Date   

Re: RS Yesterday

SAM JEWELL
 

Hi Chris,
I agree that the extra digit of the proposed system may be an encumbrance. I don't have any personal attachment to it so if a better system can be found, it has my acceptance.
I certainly don't have any problem with the nearest 10dB. That's still miles better than what we have today and anyway, the fading characteristics of most long haul VHF and above means that the signal is possibly changing over at least that amount, short term. We certainly don't want to get into statistical averaging or any-such.


I would have thought that a system that has a POSSIBLE 100dB range would be enough for all practical purposes, so that a single digit that denotes the 10dB block would be enough? The anomaly would be the change at the -100dBm point, so maybe we start with -140 and below as '0' and work up by 10dB to 9 (that has a nice comfortable feel) this would be -60 to -500dBm. Above -50 most (weak signal mode) signals would be so loud who needs  a reporting system? The suffix still represents the perceived propagation mode, e.g. A, R, S and maybe N. The DJ5BV signal would then have been 4S (-120 to -110dBm and S for rain scatter). An optimistic report would have been 5S!

Looking at this it is not such a big change from what we currently have, but the reference is reset and any argument that the increments are now 10dB whereas they were a finer 6dB before is already totally discredited. This system is at least meaningful.

I wonder what others think about the current system and possible changes to it? I haven't had much feedback to my column or DUBUS. Maybe most don't care? Keep on as we are?


73 de Sam, G4DDK






From: Christopher Bartram
To: ukmicrowaves@...
Sent: Tuesday, 26 May, 2009 2:49:27 PM
Subject: Re: [ukmicrowaves] RS Yesterday

Hello Sam

I was thinking about signal reporting during the 1.3GHz contest last week. One
problem which seems as though it needs addressing is the increased complexity
of the proposed system: a report in the dBm scale format requires four
characters eg. 123S. That's one more than the RST format...

If the dBm reporting scheme were to be slightly modified by rounding the
observed level to the nearest 10dB point, that would simplify matters. OK, the
accuracy would suffer, but it would then be possible to make reasonably
meaningful reports by ear.

A second way of condensing the report, I think unambiguously, without loosing
resolution, would be to remove the 'hundreds' character, so a report of eg.
23s would be most unlikely to be -23dBm or (at least with current technology
:-) ) -223dBm!

It would be a good idea to include a qualifier in the report which denotes that
the report is given aurally. An 'A' in place of the 'ones' character would do
nothing to reduce accuracy! So an report of a moderately strong RS signal
would perhaps be '2AS'. It wouldn't be very difficult to construct a series of
signal descriptions, like those used for the existing RST system, which would
probably result in more meaningful aural reports.

I agree completely with your and Arie's observations on current reporting
schemes. The reports given on the VHF/UHF/microwave bands are currently only
very slightly more meaningful than those given on HF!

Vy 73

Chris
GW4DGU




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Re: RS Yesterday

Christopher Bartram <cbartram@...>
 

Hello Sam

I was thinking about signal reporting during the 1.3GHz contest last week. One
problem which seems as though it needs addressing is the increased complexity
of the proposed system: a report in the dBm scale format requires four
characters eg. 123S. That's one more than the RST format...

If the dBm reporting scheme were to be slightly modified by rounding the
observed level to the nearest 10dB point, that would simplify matters. OK, the
accuracy would suffer, but it would then be possible to make reasonably
meaningful reports by ear.

A second way of condensing the report, I think unambiguously, without loosing
resolution, would be to remove the 'hundreds' character, so a report of eg.
23s would be most unlikely to be -23dBm or (at least with current technology
:-) ) -223dBm!

It would be a good idea to include a qualifier in the report which denotes that
the report is given aurally. An 'A' in place of the 'ones' character would do
nothing to reduce accuracy! So an report of a moderately strong RS signal
would perhaps be '2AS'. It wouldn't be very difficult to construct a series of
signal descriptions, like those used for the existing RST system, which would
probably result in more meaningful aural reports.

