.

Chipbank 2.4GHz Murata Filters

Andy G4JNT
 

Has anyone made any measurements on these.   I've just realised I have a few on the shelf but don't want to go to the effort of measuring their response if it's already been done.

Alo recall someone here designing a 2.4GHz upconverter using chipbank components, but can't find a reference to it.

Re: GB3FNY on 3cm? ISCAT

Alan
 

Thanks Neil,   it was when it first came out to really just test it with smaller AS bursts...we usually ended up just using cw or ssb, but was certainly worth trying.

Looking forward to getting out again...The home system still not finished sadly.

73 Alan GM0USI





07785744643

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www.alandimmick.com

instagram @alandimmick

Studio 331

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G1 5QH






From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Neil Smith G4DBN <neil@...>
Sent: 26 March 2020 00:55
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] GB3FNY on 3cm? ISCAT
 

OK, I have used it on the lower bands, but there isn't a lot of advantage over CW unless the other station in not a CW op.  The JT9 fast modes with short cycle times give a much better chance of completion in a small number of reflections, but we can't use them so I guess ISCAT is the way to go.

Thanks for info Alan

Neil G4DBN


On 25/03/2020 19:27, Alan wrote:
Hi Neil,

Tony G4CBW and myself used to use ISCAT ...B on 3cm ?  I think,  on many occasions - usually worked very well for AS.

73 Alan GM0USI



07785744643

info@...

www.alandimmick.com

instagram @alandimmick

Studio 331

60-64 Osborne St

South Block

Glasgow

G1 5QH




Virus-free. www.avast.com

Re: GB3FNY on 3cm? ISCAT

John Worsnop
 


On Thu, 26 Mar 2020, 00:55 Neil Smith G4DBN, <neil@...> wrote:

OK, I have used it on the lower bands, but there isn't a lot of advantage over CW unless the other station in not a CW op.  The JT9 fast modes with short cycle times give a much better chance of completion in a small number of reflections, but we can't use them so I guess ISCAT is the way to go.

Thanks for info Alan

Neil G4DBN


On 25/03/2020 19:27, Alan wrote:
Hi Neil,

Tony G4CBW and myself used to use ISCAT ...B on 3cm ?  I think,  on many occasions - usually worked very well for AS.

73 Alan GM0USI



07785744643

info@...

www.alandimmick.com

instagram @alandimmick

Studio 331

60-64 Osborne St

South Block

Glasgow

G1 5QH



Re: Circulator information anyone ?

GM6VXB
 

Many thanks Eric.
I think it is called getting old when I cannot remember things from the 80' and 90's ( or was it the triple anurism I had).

Suspicion was correct in that the black isolator came from the old 'over the horizon' tropo scatter system I worked on
in the 80's and 90's. Systems were used for links out to oil and gas platforms in the North Sea, but were scrapped some
time around 1998/9 and superseeded by Satellite systems.
The device might be useful for a QO-100 system which I must finish building up.

The grey device then came from a junk sale and bought for £1 over on the West coast of Scotland (Crianlarich).
Still a mistry what frequency it is useful for but maybe (from size) around 1.5GHz.

Martin, GM6VXB

Re: Skew paths on 10GHz tonight

Nicholas Shaxted
 

Hi Neil,
Yes this High pressure system currently sitting over the north-east European mainland is heavily influencing matters on 3cm.
The air mass in its "nose" seems to be blocking east-west paths. PI7ALK is normally a good signal here but has been reduced to just detectable.
GB3PKT at -12dBjt and GB3MHZ at -20dBpi4 are both much stronger pointing North-East than direct showing a strong skewing.
I have not heard the normal skewed signals from GB3LEX or any of the beacons in France.

As the sun set in the evenings we have a couple of hours of PI7ALK and DB0GHZ both at s9 probably due to an evaporation duct now that the sea swell has dropped to below 1m.

The High pressure seems to be filling now so these condition decline. This morning GB3PKT is still -12dBjt with the dish pointing towards northern Netherlands so there is still a strong skew path present.
No other signals found yet this morning


Nick - g4ogi

-----Original Message-----
From: UKMicrowaves@groups.io On Behalf Of Neil Smith G4DBN via Groups.Io
Sent: Thursday, March 26, 2020 12:52 AM
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Skew paths on 10GHz tonight

Some very odd beam headings for SM/OZ sigs on 10GHz this evening

I'm hearing OZ5SHF about 15 degrees south of true, and SM6VTZ was 9 degrees south. DL0SHF about 7 degrees south.  I can't hear GB3LEX direct, but there is a strong steady signal coming from 150 degrees, at least 45 degrees of the direct path. GB3CAM is normally S1/2 but now it is so loud, I heard it as S5 off the back of my dish. Direct it is S9+, but nil from anywhere further south.

Sadly, despite Chris being a decent signal for a while, he never had a strong enough signal from me to copy anything.  Still, 936km is a decent distance when there is 400ft of limestone in the path.

The duct has left me now.

