Date   

Re: JT9-F Fast Via QO100

Andy G4JNT
 

Good oh.    I'll leave it running throughout the day. Then think about the next stage.  Probably randomising the burst timing.

Not sure about the decode capabilities of WSJT-X with this mode - the Tol setting doesn't seem to stack-up with the real allowed tuning offset, and the fast modes of JT9 are virtually undocumented in the WSJT-X manual.   I get the feeling they were just stuck on as an afterthought.

I was hoping for something that would work mobile, with Doppler shift, so perhaps the next test stage will be to randomise a frequency offset by a few hundred Hz each transmission.   Then, of course, use dynamic coding to transmit changing LOC information and go out for a drive a using higher power amp and omni antenna. 
I've already shown that JT9D is totally and utterly useless with the Doppler from any speed faster than about walking pace



Virus-free. www.avg.com


On Wed, 30 Dec 2020 at 11:22, Denis Stanton G0OLX <Stantondenis@...> wrote:
Andy
Good morning
Decoding off of the Goonhilly SDR no problem
112130 -5 1.7  700 @ G4JNT JT9FAST
Best 73's

Denis
G0OLX

On Wed, Dec 30, 2020 at 10:46 AM John Fell <john.g0api@...> wrote:
Starts 6 secs into decode cycle sweep.
Visible/audible - no decodes so far - going walkabout now .

John
G0API

On Wed, 30 Dec 2020 at 09:46, Andy G4JNT <andy.g4jnt@...> wrote:
After Monday's test, here's another one, a bit more difficult this time
Same frequency   - 10489.9842 MHz dial  (within a few hundred Hz, anyway)
Mode JT9F-Fast - this is the next one up from Monday's test that on on teh narrower -E

Now the tricky bit - it's a 6 second burst every 30 seconds with no short bit of carrier to see this time.   The burst (at the moment) sits at about 04 and 34 seconds so I suggest using a 30s cycle time to monitor.


Virus-free. www.avg.com


Re: JT9-F Fast Via QO100

Denis Stanton G0OLX
 

Andy
Good morning
Decoding off of the Goonhilly SDR no problem
112130 -5 1.7  700 @ G4JNT JT9FAST
Best 73's

Denis
G0OLX


On Wed, Dec 30, 2020 at 10:46 AM John Fell <john.g0api@...> wrote:
Starts 6 secs into decode cycle sweep.
Visible/audible - no decodes so far - going walkabout now .

John
G0API

On Wed, 30 Dec 2020 at 09:46, Andy G4JNT <andy.g4jnt@...> wrote:
After Monday's test, here's another one, a bit more difficult this time
Same frequency   - 10489.9842 MHz dial  (within a few hundred Hz, anyway)
Mode JT9F-Fast - this is the next one up from Monday's test that on on teh narrower -E

Now the tricky bit - it's a 6 second burst every 30 seconds with no short bit of carrier to see this time.   The burst (at the moment) sits at about 04 and 34 seconds so I suggest using a 30s cycle time to monitor.


Virus-free. www.avg.com


Re: Unknown signal on 1296.030 ish

Colin Ranson
 

Hi David,

 

Was confusing it with Tot Hill, east of BSE, I remember Bar Hill now, lots of new road there now.

 

Good luck with finding source of signal, can’t help with a beam heading, had 23cm antenna down for a refurb, awaiting raising party – but with Covid might be a while.

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: david656179 via groups.io
Sent: 30 December 2020 10:47
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Unknown signal on 1296.030 ish

 

No, Bar Hill is 8 Km NW of CAMBRIDGE.  I am going to thaw out my 23 cm stuff and see if I can hear this thing.

Somebody must be able to identify this signal surely?  Or is it, as i have suggested to him,  top secret and coming from Baldock?

 


Re: Article headers

militaryoperator
 

Ah, there you go. Pays to watch CSI and the forensic analysis of headers and the like. 

Your probably right Lou, I usually just click return to get the group address, must put it in memory, then strip title and content and add what I want. 

Must learn to do it properly it seems, silly me. 

Never showed up here though as anything other than the message I intended. 