I agree completely with your and Arie's observations on current reporting
schemes. The reports given on the VHF/UHF/microwave bands are currently only
very slightly more meaningful than those given on HF!

Vy 73

Chris
GW4DGU


Re: RS Yesterday

SAM JEWELL
 

I'm not Richard. I was merely saying I would have given him an S9 (I did) yet he was measured at nearly 20dB lower. I have no idea how strong he was with others but I doubt he was any stronger than with me yet he received a number of S9 reports that I heard. That's all. No need to read anything more into it than that! I'm trying to raise some support for a more accurate reporting system as the current one is clearly flawed.

Sam




From: Richard Newstead
To: ukmicrowaves@...
Sent: Tuesday, 26 May, 2009 2:03:07 PM
Subject: [ukmicrowaves] Re: RS Yesterday

--- In ukmicrowaves@..., Sam wrote:

> This is interesting as Gerd was getting so many 59s reports. This >equates to about 19dB below an IARU definition of S9!
>
> I'm not raising this as any sort of issue but merely illustrating >how misleading the current 'S' system can be!

Sam

That is surely faulty logic. How can you possibly be sure that he was the same level with everyone else that he was with you?

(I fully accept the S meter point though!).

73

Richard
G3CWI



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my bad RX

Arie Dogterom <pa0ez@...>
 

I must confess that I have never ( not yet) been able to receive a station via rs with S9
73
Arie
 

----- Original Message -----
Sent: Tuesday, May 26, 2009 3:03 PM
Subject: [ukmicrowaves] Re: RS Yesterday

--- In ukmicrowaves@yahoogroups.com, Sam wrote:

> This is interesting as Gerd was getting so many 59s reports. This >equates to about 19dB below an IARU definition of S9!
>
> I'm not raising this as any sort of issue but merely illustrating >how misleading the current 'S' system can be!

Sam

That is surely faulty logic. How can you possibly be sure that he was the same level with everyone else that he was with you?

(I fully accept the S meter point though!).

73

Richard
G3CWI


Re: RS Yesterday

SAM JEWELL
 

I know Ari. You have long campaigned for a sensible system.
But I think the definition of VHF/Microwave S9 is set far too high for the reasons I gave in my column and DUBUS.

By any current, common, usage Gerd was 59S here yesterday. Yet by IARU definition he was considerably short of S9? I don't think I am wrong to send S9 if I believe that to be correct and what is expected, but the existing system is clearly unreliable as any sort of meaningful measurement of levels. A range of maybe 20 to 30dB is outrageous.
It was created  based on equipment standards of too many years ago. They need updating, IMHO.
System noise figures of 10 and 20dB, at VHF, belong in the past! A system based on those sorts of equipment sensitivities needs looking at again, surely?

73 de Sam, G4DDK

Flack jacket on.....................



From: Arie Dogterom
To: ukmicrowaves@...
Sent: Tuesday, 26 May, 2009 1:58:23 PM
Subject: Re: [ukmicrowaves] RS Yesterday



Hello Sam,
It is not the s-scale but the people giving reports out of their black hat. I am always worrying about my rx when reveiving s9 from stations I cannot give more than s4
regards
Arie
 
----- Original Message -----
From: Sam
Cc:
Sent: Tuesday, May 26, 2009 2:48 PM
Subject: Re: [ukmicrowaves] RS Yesterday


I tried my technique of level measurement on DJ5BVs strong RS signal. He measured up to -112dBm, although a little peak energy will have been lost in the Doppler sidebands.
This is interesting as Gerd was getting so many 59s reports. This equates to about 19dB below an IARU definition of S9!

I'm not raising this as any sort of issue but merely illustrating how misleading the current 'S' system can be!

2 new squares on 3cm. I love the rain!

And 2 new squares (and initials) on 13cm EME this morning.

73 de Sam

Not sent from my PC!

