Date   

More JT4 off the moon Thanks for all that high efficiency reflector junk left up there by the landings!

SAM JEWELL
 

Folks,
A follow up to yesterday's JT4 tests with WW2R, off the moon, on 23cm

System here up to 200W and 2.3 meter dish. Mostly around 150W output for JT modes

System at WW2R. Remote operated up to 400W and 3.0 m dish. Mostly operated around 200W output for JT modes


We resolved the timing issue between us. It wasn't that which prevented decodes on JT4G yesterday.

Still no decodes on JT4G today. Path degradation at its lowest today according to Moonsked. Dave's signal very visible on SpecJT even at 200W output.
CW would have been difficult (for me at least)

Changing to JT65C decodes were close to 100%. A full QSO with lots of short random messages very successful.

We then changed to JT4E. This time it worked almost 100%. Full QSO on JT4E

Initial Conclusions
The new JT4G decoder doesn't seem to be extending the detection threshold to -23dB for 23cm EME. Since our best reports were about -17 and averaging -20dB for this part of the session it is perhaps not surprising JT4G didn't supply any decodes (either direction).

JT4E extends the detector to about -19dB. This seems to have been confirmed by the success on this mode today.

Maybe, although we don't see the spread so much on SpecJT, the JT4G (and other 4 modes) were actually spread more than is visible?
Maybe the problem is the doppler on the signal? The QSO took place about one hour after transit here. My doppler would have been close to maximum. Although the spreading may have been low, it was almost impossible with the TS2KX RIT to keep the traces vertical. The doppler would have 'spread' the energy, in one over, to maybe as much as 50Hz. I haven't calculated the doppler at transit plus 1 hour yet.

So, most interesting. When Skype (used to co-ord our activity) dropped out at Dave's end JT4E provided the only reliable link between us so lots of short messages carried without error!

Clearly, 23cm digital modes EME is quite viable between small backyard dishes of 2.3m and 3m diameter with modern low noise preamps and around 150 to 200W RF (in the shack)! At low degradation times of the month even CW will work well between these size dishes and system parameters.

73 de Sam, G4DDK





From: Ray
To: ukmicrowaves@...
Sent: Tuesday, 21 July, 2009 1:04:17 PM
Subject: [ukmicrowaves] Re: Tonight - Microwave Activity Night, 7/20/2009, 8:00 pm

--- In ukmicrowaves@..., Peter Day
> Please look for me operating as G2AS/P from Sheffield Amateur Radio Club tonight (approx 1930-2100).
> Calls wil be much appreciated as I'm trying to convert some club members to move higher than their 432MHz handhelds :-)
> I'll also have mobile KST running for those who dont like calling CQ on 23cm :-)
> Peter G3PHO


Came on to try and support Peter's effort but guess he had some generator problems?
Used the time waiting to good effect to address a question of RTTY activity and decided to give the mode a try on 23cm for the first time.
Russ G4PBP and myself set up a schedule. Russ started with a long string of RY's that enabled me to pan the signal and line it up on the MMTTY decode markers but my initial impression of the received audio (horrendous flutter) was to consider this wasn't going to work.
Initially just got jibberish on the screen, Russ's suggestion to try hitting the reverse control sorted that problem. I noted there is also an ability to take account of fluttery signals so that was pressed into service as well. The end result was a remarkably solid contact. We've agreed to give SSTV a try next time!
I'd be interested to see how RTTY or FSK441 works with a contact dependent on aircraft reflection, using timed periods each way. 
Taking on board the conclusions some of you have reached so far on JT4, my own opinion is that it will be of greatest benefit to those for whom CW is not a mode of operation, in particular if using lower power levels and not being aircraft reflection dependant.
Without exception, all my JT4G contacts and failed contacts could have been completed easily on SSB or CW and in the case of the failed attempt with Chris GW4DGU, we could have had several contacts. 