73 and HNY.

Ben. 



-----Original Message-----
From: Lou Blasco <vk3alb@...>
To: UKMicrowaves@groups.io
Sent: Tue, 29 Dec 2020 23:39
Subject: Re: [UKMicrowaves] Article headers

Hi Ben,

Is it possible you hit reply to my message then modified the subject line? If I look at the headers from our emails it looks like you replied to my message ID.

Part of your message

Date: Tue, 29 Dec 2020 12:12:53 +0000 (UTC)
From: "militaryoperator via groups.io" <Military1944@...>
Reply-To: UKMicrowaves@groups.io
To: "UKMicrowaves@groups.io" <UKMicrowaves@groups.io>
Message-ID: <1670784016.5299960.1609243973891@...>
In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
References: <NchP.1609239978902492360.Q4ZP@groups.io>
Subject: [UKMicrowaves] ocxo ?
MIME-Version: 1.0
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io



Re: Unknown signal on 1296.030 ish

david656179
 

No, Bar Hill is 8 Km NW of CAMBRIDGE.  I am going to thaw out my 23 cm stuff and see if I can hear this thing.

Somebody must be able to identify this signal surely?  Or is it, as i have suggested to him,  top secret and coming from Baldock?


Re: JT9-F Fast Via QO100

John Fell
 

Starts 6 secs into decode cycle sweep.
Visible/audible - no decodes so far - going walkabout now .

John
G0API

On Wed, 30 Dec 2020 at 09:46, Andy G4JNT <andy.g4jnt@...> wrote:
After Monday's test, here's another one, a bit more difficult this time
Same frequency   - 10489.9842 MHz dial  (within a few hundred Hz, anyway)
Mode JT9F-Fast - this is the next one up from Monday's test that on on teh narrower -E

Now the tricky bit - it's a 6 second burst every 30 seconds with no short bit of carrier to see this time.   The burst (at the moment) sits at about 04 and 34 seconds so I suggest using a 30s cycle time to monitor.


Virus-free. www.avg.com


Re: Article headers

Lou Blasco
 

Hi Trevor,

Thanks for your reply. I don't have an issue with the email threading, I see exactly what you see, separate emails. I only made comment because mine was one of the two emails involved. I was looking for a possible reason why Brian might see them threaded in his email client, he mentions the possibility of editing subject lines in his email.

Regards

Lou
VK3ALB

On 30/12/2020 9:01 PM, M5AKA via groups.io wrote:
Lou, the threads are separate on the groupsio site, see https://groups.io/g/UKMicrowaves/topics

also emails here were separate threads, suggests it’s your email client that is the problem.

73 Trevor M5AKA 








On Tuesday, 29 December 2020, 23:39:37 GMT, Lou Blasco <vk3alb@...> wrote:


Hi Ben,

Is it possible you hit reply to my message then modified the subject line? If I look at the headers from our emails it looks like you replied to my message ID.

Part of your message

Date: Tue, 29 Dec 2020 12:12:53 +0000 (UTC)
From: "militaryoperator via groups.io" <Military1944@...>
Reply-To: UKMicrowaves@groups.io
To: "UKMicrowaves@groups.io" <UKMicrowaves@groups.io>
Message-ID: <1670784016.5299960.1609243973891@...>
In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
References: <NchP.1609239978902492360.Q4ZP@groups.io>
Subject: [UKMicrowaves] ocxo ?
MIME-Version: 1.0
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io

Part of my message

Subject: [UKMicrowaves] Farnell PG102 manual
To: UKMicrowaves@groups.io
From: "Lou Blasco via groups.io" <vk3alb@...>
X-Originating-Location: Belmont, Victoria, AU (182.239.182.68)
X-Originating-Platform: Windows Chrome 87
User-Agent: GROUPS.IO Web Poster
MIME-Version: 1.0
Date: Tue, 29 Dec 2020 03:06:18 -0800
Message-ID: <NchP.1609239978902492360.Q4ZP@groups.io>
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io
The key is here
Yours: In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
Mine:  Message-ID: <NchP.1609239978902492360.Q4ZP@groups.io> 
Brian's email program probably reads the headers and uses this information to thread them together.