On 26 May 2009, at 12:35, "G3XDY" <g3xdy@btinternet. com> wrote:

One thing I noted in yesterday evening's good RS opening was the way that
dog-leg paths that normally don't seem to work were possible. I heard DJ5BV
(JO30) consistently on a heading of about 165 degrees, he would have been
beaming south of West so the path had a near right angle reflection,
similarly F6APE in IN97 (west south west of the scatter point) was worked on
the same heading. I also had a good backscatter contact with Neil G4BRK.
Signals were not huge, indicating that the losses were higher than on the
more direct paths, but it demonstrates that RS will work over significant
distances in any direction if the storm is sufficiently intense, regardless
of the path geometry.

73

John G3XDY

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Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-

Tony Gallagher <tony_g_ireland@...>
 

Ok,
All going to plan, I hope to be on 3 rock, just south of Dublin, about 1600feet ASL I think.
60cm Demi 10ghz with 2.5watts.
Should have 2m talkback, definately will have KST and Skype : tonygallagher_ei4ghb

Will aim to be there at 12 local time.

I can bring 23cm kit also if anyone would like to try!
I'll confirm via the refelctor later in the week.

Tony
EI4GHB

--- In ukmicrowaves@..., Robert Price <g8dtf@...> wrote:

Hi Tony & Richard

I will be on Winter hill on Sunday and I would be happy to try and see if we can make it. I was looking at the path the other day and it looks like a sea path, just grazing the north coast of Anglsey. I will be on ON4KST and I will have low power (10W) 144.175 talkback.

Let me know roughly when you will be around.

Gear is Downeast Microwave transverter 1.8W to a 45cm dish with a penny feed arrangement.

regards

Bob

 



________________________________
From: Richard Newstead <g3cwi@...>
To: ukmicrowaves@...
Sent: Monday, 25 May, 2009 16:28:01
Subject: [ukmicrowaves] Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-





--- In ukmicrowaves@ yahoogroups. com, "Tony Gallagher"
is there likely to be much activity?
Hi Tony

Last year there were a few stations active although many might be too far to work under normal conditions. You should stand a chance with Bob on Winter Hill IO83ro/rp. If I am certain that you will be there I could perhaps go to Anglesey (Holyhead Mountain). That would be a very easy hop and would give you Wales (it would be a poor choice for my wider contest ambitions though!). If you did want to try with me it would have to be right at the start of the contest so that I could relocate to somewhere better later in the day.

73

Richard
G3CWI


Re: RS Yesterday

Richard Newstead <g3cwi@...>
 

--- In ukmicrowaves@..., Sam <jewell@...> wrote:

This is interesting as Gerd was getting so many 59s reports. This >equates to about 19dB below an IARU definition of S9!

I'm not raising this as any sort of issue but merely illustrating >how misleading the current 'S' system can be!
Sam

That is surely faulty logic. How can you possibly be sure that he was the same level with everyone else that he was with you?

(I fully accept the S meter point though!).

73

Richard
G3CWI


triple

Arie Dogterom <pa0ez@...>
 

sorry for using too much space. Suddenly the system sends messages I thought were lost.
arie


Re: RS Yesterday

F6DRO
 

Hi all ,

it is also possible that there was some " ping pong " effect between
scatterers , so the 90deg offset was not real... During my latest xped in
JO10 I noticed a qso between F6DKW/JN18 and F5BUU/JN03. F6DKW turned to
JN38 scaterer and F5BUU to JN05 , looking like there was some chordal link
between JN38 and JN05.....

73
Dom/F6DRO


Re: RS Yesterday

Arie Dogterom <pa0ez@...>
 


Hello Sam,
It is not the s-scale but the people giving reports out of their black hat. I am always worrying about my rx when reveiving s9 from stations I cannot give more than s4
regards
Arie
 

----- Original Message -----
From: Sam
Sent: Tuesday, May 26, 2009 2:48 PM
Subject: Re: [ukmicrowaves] RS Yesterday


I tried my technique of level measurement on DJ5BVs strong RS signal. He measured up to -112dBm, although a little peak energy will have been lost in the Doppler sidebands.
This is interesting as Gerd was getting so many 59s reports. This equates to about 19dB below an IARU definition of S9!