Neil G4DBN

Re: GB3FNY on 3cm? ISCAT

Neil Smith G4DBN
 

OK, I have used it on the lower bands, but there isn't a lot of advantage over CW unless the other station in not a CW op.  The JT9 fast modes with short cycle times give a much better chance of completion in a small number of reflections, but we can't use them so I guess ISCAT is the way to go.

Thanks for info Alan

Neil G4DBN


On 25/03/2020 19:27, Alan wrote:
Hi Neil,

Tony G4CBW and myself used to use ISCAT ...B on 3cm ?  I think,  on many occasions - usually worked very well for AS.

73 Alan GM0USI



07785744643

info@...

www.alandimmick.com

instagram @alandimmick

Studio 331

60-64 Osborne St

South Block

Glasgow

G1 5QH



Skew paths on 10GHz tonight

Neil Smith G4DBN
 

Some very odd beam headings for SM/OZ sigs on 10GHz this evening

I'm hearing OZ5SHF about 15 degrees south of true, and SM6VTZ was 9 degrees south. DL0SHF about 7 degrees south.  I can't hear GB3LEX direct, but there is a strong steady signal coming from 150 degrees, at least 45 degrees of the direct path. GB3CAM is normally S1/2 but now it is so loud, I heard it as S5 off the back of my dish. Direct it is S9+, but nil from anywhere further south.

Sadly, despite Chris being a decent signal for a while, he never had a strong enough signal from me to copy anything.  Still, 936km is a decent distance when there is 400ft of limestone in the path.

The duct has left me now.

Neil G4DBN

Re: HB9AMH SK

Mike Webb
 

My first HB on 70 and 23cm many years ago. Sad loss
--
Mike GD6ICR IO74PF73TW

Re: GB3FNY on 3cm?

G3UVR Denis IO83KH
 

Checking GB3FNY again just now it is normal strength S1 bobbing just above the noise. Just strong enough to be able to copy its CW  on a speaker. I use FNY and LEX to calibrate any error in my unlocked 3cm LO.

73 de Denis G3UVR

Re: GB3FNY on 3cm? ISCAT

Alan
 

Hi Neil,

Tony G4CBW and myself used to use ISCAT ...B on 3cm ?  I think,  on many occasions - usually worked very well for AS.

73 Alan GM0USI



07785744643

info@...

www.alandimmick.com

instagram @alandimmick

Studio 331

60-64 Osborne St

South Block

Glasgow

G1 5QH






From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Neil Smith G4DBN <neil@...>
Sent: 25 March 2020 15:39
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] GB3FNY on 3cm?
 

It has settled on 10368752.153 kHz, strength is normal (ish).  Hard to tell as it is so loud and so chopped about by the windfarms. Working at "work" work today so can't do any tx tests until this evening.

This is pointing the dish into a dense bush with the dish right down. Still dopplerised, like many of the weak sigs last night.

Extremely slow CW worked well. Tempted to suggest QRSS3 for the next contest if the signals are really weak, or even DFCW. Easier to "see" the traces than hear them, and with long integration times, the scintillation and chopping is smoothed out a bit. Does time-locked QRSS or DFCW count as "CW" for the permitted modes?

Has anyone tried ISCAT on 10GHz? I had a very good reflection from Martyn G3UKV when his tropo was inaudible.  Of course, there was no QSO detail in that transmission, Sod's Law.

I saw some VERY strong aircraft reflections from Peter G3PHO while he was beaming away from me, and the doppler shift was much wider and faster-changing than the usual mid-path oblique reflection. I guess that was from a plane coming towards Peter from the south on the same heading as to me.  I didn't see the plane on Airscout as it doesn't identify planes beyond the target. Might be an option for those who are on impossible paths, such as me trying to work to the south through my tree belt. Perhaps if I beam north with a bit of elevation and find a suitable plane or three, QSOs might be feasible. 

Neil G4DBN

On 25/03/2020 15:12, G3UVR Denis via Groups.Io wrote:
Just had a listen today. 25/03/2020. 70cm is on normal strength.

Cant hear 3cm but it can be exceptionally weak on warm dry days. Will try 3cm again tonight.

73 de Denis G3UVR


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Re: GB3FNY on 3cm?

Neil Smith G4DBN
 

It has settled on 10368752.153 kHz, strength is normal (ish).  Hard to tell as it is so loud and so chopped about by the windfarms. Working at "work" work today so can't do any tx tests until this evening.

This is pointing the dish into a dense bush with the dish right down. Still dopplerised, like many of the weak sigs last night.

Extremely slow CW worked well. Tempted to suggest QRSS3 for the next contest if the signals are really weak, or even DFCW. Easier to "see" the traces than hear them, and with long integration times, the scintillation and chopping is smoothed out a bit. Does time-locked QRSS or DFCW count as "CW" for the permitted modes?

Has anyone tried ISCAT on 10GHz? I had a very good reflection from Martyn G3UKV when his tropo was inaudible.  Of course, there was no QSO detail in that transmission, Sod's Law.