Regards

Lou
VK3ALB

On 30/12/2020 8:10 AM, militaryoperator via groups.io wrote:
Brian,
the lazy-bones are hijacking threads. The original PG102 email, that you
mentioned, was replied to to make an ocxo question, thereby hijacking
the thread.
73, Stay Safe,
Robin, G8DQX



Sorry Robin. My original question was not a reply to anything. 
oxo.jpg
Confused. Ben.



W1GHZ Multiplier pcbs

geoffrey pike
 

A few months ago Sam had some W1GHZ pcbs that he uncovered after a tidy up, i got some of them and just last week 
got around to putting the bits in. Essentially 3 x NLB310 mmic and some passives and two 15mm end stops with 6 BA 
tuning screws.
The pcb can be used a a amplifier over the tuning range of the end caps and performed well at 10.368 GHz, however when 
being used as x4 multiplier the results where very good (well i think so !)
Either 2556 or 2484 MHz at about 13dBm gives 10dBm out at either 9936/10224 MHz. Tuning was very easy and by no means
fussy. also hand effects where notably less of a problem. I will probably need to adjust the tuning when put into a suitable enclosure.
However Paul's axiom of gain is cheap works here as the pcb is FR4 nought fancy at all. So his 3cm transverter designs use these ideas and almost certainly is a very practical way of getting to 3cms affordable. The picture left to right is the ADF4351 signal source followed by a MCL VNA-25 mmic to raise the level for multiplier use and then the x4 multiplier and then off the the meter.
cheers
Geoff
GI0GDP
Inline image


Re: Article headers

M5AKA
 

Lou, the threads are separate on the groupsio site, see https://groups.io/g/UKMicrowaves/topics

also emails here were separate threads, suggests it’s your email client that is the problem.

73 Trevor M5AKA 








On Tuesday, 29 December 2020, 23:39:37 GMT, Lou Blasco <vk3alb@...> wrote:


Hi Ben,

Is it possible you hit reply to my message then modified the subject line? If I look at the headers from our emails it looks like you replied to my message ID.

Part of your message

Date: Tue, 29 Dec 2020 12:12:53 +0000 (UTC)
From: "militaryoperator via groups.io" <Military1944@...>
Reply-To: UKMicrowaves@groups.io
To: "UKMicrowaves@groups.io" <UKMicrowaves@groups.io>
Message-ID: <1670784016.5299960.1609243973891@...>
In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
References: <NchP.1609239978902492360.Q4ZP@groups.io>
Subject: [UKMicrowaves] ocxo ?
MIME-Version: 1.0
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io

Part of my message

Subject: [UKMicrowaves] Farnell PG102 manual
To: UKMicrowaves@groups.io
From: "Lou Blasco via groups.io" <vk3alb@...>
X-Originating-Location: Belmont, Victoria, AU (182.239.182.68)
X-Originating-Platform: Windows Chrome 87
User-Agent: GROUPS.IO Web Poster
MIME-Version: 1.0
Date: Tue, 29 Dec 2020 03:06:18 -0800
Message-ID: <NchP.1609239978902492360.Q4ZP@groups.io>
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io
The key is here
Yours: In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
Mine:  Message-ID: <NchP.1609239978902492360.Q4ZP@groups.io> 
Brian's email program probably reads the headers and uses this information to thread them together.

Regards

Lou
VK3ALB

On 30/12/2020 8:10 AM, militaryoperator via groups.io wrote:
Brian,
the lazy-bones are hijacking threads. The original PG102 email, that you
mentioned, was replied to to make an ocxo question, thereby hijacking
the thread.
73, Stay Safe,
Robin, G8DQX



Sorry Robin. My original question was not a reply to anything. 
oxo.jpg
Confused. Ben.


JT9-F Fast Via QO100

Andy G4JNT
 

After Monday's test, here's another one, a bit more difficult this time
Same frequency   - 10489.9842 MHz dial  (within a few hundred Hz, anyway)
Mode JT9F-Fast - this is the next one up from Monday's test that on on teh narrower -E

Now the tricky bit - it's a 6 second burst every 30 seconds with no short bit of carrier to see this time.   The burst (at the moment) sits at about 04 and 34 seconds so I suggest using a 30s cycle time to monitor.