73 Ray GM4CXM




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New 13cm Personal Beacon

Ray <gm4cxm@...>
 

QSP from Ian GM0UHC

Hi All,

I have just installed a 13cm personal beacon.
Frequency is 2319.995+/-5KHz until it stabilises.
Power into feed (6m of FSJ4-50B) . . . ~3W
Antenna . . . JBeam Type 7362, horizontal polarisation, 60 degrees
beamwidth.
Beam Heading . . . 45 degrees . . . aiming at Forth Bridges.
Location . . . IO85FW.

Purpose . . . to 'squirt' a signal in the general direction of LA/SM/OZ whilst at the same time, exploring the scattering from the bridge metalwork. This has proved extremely effective on 23cm and 9cm.

Signal reports obviously welcome, especially from stations West of
IO85FW who are recommended to point at the Forth Bridges . . .
obviously.

73, Ian GM0UHC


Re: Tonight - Microwave Activity Night, 7/20/2009, 8:00 pm

SAM JEWELL
 

WW2R and I had some questions over our results off the moon on JT4G yesterday, so we are going to try again, later today.
Specifically, timings seemed to be 'odd' although both of us are network synchronised. We will keep a better watch on the Delta T figure. Can I remind those of you using JT modes that you need to ensure your timing is spot on. I can recommend Dimension4 as a pretty good free timing source for your PC.
Hoping to get on this evening.
73 de Sam



From: Ray
To: ukmicrowaves@...
Sent: Tuesday, 21 July, 2009 1:04:17 PM
Subject: [ukmicrowaves] Re: Tonight - Microwave Activity Night, 7/20/2009, 8:00 pm

--- In ukmicrowaves@..., Peter Day
> Please look for me operating as G2AS/P from Sheffield Amateur Radio Club tonight (approx 1930-2100).
> Calls wil be much appreciated as I'm trying to convert some club members to move higher than their 432MHz handhelds :-)
> I'll also have mobile KST running for those who dont like calling CQ on 23cm :-)
> Peter G3PHO


Came on to try and support Peter's effort but guess he had some generator problems?
Used the time waiting to good effect to address a question of RTTY activity and decided to give the mode a try on 23cm for the first time.
Russ G4PBP and myself set up a schedule. Russ started with a long string of RY's that enabled me to pan the signal and line it up on the MMTTY decode markers but my initial impression of the received audio (horrendous flutter) was to consider this wasn't going to work.
Initially just got jibberish on the screen, Russ's suggestion to try hitting the reverse control sorted that problem. I noted there is also an ability to take account of fluttery signals so that was pressed into service as well. The end result was a remarkably solid contact. We've agreed to give SSTV a try next time!
I'd be interested to see how RTTY or FSK441 works with a contact dependent on aircraft reflection, using timed periods each way. 
Taking on board the conclusions some of you have reached so far on JT4, my own opinion is that it will be of greatest benefit to those for whom CW is not a mode of operation, in particular if using lower power levels and not being aircraft reflection dependant.
Without exception, all my JT4G contacts and failed contacts could have been completed easily on SSB or CW and in the case of the failed attempt with Chris GW4DGU, we could have had several contacts. 

73 Ray GM4CXM




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Re: Tonight - Microwave Activity Night, 7/20/2009, 8:00 pm

Ray <gm4cxm@...>
 

--- In ukmicrowaves@..., Peter Day <microwaves@...> wrote:

Please look for me operating as G2AS/P from Sheffield Amateur Radio Club tonight (approx 1930-2100).
Calls wil be much appreciated as I'm trying to convert some club members to move higher than their 432MHz handhelds :-)
I'll also have mobile KST running for those who dont like calling CQ on 23cm :-)
Peter G3PHO

