Date   

GB3CAM 24GHz beacon

g4bao
 

Bad news I'm afraid, I think the 24GHz beacon has failed, neither Roger G4BEL or Charlie G3WDG can hear it and they usually can. I've no 24GHz gear at the moment. I'll arrange to get up there at some point i the next week or so and get it back here to look at. At the same time, I'll fit the reverse DDS and the GPS reference, but it may be off the air for a while.

Sorry folks

73
John

--
G4BAO
QRV 1296 MHz,3400 MHz and 10368 MHz
Beacon keeper GB3CAM/24GHz
www.g4bao.com


Re: RSGB UHF UKAC Results

gm4cxm <gm4cxm@...>
 

--- In ukmicrowaves@yahoogroups.com, Richard Cooper G4WFR <vhf@...> wrote:

Hi all,
Just to let you know that I have now uploaded the latest UHF UKAC
results to include the March session.
Great support, 32 logs received on 23cm - Many thanks & keep up the good work.
http://www.rsgbcc.org/vhf/results/10/uhfukac.html

Thanks for the prompt adjudication Richard.


32 logs is a fantastic turnaround in activity on 23cm and even 13cm was up on Jan/Feb entries. Congratulations to Ian G8IFT at G8OHM for winning this months open section with a qso tally working out at around 1 contact every 3 minutes. A similar story in the restricted section with Tony GW8ASD netting 36 contacts and where there is some equally stiff competition.

Pleasing to see a few new faces and in particular some older hands returning to the band(s) and also the high number of stations running around 10w or less. A few make it into my log despite the 500Km distance but hardly any of the 200 - 300Km ones manage it. Possibly this is because they don't beam this way or don't correlate schedules on 'KST?

Comparing the claimed and final scores, a number lost precious points or square multipliers which changed ultimate positions. I've been in the same boat myself more than once and it certainly keeps you on your toes when working weaker stations.

The next event on the low bands will be the UKuG Low Bands contest on April 11th. Unfortunately it clashes with the Norbreck Rally in Blackpool which is the closest "biggy" GM's can get to by car so I won't be on for that contest but should be available for the next UKAC on April 20th.

73 Ray GM4CXM


Re: N connector

Russ Stewart <g4pbp@...>
 

Liviu Babi wrote:
I am asking that just because I use only N connectors at 1.7 KW out for 144 MHz EME for last 3 years and a friend of mine told me I was lucky. Not any faults even in 24 hours EME contest in digital mode. Have very good swr 1:1 at 1,7 KW out.
YO4FNG
Liviu

------------------------------------------------------------------------
*From:* G3XDY <g3xdy@btinternet.com>
*To:* ukmicrowaves@yahoogroups.com
*Sent:* Sat, March 27, 2010 8:18:14 PM
*Subject:* Re: [ukmicrowaves] N connector


Hi Liviu
A good N type should be capable of handling 1kW so long as the VSWR is low and the plug and socket are in good condition. Be aware that recently manufactured cheap commercial N types may use polypropylene insulation instead of PTFE, and they will melt at high powers.
Worn N types may have poor female centre contact pressure, leading to local hot spots that can destroy the connector. Unused "Precision N" female connectors may be worth looking for - they usually have 6 or 8 gold plated splines on the female connector inner and should exhibit lower contact resistance.
73
John G3XDY

----- Original Message -----
*From:* Liviu Babi <mailto:electronicguest@yahoo.com>
*To:* ukmicrowaves@ yahoogroups. com
<mailto:ukmicrowaves@yahoogroups.com>
*Sent:* Saturday, March 27, 2010 3:25 PM
*Subject:* [ukmicrowaves] N connector

What power can handle a good N connector ?
Liviu
YO4FNG

Hi Livi, safer to use 7/16 connectors above 1KW. N-type don't make very good fuses Hi.
Have a chat with the SM and OZ guys, they may be able to help. Also when I am in SM/OZ in May, I will have a look for you.