I'm not raising this as any sort of issue but merely illustrating how misleading the current 'S' system can be!

2 new squares on 3cm. I love the rain!

And 2 new squares (and initials) on 13cm EME this morning.

73 de Sam

Not sent from my PC!

On 26 May 2009, at 12:35, "G3XDY" <g3xdy@btinternet.com> wrote:

One thing I noted in yesterday evening's good RS opening was the way that
dog-leg paths that normally don't seem to work were possible. I heard DJ5BV
(JO30) consistently on a heading of about 165 degrees, he would have been
beaming south of West so the path had a near right angle reflection,
similarly F6APE in IN97 (west south west of the scatter point) was worked on
the same heading. I also had a good backscatter contact with Neil G4BRK.
Signals were not huge, indicating that the losses were higher than on the
more direct paths, but it demonstrates that RS will work over significant
distances in any direction if the storm is sufficiently intense, regardless
of the path geometry.

73

John G3XDY

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

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Re: RS Yesterday

SAM JEWELL
 

I tried my technique of level measurement on DJ5BVs strong RS signal. He measured up to -112dBm, although a little peak energy will have been lost in the Doppler sidebands.
This is interesting as Gerd was getting so many 59s reports. This equates to about 19dB below an IARU definition of S9!

I'm not raising this as any sort of issue but merely illustrating how misleading the current 'S' system can be!

2 new squares on 3cm. I love the rain!

And 2 new squares (and initials) on 13cm EME this morning.

73 de Sam














Not sent from my PC!

On 26 May 2009, at 12:35, "G3XDY" <g3xdy@...> wrote:

One thing I noted in yesterday evening's good RS opening was the way that
dog-leg paths that normally don't seem to work were possible. I heard DJ5BV
(JO30) consistently on a heading of about 165 degrees, he would have been
beaming south of West so the path had a near right angle reflection,
similarly F6APE in IN97 (west south west of the scatter point) was worked on
the same heading. I also had a good backscatter contact with Neil G4BRK.
Signals were not huge, indicating that the losses were higher than on the
more direct paths, but it demonstrates that RS will work over significant
distances in any direction if the storm is sufficiently intense, regardless
of the path geometry.

73

John G3XDY



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

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Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

Brian Flynn GM8BJF
 

PS My personal beacon is on 10,368.080 +/- a bit of drift and should be audible in Livingston if you find a clear spot to the east.

Brian,
GM8BJF.

--- In ukmicrowaves@..., "Brian Flynn" <brian.flynn@...> wrote:

Hi Dave,

I could try 10 G and even 24 G if you are onTuesday or Weds

I am in Edinburgh (io85jv) but have a very clear take-off towards Glasgow


73s

Brian, GM8BJF


--- In ukmicrowaves@..., Dave Ackrill <dave.g0dja@> wrote:

Eddie G0EHV wrote:
Hello,

Both Rob (M0DTS) and myself (G0EHV) will be out /P on Sunday.
Not looking good for me I'm afraid to say.

Having thought I might be OK, as we wont be having my grand-daughter
over to stay that weekend, it's now less likely as my partners youngest
daughter has decided to 'organise' a party for Kate's birthday (which is
on Friday) involving various members of the family and Kate's
Grandchildren coming to our place over the weekend.

As with all of these sorts of chaotic events organised by someone else
at short notice I'm now not sure what's going to happen on Sunday.
However, I may persuade Kate that what she will want to do is have a lie
in on Sunday to get over the events and I'll nip out for a few hours to
play radio.

However, it's likely to have to be a local spot and not a commanding
altitude.

I also hope to do a trial of the larger dish in the week on a trip for
work up to Ayr, on Tuesday evening, and a place between Edinburgh and
Glasgow on Wednesday evening if I can get the gear sorted out on Monday.