Came on to try and support Peter's effort but guess he had some generator problems?
Used the time waiting to good effect to address a question of RTTY activity and decided to give the mode a try on 23cm for the first time.
Russ G4PBP and myself set up a schedule. Russ started with a long string of RY's that enabled me to pan the signal and line it up on the MMTTY decode markers but my initial impression of the received audio (horrendous flutter) was to consider this wasn't going to work.
Initially just got jibberish on the screen, Russ's suggestion to try hitting the reverse control sorted that problem. I noted there is also an ability to take account of fluttery signals so that was pressed into service as well. The end result was a remarkably solid contact. We've agreed to give SSTV a try next time!
I'd be interested to see how RTTY or FSK441 works with a contact dependent on aircraft reflection, using timed periods each way.
Taking on board the conclusions some of you have reached so far on JT4, my own opinion is that it will be of greatest benefit to those for whom CW is not a mode of operation, in particular if using lower power levels and not being aircraft reflection dependant.
Without exception, all my JT4G contacts and failed contacts could have been completed easily on SSB or CW and in the case of the failed attempt with Chris GW4DGU, we could have had several contacts.

73 Ray GM4CXM


Re: Yet more bits for sale - 18 GHz Frequency counter

Conrad Farlow <conrad@...>
 

Ok then how about 80 plus post- it's got to be worth that. Prefer selling on here than on eBay. I also have a JFW industries step attenuator 10dB total in 1dB steps, sma connectors. Spec here: http://jfwindustries.thomasnet.com/item/manual-variable-attenuators/manual-variable-attenuators-2/50r-248?&seo=110
I'd like 20 for it

Conrad

Conrad Farlow wrote:

I have an Anritsu MS75B repeater checker which incorporates an 18 GHz frequency counter which gives 0.1 Hz resolution, a 10 MHz ref oscillator an ML73B power meter and a MA72A power sensor which did work but I killed it with a TWT! I believe that OZ8AFC may have a head for sale for around 200 Euro. There is also a signal generator which never worked. So basically it's a nice carry case with a good frequency counter and a 10 MHz OCXO in it. I would like 120 ono plus postage, it is pretty heavy!

I also have an HP-432A power meter which works well 60 ono, no power head.

73

Conrad G0RUZ


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Fw: Re: West Coast uWave Marathon: 26 July

Martyn G3UKV
 

GM
Just a reminder for the "West Coast uWave Marathon" this coming Sunday (26 July), 10:00 am to 16:00 (local time).
We shall be operating GW3ZME/P from Cefn Du, IO83DF, around 347 MASL, south of Llandudno in N. Wales.
QRV 3cm and 24cm ATV (wideband). Two stations on 3cm.
2 metre talkback (FM 144.750 +/- and 144.175 MHz SSB)
Other stations G3SMU and The Wirral Gang have said they hope to be active too, in addition to those listed in the June edition of Scatterpoint (Pg. 15).
 
Time to dust off and remove spiders from those Solfan head units and modified LNBs !
 
73  Martyn G3UKV, Dave G8VZT


TONIGHT - RSGB 1.3/2.3GHz Activity Contest, 7/21/2009, 7:00 pm

ukmicrowaves@...
 

Reminder from:   ukmicrowaves Yahoo! Group
 
Title:   TONIGHT - RSGB 1.3/2.3GHz Activity Contest
 
Date:   Tuesday July 21, 2009
Time:   7:00 pm - 9:30 pm
Repeats:   This event repeats every month on the third Tuesday.
Notes:   RSGB 1.3/2.3GHz Activity Contest. Exchange is serial number and locator. 1900-2130z.
 
