Date   

Response to same old southern sites criticism in Digest 3988

usuallyqrt <usuallyqrt@...>
 

Yesterday saw the 24G and up activity and two new paths at least were worked in the south by G8KQW and G8ACE. Of particular interest I think was Butser to Povington on 76GHz which although is not a UK distance record for 76GHz is now the longest known all over land path worked at 92Km distance. Another southern station had calculated yesterdays atmospheric absorption losses for 76GHz at 0.6db/Km so it should be realised this was a particularly challenging contact given the very low Tx power available and poorer Rx performances so it did take a while to complete as dish alignment had to be absolutely precise. One degree change in dish alignment vertical as well as horizontal losing the signal. 47GHz was also worked on this path for the first known time (until challenged) where with more power this was easily accomplished and 24GHz took a matter of moments to complete. The activity postings didn't indicate any 47 or 76GHz being offered north of Watford and the primary interest with these contacts yesterday was to learn more about advancing our millimetric experience than racing through stationary holiday traffic to use other sites. The overall activity level in any case was not not conducive to roving operation. Maybe the rules need changing if the sole object is to just complete as many contacts as possible.
For the technically minded my 24GHz equipment had no new technical inovations so could be regarded and criticised as using the same old kit. 47GHz I used an injection locked 150mW Birkett Gunn diode mounted in an ex BT parametric amp pump source and this was the first dx use for this QRO? equipment. 76GHz used a beam lead diode Tx doubler with a DB6NT LNA on Rx with both 76G equipments using 30cm cassegrain antennas.
Regards & 73s John G8ACE


Re: OFCOM - DRAFT RESPONSE FOR COMMENT

Gary M1EGI
 

I also sent mine last night...

Gary (M1EGI)


Re: OFCOM - DRAFT RESPONSE FOR COMMENT

David Wrigley <zen130696@...>
 

Thanks Murray,

Mine's now emailed

David G6GXK

On 19/07/2013 14:42, g6jyb wrote:
Thanks for all inputs so far

THE RSGB DRAFT REPOSNSE IS NOW ONLINE

Web page:
http://rsgb.org/main/operating/band-plans/microwaves/spectrum-release/

Short Link:
http://rsgb.org/main/files/2013/07/draft-response-v2.pdf

This may be used for your own ideas as well as for comments back to me on substance and typos

Please note there are items in this draft that so far may have been missed in other considerations inc on:-

a) the answer to Q1,
b) impact on European amateurs, if the bands are lost
c) the 2300-2310 option offer
d) a wider range of other measures that would complement the technical support offer that I am glad UKuG and BATC are up for

As with other efforts I would be glad of formal endorsements by UKuG, BATC and Amsat-UK who have contributed to various aspects

regards

Murray

Based on feedback we will update it add boilerplate etc prior to teh 5pm Monday deadline

--- In ukmicrowaves@yahoogroups.com, "Michael Scott" <g3lyp@...> wrote:


Water resistant connectors

Christopher Bartram <cbartram@...>
 

I still use 7-pin XLRs for my 10 and 24GHz portable kit, and my 'big' dish used and will once again use 4-pin XLRs for the DC drives to the azimuth and elevation motions. But, I've had problems with the 7-pin variety when used to supply power to preamps on the old tower.

Even with the sort of 'rain shield' Mike suggests, I had severe problems with electrolytic erosion of pins on 7-pin XLRs carrying DC, and I didn't have to put up with the salty atmosphere that Roger experiences. If Roger says sealed connectors are OK on the island of salt-spray and airborne dishes, I believe him!

Wearing my nautical hat, I wouldn't use Buccaneers in a marine environment. I once lost the connection to my masthead lights within seven days of fitting new Buccaneers as through-deck fittings, and there wasn't even any current flowing through them! You may have a different experience, of course.

My brother uses yottie-type sealed deck connectors on his boat, and they seem to survive being sloshed with sea water reasonably well. One source is <www.brianwards.co.uk/ online-shop/ electrical/ deck-connectors-and-glands.html>

I hope that's useful to someone.

