GB3SCC back on, GPS locked.

 

Nominal frequency 5760.9050068 MHz, witth the DFCW tones approximately 400 and 600Hz above this.   It uses the same "simple GPSDO" (Jupiter derived) for all three midband beacons, so expect to see a few parts in 10^-9 of frequency wander over tens of seconds to minutes 

 

I'm at John's. 'API, QTH at the moment where we can hear 'ZME and 'FNM too.  

Measured frequencies are :

 

GB3SCC  .90501(ref)

GB3ZME  .91290 

GB3FNM  .91641

 

These are subject to between 10 and 20Hz measurement error due to the rather poor frequency stability of the DB6NT local oscillator which shows several Hz drift in the time it takes to centre a tone frequency at the cursor on a waterfall display.

 

John is now thinking about GPS locking his receive system !

 

All reports greatfully received.

--
Andy  G4JNT
www.scrbg.org/g4jnt

 

ps.  In deference to Chris, the Bagpipes now send callsign only, and do not have any inter-character idle tone.

> I will listen for you on Thursday. KS to here is a distinct
>possibility on 10GHz.

Fine Sam. Kinder Scout it is! I will walk up from the Edale side at
set up in the mud at the summit (such as it is). KS is a huge plateau
so it may not go too well on 10G - it tends to underperform on VHF
too.

CU on 2m.

73

Richard

----- Original Message -----

From: Andy Talbot

To: ukmicrowaves@... ; uk_beacons@...

Sent: Wednesday, February 27, 2008 5:03 PM

Subject: [ukmicrowaves] 5.76GHz Beacons

GB3SCC back on, GPS locked.

 

Nominal frequency 5760.9050068 MHz, witth the DFCW tones approximately 400 and 600Hz above this.   It uses the same "simple GPSDO" (Jupiter derived) for all three midband beacons, so expect to see a few parts in 10^-9 of frequency wander over tens of seconds to minutes 

 

I'm at John's. 'API, QTH at the moment where we can hear 'ZME and 'FNM too.  

Measured frequencies are :

 

GB3SCC  .90501(ref)

GB3ZME  .91290 

GB3FNM  .91641

 

These are subject to between 10 and 20Hz measurement error due to the rather poor frequency stability of the DB6NT local oscillator which shows several Hz drift in the time it takes to centre a tone frequency at the cursor on a waterfall display.

 

John is now thinking about GPS locking his receive system !

 

All reports greatfully received.

--
Andy  G4JNT
www.scrbg.org/g4jnt

 

ps.  In deference to Chris, the Bagpipes now send callsign only, and do not have any inter-character idle tone.

----- Original Message -----

From: usuallyqrt

To: ukmicrowaves@...

Sent: Wednesday, February 27, 2008 2:25 PM

Subject: [ukmicrowaves] Re: GB3SCC is QRV once again

I can confirm reception of GB3SCC in Winchester on backscatter
between 14.00 & 14.20 today. Weak but solid signal beaming 110deg
towards Butser thats around 130deg away from the correct direction.
I'm on the east side of a hill just in case your wondering why I dont
look the correct way. MP3 in the files section for a while if you
wish to listen.
73s john

--- In ukmicrowaves@yahoogroups.com, "pjm" ...> wrote:
>
> Hi all,
>
> John API and Andy JNT are currently up at Bell Hill IO80UU59
> re-installing the beacon, its on air at the moment. Its now on
> 5760.905 and is GPS locked. I'm sure Andy will chip in with some
more
> info later.
>
> If you are within VHF range, perhaps give them a shout on 144.625FM.
>
> regards,
>
> Paul M0EYT.
>

Dear all

The forecast is set fair for tomorrow so I intend activating another
hill on 10GHz. Possibles are Kinder Scout or Moel Famau (full details
below). I expect to be QRV around 1100z. Will anyone be about? Usual
2m talkback. Four 10G contacts would be great!

http://new.sotawatch.org/summits.php?summit=G/SP-001

http://new.sotawatch.org/summits.php?summit=GW/NW-044

Will post last minute details here and on KST tmw.

Mobile 07976-688359.