Russ ... g4pbp


Re: on4kst

Brian Flynn GM8BJF
 

Hi Dave,

I did this for a vodafone GPRS card for s laptop some time ago.
here is the link

http://myweb.tiscali.co.uk/gm8bjf/GPRS.html

I suspect the basics are the same between networks.

Brian,
GM8BJF

--- In ukmicrowaves@yahoogroups.com, "Dave" <davecossar@...> wrote:



Hi,



I'm still trying to get my Nokia mobile phone to connect to the ON4KST site







I can get my laptop to recognise the usb connection and it shows upon the
network as connected to the computer.







So is there a dial up number I have to use or a user name or password?







I've been on to O2 my phone is set for the web so what's the procedure in
using the EA6VQ client server.



O2 have said that pay as you go do not have the facility for telenet client
server I need an upgrade to a monthly tarrif







Dave GM3WIL


Re: N connector

Liviu Babi <electronicguest@...>
 

I am asking that just because I use only N connectors at 1.7 KW out for 144 MHz EME for last 3 years and a friend of mine told me I was lucky. Not any faults even in 24 hours EME contest in digital mode. Have very good swr 1:1 at 1,7 KW out.
 
YO4FNG
Liviu


From: G3XDY
To: ukmicrowaves@...
Sent: Sat, March 27, 2010 8:18:14 PM
Subject: Re: [ukmicrowaves] N connector

 

Hi Liviu
 
A good N type should be capable of handling 1kW so long as the VSWR is low and the plug and socket are in good condition. Be aware that recently manufactured cheap commercial N types may use polypropylene insulation instead of PTFE, and they will melt at high powers.
 
Worn N types may have poor female centre contact pressure, leading to local hot spots that can destroy the connector. Unused "Precision N" female connectors may be worth looking for - they usually have 6 or 8 gold plated splines on the female connector inner and should exhibit lower contact resistance.
 
73
 
John G3XDY
----- Original Message -----
From: Liviu Babi
Sent: Saturday, March 27, 2010 3:25 PM
Subject: [ukmicrowaves] N connector

What power can handle a good N connector ?
 
Liviu
YO4FNG 



Re: N connector

John Quarmby
 

Hi Liviu
 
A good N type should be capable of handling 1kW so long as the VSWR is low and the plug and socket are in good condition. Be aware that recently manufactured cheap commercial N types may use polypropylene insulation instead of PTFE, and they will melt at high powers.
 
Worn N types may have poor female centre contact pressure, leading to local hot spots that can destroy the connector. Unused "Precision N" female connectors may be worth looking for - they usually have 6 or 8 gold plated splines on the female connector inner and should exhibit lower contact resistance.
 
73
 
John G3XDY

----- Original Message -----
From: Liviu Babi
Sent: Saturday, March 27, 2010 3:25 PM
Subject: [ukmicrowaves] N connector

What power can handle a good N connector ?
 
Liviu
YO4FNG 


Wanted - ATF10135's

Doug G4DZU
 

Hi,

Does anyone have a couple of ATF10135's gathering dust on their shelf that they would like to part with.

Thanks
Doug
G4DZU


Farnham 5.7Ghz beacon

Ralph
 

Sorry Brian and John,
 
I have had my receiver running on the frequency all afternoon since receiving notification
and nothing received. Conditions a little poor to the east as Bellhill 5.7GHz is not very strong
today. Will spot it as soon as it is detected here
 
73
Ralph


N connector

Liviu Babi <electronicguest@...>
 

What power can handle a good N connector ?
 
Liviu
YO4FNG 


Re: Farnham Beacon RDDS upgrade

Graham - G4FSG
 

Brian

 

Many thanks – I switched on the 5.7GHz system, left it for 30 minutes, tuned to what I thought was 5760.920 and there it was at 519 at 175km. It is the only non MHx beacon that I can reliably hear on 5.7 or 10G under normal conditions with my poor home take off.

 

I can now set my 5.7G frequency!!

 

I have spotted it and updated beaconspot.eu

 

Thanks again, particularly to you and John!