Vy 73

Chris
GW4DGU

  


Activity list for the 5.7/10/24GHz Contests on Sunday 28th July

John Quarmby
 

The third of the summer series of 5.7GHz, 10GHz and 24GHz contests is coming up next Sunday, 28th July, you can choose any 6 hour time slot from 0700-1900 BST, either as one continuous period or two segments with at least an hour's gaps between.

As usual I will collate an activity list, so please send me your operating plans. Lets hope for some rainscatter to liven things up this time!

The preferred format is as below:

Callsign: G3XDY
Locator: JO02OB
Bands: 5.7GHz 15W 60cm dish
10GHz 10W 60cm dish
Talkback: ON4KST and 144.175MHz
Times: Probably early and late in the day.


73

John G3XDY
UkuG Contest Manager


Re: Water resistant connectors

John Quarmby
 

I have used Buccaneer and Mini-Buccaneers for up to 13 years with no problems, but I agree some variants are expensive, and the full size Buccaneers are rather large.
Despite looking for alternatives I haven't found much that compares well with them.

I see that Rapid sell the micro-Buccaneer range (0400 series) at about 3-4 per plug/socket.
http://www.rapidonline.com/Cables-Connectors/Micro-Buccaneer-400-series-connectors-63566

73

John G3XDY

On 21/07/2013 06:24, Neil Whiting wrote:
Any suggestions for connectors for outdoor preamp and transverter cables?
I need 4way and 8way (ish).
I used to use Buccaneers but the price is getting silly - also they were
big and
didn't work particularly well.

I've contemplated ethernet cables, as the cost of a new one each year
for 10 years would still show a saving :-)

73,
Neil G4BRK


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

Yahoo! Groups Links




Re: Water resistant connectors

Mike Willis
 

I would use normal XLR connectors but make sure water can't get to them by using some sort of rain shield - e.g. with a plastic box underneath the main box for connectors with a hole in the lid to allow the cables through - or even no lid at all. The wind in Oxfordshire does not blow the rain upwards very often (unlike Mull) so as long as the box is deep enough the connectors won't get wet and even if they do they will dry quickly. This does not protect against condensation but mine seemed to last OK. SSB pre-amps use the same technique.

Mike

--- In ukmicrowaves@yahoogroups.com, Roger Blackwell GM4PMK <gm4pmk@...> wrote:

I would also recommend the Lumberg series of connectors. Even the
plating is not too bad after 3 years in the damp salt-laden air here.
Westlakes 7-way cable is essentially vehicle trailer lighting cable and
has proved very tough and damage resistant here.
It has 6 x 1mm sq and 1 x 2mm sq cables. 100m comes on a nice wooden
drum too.

73

--

Roger Blackwell GM4PMK

www.marsport.org.uk


Re: Potential Rainscatter to JN15ish

Martyn G3UKV
 

Naturally -
MIV G3UKV

On 21/07/2013 11:25, Christopher Bartram


"Of course you'll be expected to have written your reply to the Ofcom
Consultation before turning your rig on ..."

Vy 73

Chris
GW4DGU



Re: Water resistant connectors

Roger Blackwell GM4PMK
 

I would also recommend the Lumberg series of connectors. Even the plating is not too bad after 3 years in the damp salt-laden air here.
Westlakes 7-way cable is essentially vehicle trailer lighting cable and has proved very tough and damage resistant here.
It has 6 x 1mm sq and 1 x 2mm sq cables. 100m comes on a nice wooden drum too.

73

--

Roger Blackwell GM4PMK

www.marsport.org.uk


Potential Rainscatter to JN15ish

Christopher Bartram <cbartram@...>
 

Checking the weather, I've noticed that there is very heavy rain forecast for the area to the south of the Cotentin peninsula early this evening. From IO71 that could potentially give QSOs down into the Pyrenees. I hope some of the mmWavers also read this ... I wish I'd had the time to do the mods to my 24GHz system ...

Of course you'll be expected to have written your reply to the Ofcom Consultation before turning your rig on ...