Copyright © 2009  Yahoo! Inc. All Rights Reserved | Terms of Service | Privacy Policy


Re: EI3IX now active on 10ghz

Russ Stewart <g4pbp@...>
 

Tony Gallagher wrote:

Thanks for that Ralph,

73s

Tony

--- In ukmicrowaves@... <mailto:ukmicrowaves%40yahoogroups.com>, "Ralph Bird" <Ralph.Bird@...> wrote:

Hello Tony,

I will be more than happy to test with you most days of the week
except friday's.
I am located in IO70VL 15km NW of Plymouth on the Cornish side
of the border.
Please email me for any skeds if you need to do any tests.
73
ph> Ralph
G4ALY
----- Original Message -----
From: Tony Gallagher
To: ukmicrowaves@...
<mailto:ukmicrowaves%40yahoogroups.com>
Sent: Monday, July 20, 2009 11:25 AM
Subject: [ukmicrowaves] EI3IX now active on 10ghz


Hi,
Joe, EI3IX is now opperational on 10Ghz. We had a short QSO in
IO53KU yesterday, 19th July. Only a short distance of a few miles, signal levels of 59++ were exchanged. John EI7FAB hopes to have his kit opperational within the next week also.

73's

Tony
EI4GHB
Hi Tony I can try anytime, I you would pass on my Skype details andEmail.

Russ ... g4pbp


July RSGB Low Bands UK Activity Contest - Reminder

Ray <gm4cxm@...>
 

Hi all,
The July 23cm/13cm UK Activity Contest takes place tomorrow, Tuesday 21st July between 8pm and 10.30pm local time.

I will be QRV on 23cm, 150w, 4x44.
Talkback on ON4KST.

Fingers crossed for another bumper evening of activity.

73 Ray GM4CXM


Re: EI3IX now active on 10ghz

Tony Gallagher <tony_g_ireland@...>
 

Thanks for that Ralph,

73s

Tony


--- In ukmicrowaves@..., "Ralph Bird" <Ralph.Bird@...> wrote:

Hello Tony,

I will be more than happy to test with you most days of the week
except friday's.
I am located in IO70VL 15km NW of Plymouth on the Cornish side
of the border.
Please email me for any skeds if you need to do any tests.
73
ph> Ralph
G4ALY
----- Original Message -----
From: Tony Gallagher
To: ukmicrowaves@...
Sent: Monday, July 20, 2009 11:25 AM
Subject: [ukmicrowaves] EI3IX now active on 10ghz


Hi,
Joe, EI3IX is now opperational on 10Ghz. We had a short QSO in IO53KU yesterday, 19th July. Only a short distance of a few miles, signal levels of 59++ were exchanged. John EI7FAB hopes to have his kit opperational within the next week also.

73's

Tony
EI4GHB


Re: Extremely off the earth....

SAM JEWELL
 

Sounds interesting. Please keep me posted. I hope to have a bit more time later this year.
73 de Sam



On 20 Jul 2009, at 15:29, "Graham Shirville" <g.shirville@...> wrote:


Hi Sam,
 
Well I am listening to the Apollo 11 audio "in real time" whilst drafting a press announcement a new, UK funded,  amateur radio satellite project which will be released at the AMSAT-UK Colloquium this coming Saturday.
 
Not in the same league as Apollo of course but exciting none the less:)
 
best 73
 
Graham G3VZV
----- Original Message -----
From: SAM JEWELL
Sent: Monday, July 20, 2009 3:14 PM
Subject: Re: [ukmicrowaves] Extremely off the earth....

 

To celebrate the 40th anniversary of the first moon landing I ran some tests with WW2R today on 23cm EME.
In spite of signal levels that we confidently expected to work, there was not a single decode on JT4G or even on JT4E. Moving to JT65C it was 100% decode.
Signal levels were strong enough for us to have what may have been our first 23cm CW QSO as well. I need to check my log. Reports on CW were just Os but that is enough.
Interestingly, Dave operated his station completely remotely from his office in Richardson. I guess he got in early!
Dave will post a more complete report on the two moon reflectors later today and post results to Joe for analysis.

So, very interesting. How are you going to celebrate the 40th anniversary of man's greatest achievement?    

73 de Sam

Man, that new Cake Tin choke ring on the feed sure works.............real gastronomic development work!