Dave (G0DJA)


RS Yesterday

John Quarmby
 

One thing I noted in yesterday evening's good RS opening was the way that dog-leg paths that normally don't seem to work were possible. I heard DJ5BV (JO30) consistently on a heading of about 165 degrees, he would have been beaming south of West so the path had a near right angle reflection, similarly F6APE in IN97 (west south west of the scatter point) was worked on the same heading. I also had a good backscatter contact with Neil G4BRK. Signals were not huge, indicating that the losses were higher than on the more direct paths, but it demonstrates that RS will work over significant distances in any direction if the storm is sufficiently intense, regardless of the path geometry.

73

John G3XDY


Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

Brian Flynn GM8BJF
 

Hi Dave,

I could try 10 G and even 24 G if you are onTuesday or Weds

I am in Edinburgh (io85jv) but have a very clear take-off towards Glasgow


73s

Brian, GM8BJF

--- In ukmicrowaves@..., Dave Ackrill <dave.g0dja@...> wrote:

Eddie G0EHV wrote:
Hello,

Both Rob (M0DTS) and myself (G0EHV) will be out /P on Sunday.
Not looking good for me I'm afraid to say.

Having thought I might be OK, as we wont be having my grand-daughter
over to stay that weekend, it's now less likely as my partners youngest
daughter has decided to 'organise' a party for Kate's birthday (which is
on Friday) involving various members of the family and Kate's
Grandchildren coming to our place over the weekend.

As with all of these sorts of chaotic events organised by someone else
at short notice I'm now not sure what's going to happen on Sunday.
However, I may persuade Kate that what she will want to do is have a lie
in on Sunday to get over the events and I'll nip out for a few hours to
play radio.

However, it's likely to have to be a local spot and not a commanding
altitude.

I also hope to do a trial of the larger dish in the week on a trip for
work up to Ayr, on Tuesday evening, and a place between Edinburgh and
Glasgow on Wednesday evening if I can get the gear sorted out on Monday.

Dave (G0DJA)


Re: Scotland Trip

Gordon JC Pearce <gordon@...>
 

On Tue, 2009-05-26 at 11:52 +0100, Dave Ackrill wrote:
Gordon JC Pearce wrote:


Hi there, I'm new to the list and new to 3cm ;-)
Thanks for the suggestions and advice Gordon, it's been a while since I
was in Scotland and I've lost touch with the repeaters.

Unfortunately I wont have a car mounted antenna, but I'll look up the
frequencies of the repeaters you mentioned to see what I can hear and
work through.

Just finishing packing and starting out on the 5 hour (plus stops)
journey...
Well, I'll listen out this evening on AY then, if you're going to
Ayrshire first.

Gordon MM3YEQ


Re: Scotland Trip

Dave Ackrill <dave.g0dja@...>
 

Gordon JC Pearce wrote:

Hi there, I'm new to the list and new to 3cm ;-)
Thanks for the suggestions and advice Gordon, it's been a while since I was in Scotland and I've lost touch with the repeaters.

Unfortunately I wont have a car mounted antenna, but I'll look up the frequencies of the repeaters you mentioned to see what I can hear and work through.

Just finishing packing and starting out on the 5 hour (plus stops) journey...

Cheers - Dave (G0DJA)


Re: Scotland Trip

Gordon JC Pearce <gordon@...>
 

On Tue, 2009-05-26 at 10:31 +0100, Dave Ackrill wrote:

I'm not sure of the area, whether there's any good places to operate or
even how long I might have to be on air, but I shall take the 3cm
transverter, a couple of dishes and a small 2M/70cm antenna (the SOTA
beam) plus a couple of small 2M/70cm handhelds, if there are repeaters
that I can use, and the FT817 with me in case there's a chance and a
good spot to go to.
Hi there, I'm new to the list and new to 3cm ;-)

I'm up in Glasgow and I normally have either GB3CS or GB3AY on - AY is
down near Dalry so if you're in or about Ayr you'll get into it no
problem if you want a chat. There's also GB3PA but that's on the "wrong
side of the hill" for you in Ayr. Livingston is in the infamous
"Livingston Dip" where there's a hole in GB3CS's coverage, but you
should be okay with a car-mounted aerial. I'm not really active on 70cm
much, so I can't really comment on the 70cm repeaters.