Vy 73

Chris
GW4DGU


Re: Water resistant connectors

Ian White
 


Any suggestions for connectors for outdoor preamp and transverter
cables?
I need 4way and 8way (ish).
I used to use Buccaneers but the price is getting silly - also they
were big
and didn't work particularly well.
How about the Lumberg series of IP67/68 DIN connectors, eg Farnell
121-2141?

I've contemplated ethernet cables, as the cost of a new one each year
for 10
years would still show a saving :-)
The main problem with Ethernet cables is the small wire diameter; even
with spare cores paralleled, they aren't much good for carrying DC power
over a long distance.

"Rotator cable" from Westlake is a good alternative at reasonable cost,
and is available in the numbers of cores that you need (although the
8-core would need to be spliced down to a smaller diameter to fit the
connectors mentioned above).


73 from Ian GM3SEK


Water resistant connectors

Neil Whiting <neil@...>
 

Any suggestions for connectors for outdoor preamp and transverter cables?
I need 4way and 8way (ish).
I used to use Buccaneers but the price is getting silly - also they were big and
didn't work particularly well.

I've contemplated ethernet cables, as the cost of a new one each year
for 10 years would still show a saving :-)

73,
Neil G4BRK


AMSAT-UK Colloquium Videos Now Available Online

M5AKA
 

Thanks to the hard work of volunteers from the British Amateur Television Club (BATC) videos of the presentations given to the AMSAT-UK International Space Colloquium held in Guildford, July 20-21, 2013 are now available to download or watch online.

See http://amsat-uk.org/2013/07/20/amsat-uk-colloquium-videos-now-available/

Live Webcast of International Space Colloquium continues Sunday, July 21
http://amsat-uk.org/2013/07/18/webcast-of-international-space-colloquium/

The Colloquium schedule (times in BST, GMT+1) can be seen at
http://tinyurl.com/2013ColloquiumSchedule

----
73 Trevor M5AKA
AMSAT-UK website http://amsat-uk.org/
Facebook https://www.facebook.com/pages/AMSAT-UK/208113275898396
Twitter https://twitter.com/AMSAT_UK
----


Live webcast from AMSAT-UK Space Colloquium

M5AKA
 

Live web streaming this weekend from AMSAT-UK International Space Colloquium.

Already covered 2.4 GHz ISS DATV transmitter and 2.4 GHz to 10 GHz linear transponder for Geostationary orbit.

Presentations continue until 3pm Sunday. To watch this weekends presentations live see

http://amsat-uk.org/2013/07/18/webcast-of-international-space-colloquium/

Trevor M5AKA
http://amsat-uk.org/


Live webcast from AMSAT-UK Space Colloquium

M5AKA
 

Live web streaming this weekend from AMSAT-UK International Space Colloquium.

Already covered 2.4 GHz ISS DATV transmitter and 2.4 GHz to 10 GHz linear transponder for Geostationary orbit.

Presentations continue until 3pm Sunday. To watch this weekends presentations live see

http://amsat-uk.org/2013/07/18/webcast-of-international-space-colloquium/

Trevor M5AKA
http://amsat-uk.org/


Re: 24GHz, 47GHz, and 76-248GHz Contests next weekend, 21st July

Martyn G3UKV
 

Apologies for re-send - but Yahoo seems to be delaying this topical msg when earlier mailings are included. So I've cut them right down, back to John's original...

Hi Peter, Keith, Chris, Roger et al
Been studying potential paths re 24 GHz.
So....
Start at Brown Clee (IO82QL84), around 0930 (UTC). Path to JO01EP maybe ????(with lift!) + IO81LS, IO93FB, IO93AD likely
Rove to Little Wenlock area (IO82RQ60). Paths to IO81LS, IO93AD, IO93AF08 maybe. Middle of day.
Rove to Redhill or New Works (IO82TQ16, IO82SQ01). Paths to Alport, Cat & Fiddle and more.  Later in afternoon. (Say 15:00 ?)