Re: Tonight - Microwave Activity Night, 7/20/2009, 8:00 pm

Peter Day <microwaves@...>
 

Please look for me operating as G2AS/P from Sheffield Amateur Radio Club tonight (approx 1930-2100).

Calls wil be much appreciated as I'm trying to convert some club members to move higher than their 432MHz handhelds :-)

I'll also have mobile KST running for those who dont like calling CQ on 23cm :-)


Peter G3PHO




ukmicrowaves@... wrote:

Reminder from: ukmicrowaves Yahoo! Group http://groups.yahoo.com/group/ukmicrowaves/cal
Tonight - Microwave Activity Night Monday July 20, 2009 8:00 pm - 9:00
pm (This event repeats every week.)
Notes: Monday nights are traditionally microwave activity nights. Why
not try listening around at 20:00 local time? Better still, call CQ!
Consider using KST to co-ordinate activities:
http://www.on4kst.com/chat/start.php


Re: Extremely off topic!

Peter Day <microwaves@...>
 

Vinyl lives!


"Ya can't get high on CD... " (Neil Young)



Peter G3PHO

PS Does this mean you've got rid of your Val Doonican albums Ray ;-)



Ray wrote:
Hi all, If like me you enjoy listening to music of very different
origins, no longer have a record deck but have amassed lots of 33/45rpm
records that now just gather dust, fed up buying albums/CD's of which
<large snip>

73 Ray GM4CXM


Re: Extremely off the earth....

Ralph
 


Excellent Sam,
I was up late last night watching archive films on just that subject, Also
radio 4 has had some very interesting items on it. I have a lot of NASA books
on the subject and still find it facinating to this day.
73
Ralph

----- Original Message -----
From: SAM JEWELL
Sent: Monday, July 20, 2009 3:14 PM
Subject: Re: [ukmicrowaves] Extremely off the earth....

 

To celebrate the 40th anniversary of the first moon landing I ran some tests with WW2R today on 23cm EME.
In spite of signal levels that we confidently expected to work, there was not a single decode on JT4G or even on JT4E. Moving to JT65C it was 100% decode.
Signal levels were strong enough for us to have what may have been our first 23cm CW QSO as well. I need to check my log. Reports on CW were just Os but that is enough.
Interestingly, Dave operated his station completely remotely from his office in Richardson. I guess he got in early!
Dave will post a more complete report on the two moon reflectors later today and post results to Joe for analysis.

So, very interesting. How are you going to celebrate the 40th anniversary of man's greatest achievement?    

73 de Sam

Man, that new Cake Tin choke ring on the feed sure works.............real gastronomic development work!



Re: Extremely off the earth....

Graham Shirville <g.shirville@...>
 


Hi Sam,
 
Well I am listening to the Apollo 11 audio "in real time" whilst drafting a press announcement a new, UK funded,  amateur radio satellite project which will be released at the AMSAT-UK Colloquium this coming Saturday.
 
Not in the same league as Apollo of course but exciting none the less:)
 
best 73
 
Graham G3VZV

----- Original Message -----
From: SAM JEWELL
Sent: Monday, July 20, 2009 3:14 PM
Subject: Re: [ukmicrowaves] Extremely off the earth....

 

To celebrate the 40th anniversary of the first moon landing I ran some tests with WW2R today on 23cm EME.
In spite of signal levels that we confidently expected to work, there was not a single decode on JT4G or even on JT4E. Moving to JT65C it was 100% decode.
Signal levels were strong enough for us to have what may have been our first 23cm CW QSO as well. I need to check my log. Reports on CW were just Os but that is enough.
Interestingly, Dave operated his station completely remotely from his office in Richardson. I guess he got in early!
Dave will post a more complete report on the two moon reflectors later today and post results to Joe for analysis.

So, very interesting. How are you going to celebrate the 40th anniversary of man's greatest achievement?    

73 de Sam

Man, that new Cake Tin choke ring on the feed sure works.............real gastronomic development work!