I'm sure you know that there's GB3TC up near Kilsyth. From my home QTH
I've had only very limited success in hearing its beacon using a Sky LNB
and my TH-F7E with a homebrewed power tee. If I can tidy up the
construction a bit then I might take it out and see if I can hear you.

Gordon MM3YEQ


Scotland Trip

Dave Ackrill <dave.g0dja@...>
 

I'm off on a business trip for a couple of days, starting with Ayr today (site meeting tomorrow) and moving to Livingstone Wednesday night for a second site visit on Thursday and then back home.

I'm not sure of the area, whether there's any good places to operate or even how long I might have to be on air, but I shall take the 3cm transverter, a couple of dishes and a small 2M/70cm antenna (the SOTA beam) plus a couple of small 2M/70cm handhelds, if there are repeaters that I can use, and the FT817 with me in case there's a chance and a good spot to go to.

I will have the PC and access to the internet, as long as the Vodaphone signals are good enough, but experience tells me that using a PC in the car isn't ideal, so I will have my mobile phone with me on 07595 069056. This is my company number, so will be switched off when I'm in meetings but please respect the fact that I can't talk about Amateur Radio when I'm supposed to be at work. :-)

The gear set up isn't ideal either, as I've yet to sort out a decent way of mounting the dishes with the transveter and the IF radio, but I will do my best with what I have got to hand.

I'll be leaving home about mid-day so I'll look at my emails on here before I go in case anyone has any last minute suggestions for hills to go to that are not too difficult to get onto.

Hope to work someone, somewhere, over the next couple of days.

Cheers - Dave (G0DJA)


Re: Rain stops play

Robert Price <g8dtf@...>
 

Hi Richard
 
Well done on the new ODX. I had been a bit tied up in another project to get out yesterday. I have made a start on the preparation for the pump-up mast, which will mean I will be able to operate  from home more. I have made a sleeve for the sqare base of the mast out of UPVC cladding. I now need to dig a hole 1m square and 1.25m deep - then put concrete around the sleeve.
 
I have just been having a look at the weather forecast for next weekend (Cumulative) and there seems to be stable weather over the weekend. Hepburn is showing a good probability of tropo ducting over the weekend.
 
regards
 
Bob
G8DTF


From: Richard Newstead
To: ukmicrowaves@...
Sent: Monday, 25 May, 2009 22:32:41
Subject: [ukmicrowaves] Rain stops play

My plan for today was to make a top-loaded vertical for 500kHz and test it on a hilltop. I made an early start and thus when the rest of the family got up, they were treated to seeing me assembling the new aerial on the back lawn (a rather common sight here!). The aerial required some soldering and, while the iron was heating up, I idly switched the home 500kHz system on. Oh dear, the band was covered in static. Maybe 500kHz was a poor choice today after all. My fallback plan was to do some 2m SSB from a hilltop as DX-sherlock was showing a tropo opening into Scandinavia.

While packing up the aerial I though about the static crashes on 500kHz. It occurred to me that due to the daytime propagation on 500kHz that they must be from less than 1,000km away - probably a lot less. Thus I idly looked at the Met Office rain radar. I nearly fell off my chair when I saw a huge storm over SE England. All thoughts of 2m vanished. This looked like a 10G day instead.

I rapidly logged into KST and saw that DX was being worked from the SE of England and earlier that Gordon G0EWN had had some success. The storm history indicated that it might be useful for me shortly as it was moving north so I scrambled out with the 10G portable system. I had packed very quickly and as I drove into the hills I had the awful feeling that I must have forgotten something.

I soon set up and logged into KST. As I half expected, there was no DX reaching me at all. I hung about, did a few tests and in the end just worked Sam G4DDK and Neil G4BRK. A least it wasn't a wasted trip. I returned home, trimmed lawns etc.