Lots of room for new paths there, and lots of '....perhaps...'. Any other suggestions ?
Trust the microwave group pick up the diesel fuel bill for participants ? (just to see who reads this...!)
Any one else other than previously declared coming out ?  The more the merrier;
73 Martyn (G3UKV/P on this occasion - rest of TDARS group gone AWOL)

On 13/07/2013 23:10, G3XDY wrote:
 

I won't be putting together a formal activity list for this event, as I
etc etc



Live webcast from AMSAT-UK Space Colloquium

M5AKA
 

Live web streaming this weekend from AMSAT-UK International Space Colloquium.

Already covered 2.4 GHz ISS DATV transmitter and 2.4 GHz to 10 GHz linear transponder for Geostationary orbit.

Presentations continue until 3pm Sunday. To watch this weekends presentations live see

http://amsat-uk.org/2013/07/18/webcast-of-international-space-colloquium/

Trevor M5AKA
http://amsat-uk.org/


Re: 24GHz, 47GHz, and 76-248GHz Contests next weekend, 21st July

Martyn G3UKV
 

Missed a bit off last e-mail for last part of Sunday:-

-------- Original Message --------
Subject: Re: [ukmicrowaves] 24GHz, 47GHz, and 76-248GHz Contests next weekend, 21st July
Date: Sat, 20 Jul 2013 15:12:19 +0100
From: Martyn Vincent
To: ukmicrowaves@...


Hi Peter, Keith, Chris, Roger et al
Been studying potential paths re 24 GHz.
So....
Start at Brown Clee (IO82QL84), around 0930 (UTC). Path to JO01EP maybe ????(with lift!) + IO81LS, IO93FB, IO93AD likely
Rove to Little Wenlock area (IO82RQ60). Paths to IO81LS, IO93AD, IO93AF08 maybe. Middle of day.
Rove to Redhill or New Works (IO82TQ16, IO82SQ01). Paths to Alport, Cat & Fiddle and more.  Later in afternoon. (Say 15:00 ?)

Lots of room for new paths there, and lots of "....perhaps...". Any other suggestions ?
Trust the microwave group pick up the diesel fuel bill for participants ? (just to see who reads this...!)
Any one else other than previously declared coming out ?  The more the merrier;
73 Martyn (G3UKV/P on this occasion - rest of TDARS group gone AWOL)

On 17/07/2013 13:12, Peter Day wrote:
 


24GHz Sunday 21st July:

G3PHO/P: 24GHz only. 2watts to 60cm offset dish. Talkback:
144.175MHz ssb ...NO KST.

Roving around the Peak District: 10.00BST to
approx 11.30: Alport Height. IO93FB44
12:30BST-14:30: Merryton Low Triangle IO93AD
15:00BST - ? : Possibly Cat & Fiddle near Buxton or other
location on demand.

It would be great if some of the southern stations
travelled to a location suitable for working us northerners ... say
within 160km or so of
Alport and Merryton ... locations like Malvern
Hills, Cotswolds, Chilterns, Coombe Gibbett, Therfield, etc.

Years ago there were several of you who had a
sense of adventure and tried to do new paths etc on these bands. Today
they seem happy to reinvent the wheel and work the
same old tried and tested ones month after month ... boring! :-)

... and don't tell me you're all too old to make
the trip ... I'm older than all of you!

73

Peter G3PHO

"Have rig... will travel"





Re: OFCOM - DRAFT RESPONSE FOR COMMENT

Martyn G3UKV
 

GA Murray
The RSGB Draft Response is EXCELLENT.

Without detracting from those who have already given guidance and offered their own suggestions in various places (forums, BATC, Finningley etc), it is the most comprehensive response I have read yet, and pulls no punches.
Well done to all concerned. Made my RSGB subscription all the more worthwhile !
73 Martyn G3UKV

On 19/07/2013 14:42, g6jyb wrote:
 


Thanks for all inputs so far

THE RSGB DRAFT REPOSNSE IS NOW ONLINE

Web page:
http://rsgb.org/main/operating/band-plans/microwaves/spectrum-release/

Short Link:
http://rsgb.org/main/files/2013/07/draft-response-v2.pdf

This may be used for your own ideas as well as for comments back to me on substance and typos