Tips on working lightweight portables here:

http://www.sotabeams.co.uk/Downloads/Life%20in%20the%20Zone.pdf

73

Richard
G(W)3CWI

Richard

As well as the technical aspects of propagation, there's another
aspect, which is activity. The weekend of 5th/6th July falls nicely
into the window that Sam has identified for S-R, and for the UK it is
VHF NFD weekend, 50MHz - 1.3GHz. But the stations in mainland Europe
don't stop at 1.3GHz - there are many stations that have 2.3GHz, 10GHz
and other bands as well. Under 'flat' conditions there are many very
strong stations on 1.3GHz, of which you would almost certainly be able
to work some on 10GHz. If conditions are up - well - it could be a
great weekend, regardless of whether there be tropo, S-R or otherwise.

Not sure if there will be a VHF NFD station at JO02ST this year,
nothing has been decided yet. But the addition of a 10GHz station on
site could certainly make it more interesting!

1st weekend in May is of course another high activity weekend on all
bands, 10GHz included.

regards

Grant


--- In ukmicrowaves@yahoogroups.com, "Richard Newstead" <g3cwi@...> wrote:

I have strong familiy ties with Norfolk - where I grew up. Thus each summer I normally spend a week of so there sailing and playing on the radio (of course). My favourite site is on the cliffs at JO02ST. Thinking ahead to this summer my mind turned to the possibility of some North Sea DXing on 10GHz.
Are there any good references to read that cover over-sea ducts? I am interested in how best to couple into them (spacial considerations), diurnal variations, predictive techniques etc. Are there any seaside beacons that I might listen for - perhaps in Denmark?

73

Richard
G3CWI

I have strong familiy ties with Norfolk - where I grew up. Thus each
summer I normally spend a week of so there sailing and playing on the
radio (of course). My favourite site is on the cliffs at JO02ST.
Thinking ahead to this summer my mind turned to the possibility of
some North Sea DXing on 10GHz.

Are there any good references to read that cover over-sea ducts? I am
interested in how best to couple into them (spacial considerations),
diurnal variations, predictive techniques etc. Are there any seaside
beacons that I might listen for - perhaps in Denmark?

73

Richard
G3CWI

Hello all,
we will be QRV /P this weekend from 3 locations
in JN29, JO10 and JO20. Callsign will change between
grids to adhere to the (old-fashioned) non-rover rules.
Bands 23-13-6-3-1.2 are in decent shape. KST talkback.
23-13 should be ok to G on Sunday am.
Hope for some decent wx
73 xtof ON4IY
bart_ghz wrote:

Hello to you all,

Last weekend I tested my 3cm gear and all seems to work.Made 2 qso's
(ON and F).This weekend,if the weather is not to bad,I hope to be
active again during the VHF/UHF contest.I will only have 3 cm and
internet (KST,and mayby skype if my pc can handle it).

The portable locatoion will be JO20SS.The system will be an 70cm dish
and 3W in the feed.
Callsign will be on7bv/p I hope to hear/work some of the UK stations.

Next time I'll hope to have 23 cm also,but I still have to build the
pa and make a smaller antenna.The 1,5m parabolic dish is a bit to
large to put up with the current portable setup.

regards
on7bv

Yahoo! Groups Links

Hello to you all,

Last weekend I tested my 3cm gear and all seems to work.Made 2 qso's
(ON and F).This weekend,if the weather is not to bad,I hope to be
active again during the VHF/UHF contest.I will only have 3 cm and
internet (KST,and mayby skype if my pc can handle it).

The portable locatoion will be JO20SS.The system will be an 70cm dish
and 3W in the feed.
Callsign will be on7bv/p I hope to hear/work some of the UK stations.

Next time I'll hope to have 23 cm also,but I still have to build the
pa and make a smaller antenna.The 1,5m parabolic dish is a bit to
large to put up with the current portable setup.

regards
on7bv



Of course I forgot to say its for 24GHz
Mark

----- Original Message -----
*From:* Mark GM4ISM <mailto:gm4ism@bigfoot.com>
*To:* ukmicrowaves@yahoogroups.com
<mailto:ukmicrowaves@yahoogroups.com>
*Sent:* Sunday, February 24, 2008 11:32 AM
*Subject:* [ukmicrowaves] DB6NT Preamp



Hi all,
Does anyone have a copy (preferably electronic) of the cct diagram
for the early DB6NT 3 stage preamp, (the one with discrete couplic
caps)
I have a couple of bare boards, and want to get them running.
What gain and nf should I get from one of these correctly aligned?
(WG input version)
Thanks
Mark GM4ISM

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