In the early evening I again checked KST and saw an upsurge in activity. I noticed that John G4EAT had worked an OK portable at just over 900km on 10G and Rob M0DTS was out portable and had worked into Denmark. Of course neither of these events meant that there would be any propagation over here. A check of the rain radar showed a more encouraging picture with scattered storm cells. Then I had to decide whether to go portable for a second time or spend the evening watching the TV. For a moment I had a very rare enthusiasm failure. So many of these trips fail to yield anything. But 30 seconds later I decided yet again to pack and go. Five minutes afterwards I was in the car on the way out.

Light rain on the windscreen across the hills was not encouraging. My system is not suitable for wet weather. I arrived at my favourite local site and unpacked. It takes three minutes to set up the 10G portable system. The very first thing I do is power up the transverter so that by the time I have everything sorted out it is fairly stable.

I connected everything up and switched on the FT817. Immediately I heard a strong station calling CQ. I expected it to be Gordon G0EWN but it wasn't. It was Gerd DJ5BV at 59s. Somewhat excited, I dashed back to the car to find the keyer and paddle. For some reason I didn't actually expect Gerd to hear me but he did - first call. We easily completed for a new best DX for me at 688km. I could hear several other stations weakly but sadly no more DX contacts were made although I was heard briefly in France. I also contacted Rob M0DTS/p. Gerd was a huge signal for nearly an hour. At one stage he was so strong he was overloading the receiver and was audible on two frequencies.

Although I made just the one DX contact I was quite happy with the results given that my system is very small and low power (40cm dish and 1 Watt). Even 1,000km now looks quite possible on the right day!

It appears that 500kHz and 10G are quite a complimentary pairing of bands after all. If it is too noisy for 500kHz, 10G will probably be in good shape.

73

Richard
G3CWI



Re: Rain stops play

g0ewn191 <g0ewn191@...>
 

The 25th May certainly produced some interesting propagation. Well done Richard for sticking with it--operating /P is never easy, as those who do go portable will realise. Congrats on your new ODX 3cms.

Good conditions started to form the previous day and I worked stations on 23cms, including DK7QX JO42 and 3cms--PA2M JO21.

On the 25th I woke early and as things looked promising to check conditions. A number of 3cm beacons were 'end stop' including ON0RUG and DB0GHZ. GB3CAM was the strongest yet. Despite excellent conditions I only managed to work a couple of 23cm contacts. The summer months often produce good microwave conditions early in the morning---4.45am!! Only one station was around to test with on 3cms, OZ1FF; we worked at 539 both ways. After breakfast I left operating and, like Richard bussied myself with another 'project'; in my case a 5 element 6m yagi. (I had tested it the day before--first call with 2.5w from the trusty 817 produced EA1CJF via 'E' with the antenna resting on garden trellis just 2m over ground.Too easy!)

I had been watching the weather and knew of the storm system and possibilities for RS. Unfortunately for the early part of the day most of the potential scatterpoints were either too far or outside my azimuth window. However things looked more promising in the early evening. After listening for 30mins or so I located a scatterpoint scp and started to make contacts. For a change this included a number of French stations---normally difficult for this location. Gerd, DJ5BV was an excellent signal throughout the evening and must be one of the most active RS devotees around. The only problem was there were a number of scp's available at the same time. At one point the band was suffering qrm due perhaps a dozen or more people operating from the same scp in the 20kcs above .100 .

I was about to call a halt to operating when I heard a strong ssb sig --- it was Rob M0DTS who at times reached 59 with little if any RS distortion. My antenna was pointing S at the time--completely wrong direction for normal LOS to Rob.(6 degree elevation) Rob like Richard had gone /P on Rosedale in the N. York moors and like Richard Rob had been rewarded with a contact with Gerd.

Throughout the day the tropo signal from DB0GHZ was at 589 or better showing the N. Sea effect was also in place.

Gordon G0EWN