Virus-free. www.avg.com


Re: Unknown signal on 1296.030 ish

Colin Ranson
 

Is that Bar Hill Nr Bury St Edmunds ?    I get  low level multitone things in several places over 23cms.

 

Colin G8LBS Ipswich..

 

Sent from Mail for Windows 10

 

From: Mark - M1MPW
Sent: 30 December 2020 00:23
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Unknown signal on 1296.030 ish

 

Hi All, 

I've been receiving the following signal about s3 in Bar Hill on and off most evenings.
Link to file here:
https://1drv.ms/u/s!AiEXawJdr6xkok1dasBIIfEuvM9U

There is also an image at the same time on  432.010 but only just above the background noise.

Both beams on a heading of 220 degrees.
Possibly could be Bovingdon L band radar?

Appears very stable in frequency compared with a gps locked source.

 


Re: Unknown signal on 1296.030 ish

Jules - M0UGA
 
Edited

I would agree with Robin that it's highly unlikely to be the Bovingdon radar.

The attached screenshot is of a 10Mhz 'slice' centred on 1296Mhz and between the two carrier frequencies (1265/1310Mhz) that the Bovingdon radar uses.

The bright blue horizontal lines are transient noise that correlate with the circa 5 second 360 degree rotation time when the radar was beaming directly at me from roughly 400 yards away.

The video that is also attached displays the carrier frequencies of the Radar in a more recognisable format.

If you have access to an SDR such as a cheap RTL-SDR, then having a play with the freely available 'Universal Radio Hacker" software might ellicit some further clues to the source.

There's another primary radar to the north of Stansted at Debden, which is significantly closer to Bar Hill but as Robin says a steady FSK or similar signal is highly unlikely to be radiating from that either.


Re: Unknown signal on 1296.030 ish

Robin Szemeti - G1YFG
 

Doesn't sound like a radar to me, I would expect significant pulses from a radar rather than a FSK.


On Wed, 30 Dec 2020 at 00:23, Mark - M1MPW <bigfathairybiker@...> wrote:
Hi All, 

I've been receiving the following signal about s3 in Bar Hill on and off most evenings.
Link to file here:
https://1drv.ms/u/s!AiEXawJdr6xkok1dasBIIfEuvM9U

There is also an image at the same time on  432.010 but only just above the background noise.

Both beams on a heading of 220 degrees.
Possibly could be Bovingdon L band radar?

Appears very stable in frequency compared with a gps locked source.


--
Robin Szemeti - G1YFG


Unknown signal on 1296.030 ish

Mark - M1MPW
 

Hi All, 

I've been receiving the following signal about s3 in Bar Hill on and off most evenings.
Link to file here:
https://1drv.ms/u/s!AiEXawJdr6xkok1dasBIIfEuvM9U

There is also an image at the same time on  432.010 but only just above the background noise.

Both beams on a heading of 220 degrees.
Possibly could be Bovingdon L band radar?

Appears very stable in frequency compared with a gps locked source.


Re: Article headers

Lou Blasco
 

Hi Ben,

Is it possible you hit reply to my message then modified the subject line? If I look at the headers from our emails it looks like you replied to my message ID.

Part of your message

Date: Tue, 29 Dec 2020 12:12:53 +0000 (UTC)
From: "militaryoperator via groups.io" <Military1944@...>
Reply-To: UKMicrowaves@groups.io
To: "UKMicrowaves@groups.io" <UKMicrowaves@groups.io>
Message-ID: <1670784016.5299960.1609243973891@...>
In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
References: <NchP.1609239978902492360.Q4ZP@groups.io>
Subject: [UKMicrowaves] ocxo ?
MIME-Version: 1.0
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io