I saw some VERY strong aircraft reflections from Peter G3PHO while he was beaming away from me, and the doppler shift was much wider and faster-changing than the usual mid-path oblique reflection. I guess that was from a plane coming towards Peter from the south on the same heading as to me.  I didn't see the plane on Airscout as it doesn't identify planes beyond the target. Might be an option for those who are on impossible paths, such as me trying to work to the south through my tree belt. Perhaps if I beam north with a bit of elevation and find a suitable plane or three, QSOs might be feasible. 

Neil G4DBN

On 25/03/2020 15:12, G3UVR Denis via Groups.Io wrote:
Just had a listen today. 25/03/2020. 70cm is on normal strength.

Cant hear 3cm but it can be exceptionally weak on warm dry days. Will try 3cm again tonight.

73 de Denis G3UVR

Re: GB3FNY on 3cm?

G3UVR Denis IO83KH
 

Just had a listen today. 25/03/2020. 70cm is on normal strength.

Cant hear 3cm but it can be exceptionally weak on warm dry days. Will try 3cm again tonight.

73 de Denis G3UVR

Re: Circulator information anyone ?

f1ghb
 

Hello Martin,

For the first one , I have an old ( and small ) 1984 data book from RACAL MESL

For NDxxxx , N seems to be the band 1,7 to 2,3 Ghz and D seems the code for the isolators in that band ( logical with the arrow on the top of yours )

See here :  http://millimeterwave.free.fr/RACAL_F.htm

73s Eric



Le 25/03/2020 09:52, GM6VXB via Groups.Io a écrit :

Digging through my junk boxes looking for other things found two circulators of unknown origin

but suspect one is ex works and the other bought at a junk sale many years ago.


One is Black colour and marked: RACAL-MESL ND-3657 Serial number 374. No other markings except for an arrow on the top


The other is Grey: No manufacturer info. Two type numbers (maybe). MTG6002A (in Black) and MA7K962. Serial number 7501


Suspect one is for around 2.3GHz (the grey one) but no definate ideas.


Absolutely no information found on the InterWeb and no test equipment above 1.2GHz to test.


Anyone any information ?.


Martin, GM6VXB


Réf. : [UKMicrowaves] Circulator information anyone ?

F1CHF
 

I have this file for RACAL
hope this help
francois
 
 
 
 
 
-------Message original-------
 
Date : 25/03/2020 09:53:00
Sujet : [UKMicrowaves] Circulator information anyone ?
 

Digging through my junk boxes looking for other things found two circulators of unknown origin

but suspect one is ex works and the other bought at a junk sale many years ago.


One is Black colour and marked: RACAL-MESL ND-3657 Serial number 374. No other markings except for an arrow on the top


The other is Grey: No manufacturer info. Two type numbers (maybe). MTG6002A (in Black) and MA7K962. Serial number 7501


Suspect one is for around 2.3GHz (the grey one) but no definate ideas.


Absolutely no information found on the InterWeb and no test equipment above 1.2GHz to test.


Anyone any information ?.


Martin, GM6VXB

 

Circulator information anyone ?

GM6VXB
 

Digging through my junk boxes looking for other things found two circulators of unknown origin

but suspect one is ex works and the other bought at a junk sale many years ago.


One is Black colour and marked: RACAL-MESL ND-3657 Serial number 374. No other markings except for an arrow on the top


The other is Grey: No manufacturer info. Two type numbers (maybe). MTG6002A (in Black) and MA7K962. Serial number 7501


Suspect one is for around 2.3GHz (the grey one) but no definate ideas.


Absolutely no information found on the InterWeb and no test equipment above 1.2GHz to test.


Anyone any information ?.


Martin, GM6VXB

Re: GB3FNY on 3cm?

Neil Smith G4DBN
 

On 24/03/2020 18:30, David Redman wrote:
Graham
I think it is off also on 70cms so could be a site problem

Dave
G4IDR


On Tue, 24 Mar 2020, 17:51 Graham - G3YJR, <g3yjr@...> wrote:
I'm hoping my receiver hasn't packed up just before the SHF UKAC.

Can anyone else hear GB3FNY on 3cm?

BTW I hope to be activating 13cm & 3cm this evening.

Graham
-- 
Neil
http://g4dbn.uk

Re: GB3FNY on 3cm?

David Redman
 

Graham
I think it is off also on 70cms so could be a site problem

Dave
G4IDR


On Tue, 24 Mar 2020, 17:51 Graham - G3YJR, <g3yjr@...> wrote:
I'm hoping my receiver hasn't packed up just before the SHF UKAC.

Can anyone else hear GB3FNY on 3cm?

BTW I hope to be activating 13cm & 3cm this evening.

Graham

Re: GB3FNY on 3cm?

Neil Smith G4DBN
 

Kevin says Northern Powergrid now say after 8pm, things must be worse than they thought

Neil

On 24/03/2020 18:08, Graham - G3YJR wrote:
Tnx for the info re power cut at Finningley.

73 Graham
-- 
Neil
http://g4dbn.uk

Re: GB3FNY on 3cm?

Graham - G3YJR
 

Tnx for the info re power cut at Finningley.

73 Graham