Please note there are items in this draft that so far may have been missed in other considerations inc on:-

a) the answer to Q1,
b) impact on European amateurs, if the bands are lost
c) the 2300-2310 option offer
d) a wider range of other measures that would complement the technical support offer that I am glad UKuG and BATC are up for

As with other efforts I would be glad of formal endorsements by UKuG, BATC and Amsat-UK who have contributed to various aspects

regards

Murray

Based on feedback we will update it add boilerplate etc prior to teh 5pm Monday deadline

--- In ukmicrowaves@..., "Michael Scott" wrote:
>
> Hi Murray and others.
>
> Folowing the useful discussion session at Finningley, I have just submitted my response online.
>
> 73, Mike, G3LYP
> ----- Original Message -----
> From: g6jyb
> To: ukmicrowaves@...
> Sent: Thursday, July 18, 2013 11:35 AM
> Subject: [ukmicrowaves] Re: Ofcom deadline approaching (next Monday July 22nd)
>
>
>
>
> For those who dont like the online form, a MS-Word Template is on the UKuG home page if you look at the latest update there
>
> Murray
>
> --- In ukmicrowaves@..., "g8gtz" wrote:
> >
> > All,
> >
> > Just a reminder that the closing date for the Ofcom 2.3 Ghz consultation process is approaching.
> >
> > I believe that everyone, whether active on 2.3 Ghz or not should respond, as we need to show Ofcom that we value the spectrum we have access to.
> >
> > If they do not see a large response, they will be more inclined when considering the future of other bands, such as 10 GHz, to take the approach of the authorities in Sweden and Australia and just remove our access to bands without consultation.
> >
> > In order to encourage responses from the ATV community, who are particularly affected by the proposed changes, I have posted my own proposed responses on the BATC forum at http://www.batc.org.uk/forum/viewtopic.php?f=2&t=3176&start=10
> >
> > Chris GW4DGU has also published his responses in the latest issue of Scatterpoint.
> >
> > Thanks to the good work by Murray and others we do have a good relationship with our regulator in the UK and this is the opportunity for us all to show them how much we value the spectrum we have access to.
> >
> > 73
> >
> > Noel - G8GTZ
> >
>



Re: 24GHz, 47GHz, and 76-248GHz Contests next weekend, 21st July

Martyn G3UKV
 

Hi Peter, Keith, Chris, Roger et al
Been studying potential paths re 24 GHz.
So....
Start at Brown Clee (IO82QL84), around 0930 (UTC). Path to JO01EP maybe ????(with lift!) + IO81LS, IO93FB, IO93AD likely
Rove to Little Wenlock area (IO82RQ60). Paths to IO81LS, IO93AD, IO93AF08 maybe. Middle of day.
Rove to Redhill or New Works (IO82TQ16, IO82SQ01). Later in afternoon.

Lots of room for new paths there, and lots of "....perhaps...". Any other suggestions ?
Trust the microwave group pick up the diesel fuel bill for participants ? (just to see who reads this...!)
Any one else other than previously declared coming out ?  The more the merrier;
73 Martyn (G3UKV/P on this occasion - rest of TDARS group gone AWOL)

On 17/07/2013 13:12, Peter Day wrote:
 


24GHz Sunday 21st July:

G3PHO/P: 24GHz only. 2watts to 60cm offset dish. Talkback:
144.175MHz ssb ...NO KST.

Roving around the Peak District: 10.00BST to
approx 11.30: Alport Height. IO93FB44
12:30BST-14:30: Merryton Low Triangle IO93AD
15:00BST - ? : Possibly Cat & Fiddle near Buxton or other
location on demand.

It would be great if some of the southern stations
travelled to a location suitable for working us northerners ... say
within 160km or so of
Alport and Merryton ... locations like Malvern
Hills, Cotswolds, Chilterns, Coombe Gibbett, Therfield, etc.

Years ago there were several of you who had a
sense of adventure and tried to do new paths etc on these bands. Today
they seem happy to reinvent the wheel and work the
same old tried and tested ones month after month ... boring! :-)

... and don't tell me you're all too old to make
the trip ... I'm older than all of you!

73

Peter G3PHO

"Have rig... will travel"