Part of my message

Subject: [UKMicrowaves] Farnell PG102 manual
To: UKMicrowaves@groups.io
From: "Lou Blasco via groups.io" <vk3alb@...>
X-Originating-Location: Belmont, Victoria, AU (182.239.182.68)
X-Originating-Platform: Windows Chrome 87
User-Agent: GROUPS.IO Web Poster
MIME-Version: 1.0
Date: Tue, 29 Dec 2020 03:06:18 -0800
Message-ID: <NchP.1609239978902492360.Q4ZP@groups.io>
Precedence: Bulk
List-Unsubscribe: <https://groups.io/g/UKMicrowaves/unsub>
Sender: UKMicrowaves@groups.io
The key is here
Yours: In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
Mine:  Message-ID: <NchP.1609239978902492360.Q4ZP@groups.io> 
Brian's email program probably reads the headers and uses this information to thread them together.

Regards

Lou
VK3ALB

On 30/12/2020 8:10 AM, militaryoperator via groups.io wrote:
Brian,
the lazy-bones are hijacking threads. The original PG102 email, that you
mentioned, was replied to to make an ocxo question, thereby hijacking
the thread.
73, Stay Safe,
Robin, G8DQX



Sorry Robin. My original question was not a reply to anything. 
Confused. Ben.


Re: Article headers

militaryoperator
 

Brian,
the lazy-bones are hijacking threads. The original PG102 email, that you
mentioned, was replied to to make an ocxo question, thereby hijacking
the thread.
73, Stay Safe,
Robin, G8DQX



Sorry Robin. My original question was not a reply to anything. 
oxo.jpg
Confused. Ben.


Re: Article headers

G8DQX list
 

Brian,

the lazy-bones are hijacking threads. The original PG102 email, that you mentioned, was replied to to make an ocxo question, thereby hijacking the thread.

73, Stay Safe,

Robin, G8DQX

On 29/12/2020 20:18, Brian Howie GM4DIJ wrote:
Is it my e-mail client or are people modifying subject lines to create new topics ?  The oxco thread is being threaded with the PG102 one.

Message-ID: <1670784016.5299960.1609243973891@mail.yahoo.com>
In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
References: <NchP.1609239978902492360.Q4ZP@groups.io>

Cheers

Brian GM4DIJ


Article headers

Brian Howie GM4DIJ
 

Is it my e-mail client or are people modifying subject lines to create new topics ? The oxco thread is being threaded with the PG102 one.

Message-ID: <1670784016.5299960.1609243973891@mail.yahoo.com>
In-Reply-To: <NchP.1609239978902492360.Q4ZP@groups.io>
References: <NchP.1609239978902492360.Q4ZP@groups.io>

Cheers

Brian GM4DIJ
--
Brian Howie


Re: ocxo ?

Adrian G4UVZ
 

I recently purchased this unit on Ebay for the GB3KBQ upgrade .....tunes equally either side of 10 MHz ..good quality item

uk/itm/10MHz-Frequency-OCXO-Board-Constant-Temperature-Crystal-Oscillator-Sine-Wave/283995359041?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D396db80303b54452b2e3680930c9349b%26pid%3D100675%26rk%3D1%26rkt%3D15%26mehot%3Dnone%26sd%3D283995359041%26itm%3D283995359041%26pmt%3D1%26noa%3D1%26pg%3D2380057%26brand%3DUnbranded&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A3a3c0491-49fc-11eb-9aff-fa637c2bc1bd%7Cparentrq%3Aaf9194511760a4d729840e43ffd9c852%7Ciid%3A1


Re: ocxo ?

Chris Ruddy MM0KOS
 

Hi Ben

 

Someone else had tried the same thing, you can read here... https://groups.io/g/qrp-tech/topic/26199901#17701

 

Chris MM0KOS

 

Sent from Mail for Windows 10

 

From: militaryoperator via groups.io
Sent: 29 December 2020 12:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] ocxo ?

 

Thinking of adding an ext ref to my Kuhne, 

 

has anyone tried this: OSC5A2B02 OCXO  ?

its a little smaller than the ones I have already and available on a pcb on eBay. 

 

Ben

 

https://dl6gl.de/media/files/ocxo-cti-osc5a2b02-datasheet.pdf

 

 

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

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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