Re: Extremely off the earth....

SAM JEWELL
 

To celebrate the 40th anniversary of the first moon landing I ran some tests with WW2R today on 23cm EME.
In spite of signal levels that we confidently expected to work, there was not a single decode on JT4G or even on JT4E. Moving to JT65C it was 100% decode.
Signal levels were strong enough for us to have what may have been our first 23cm CW QSO as well. I need to check my log. Reports on CW were just Os but that is enough.
Interestingly, Dave operated his station completely remotely from his office in Richardson. I guess he got in early!
Dave will post a more complete report on the two moon reflectors later today and post results to Joe for analysis.

So, very interesting. How are you going to celebrate the 40th anniversary of man's greatest achievement?    

73 de Sam

Man, that new Cake Tin choke ring on the feed sure works.............real gastronomic development work!



Tonight - Microwave Activity Night, 7/20/2009, 8:00 pm

ukmicrowaves@...
 

Reminder from:   ukmicrowaves Yahoo! Group
 
Title:   Tonight - Microwave Activity Night
 
Date:   Monday July 20, 2009
Time:   8:00 pm - 9:00 pm
Repeats:   This event repeats every week.
Notes:   Monday nights are traditionally microwave activity nights. Why not try listening around at 20:00 local time? Better still, call CQ! Consider using KST to co-ordinate activities:

http://www.on4kst.com/chat/start.php
 
Copyright © 2009  Yahoo! Inc. All Rights Reserved | Terms of Service | Privacy Policy


Extremely off topic!

Ray <gm4cxm@...>
 

Hi all,
If like me you enjoy listening to music of very different origins, no longer have a record deck but have amassed lots of 33/45rpm records that now just gather dust, fed up buying albums/CD's of which only 2 or 3 tracks come up to your expectations, then this is for you.
Personally I prefer 60's/70's pop, popular rock (not heavy!), folk music, early C&W and a bit of bluegrass.
Recently I was watching the BBC "Click" programme and it mentioned the first P2P software to be acceptable to the music industry had been launched initially in the UK, USA will follow later this year.
Spotify provides a free listening service of CD quality music streaming (not downloaded) to your PC. You search for whoever you want to listen to and can list either all the singles or total albums tracks the singer or group have ever issued.
Spotify has certainly changed the way we listen to music in our house now. Just listening to all of Marianne Faithfull's library as I type this!

73 Ray GM4CXM


Re: gb3lex

Ralph
 

Hello Russ,
 
No sign of LEX so far this morning, I may just have been lucky last
night.
The Met Bracknell pressure chart reminds me of Tony Hancock in
the film where he was an artist riding around a large canvass full of
paint on a bicycle. hi.
I will report any more reports to the cluster if I hear it again.
73
Ralph 

----- Original Message -----
Sent: Monday, July 20, 2009 11:03 AM
Subject: [ukmicrowaves] gb3lex

 

Hi guys I have measured GB3LEX at 10368.94454 MHz now the gps has
stabilised. It's now a 'stonking' 56N on the new antenna.

GB3CEM measured at 10368.87940 i.e. 600hz low. I will adjust it when I
get a chance.

Russ ... g4pbp


Re: EI3IX now active on 10ghz

Ralph
 

Hello Tony,
 
I will be more than happy to test with you most days of the week
except friday's.
I am located in IO70VL 15km NW of Plymouth on the Cornish side
of the border.
Please email me for any skeds if you need to do any tests.
73
Ralph
G4ALY

----- Original Message -----
Sent: Monday, July 20, 2009 11:25 AM
Subject: [ukmicrowaves] EI3IX now active on 10ghz

 

Hi,
Joe, EI3IX is now opperational on 10Ghz. We had a short QSO in IO53KU yesterday, 19th July. Only a short distance of a few miles, signal levels of 59++ were exchanged. John EI7FAB hopes to have his kit opperational within the next week also.

73's

Tony
EI4GHB