 

73

 

Graham

Hello Folks

I am pleased to report that following the RDDS upgrades the Farnham beacons are back on the air and on Frequency. We checked the 47GHz beacon on site and that's on frequency too. The 5.7GHz and 24GHz beacons with the RDDS modifications have now been received by John G8ACE and myself from our home QTHs.

Reports on beaconspot would be welcome.

73 Brian G4NNS.


RSGB UHF UKAC Results

Richard Cooper G4WFR <vhf@...>
 

Hi all,
Just to let you know that I have now uploaded the latest UHF UKAC results to include the March session.
Great support, 32 logs received on 23cm - Many thanks & keep up the good work.
http://www.rsgbcc.org/vhf/results/10/uhfukac.html


73,
Richard G4WFR


Farnham Beacon RDDS upgrade

Brian <brian-coleman@...>
 

Hello Folks

I am pleased to report that following the RDDS upgrades the Farnham beacons are back on the air and on Frequency. We checked the 47GHz beacon on site and that's on frequency too. The 5.7GHz and 24GHz beacons with the RDDS modifications have now been received by John G8ACE and myself from our home QTHs.

Reports on beaconspot would be welcome.

73 Brian G4NNS


Re: on4kst

Ed <ed.murphy31@...>
 

USERNAME : faster

PASSWORD : password

You will also require the command string. Unfortunately I am not at base computer at this moment to advise . On Sunday evening I could have info.

Cheers
Ed Murphy
GM3SBC
ps Is it true that you are about to come on 3 cms ?

--- In ukmicrowaves@yahoogroups.com, "Dave" <davecossar@...> wrote:



Hi,



I'm still trying to get my Nokia mobile phone to connect to the ON4KST site







I can get my laptop to recognise the usb connection and it shows upon the
network as connected to the computer.







So is there a dial up number I have to use or a user name or password?







I've been on to O2 my phone is set for the web so what's the procedure in
using the EA6VQ client server.



O2 have said that pay as you go do not have the facility for telenet client
server I need an upgrade to a monthly tarrif







Dave GM3WIL


on4kst

Dave <davecossar@...>
 

 

Hi,

 

I'm still trying to get my Nokia mobile phone to connect to the ON4KST site

 

 

 

 I can get my laptop to recognise the usb connection and it shows upon the network as connected to the computer.

 

 

 

So is there a dial up number I have to use or a user name or password?

 

 

 

I've been on to O2 my phone is set for the web so what's the procedure in using the EA6VQ client server.

 

O2 have said that pay as you go do not have the facility for telenet client server  I need an upgrade to a monthly tarrif

 

 

 

Dave GM3WIL

 


Re: Items for sale

SAM JEWELL
 

Sorry Geert,
It went very quickly.
73 de Sam





On 25 Mar 2010, at 11:12, Gerard Geesink <pa0batster@...> wrote:

Hi Sam,
 
Is the Narda directional coupler for 2 - 4 GHz still available?
I'm interested to buy it.
 
73 Gerard PA0BAT

 
2010/3/23, SAM JEWELL <jewell@...>:
 

Folks,
Please excuse my use of bandwidth for this sales pitch, but I don't want to put these items on EBAY and they have already been offered on our local Codgers group reflector, where some DB6NT transverters and other items have already gone.
******************************************************************************************************************************************************************************************************
The following items were 'rescued' yesterday from the estate of the late G4BYV.
I thought that these might be of some interest to UK Microwavers but the low prices might cause them to go overseas rather than remain in the UK to help the 'cause'!

Narda Directional coupler 3003-20, 2 - 4GHz. -20dB coupling. N connectors. This is the older version with the straight N connectors. Believed working well. It is capable of carrying to 500W output on 2.3GHz as per my column in Radcom.
15GBP plus 3GBP postage and packaging.

Narda Directional coupler 3045B-20, 7-11GHz. -20dB coupling. N connectors. Again, the older version with straight N connectors. Believed working well. Same power handling as the 2 - 4GHz one.
15GBP plus 3GBP P&P

A real gem....Bird 100J slug. 100W 0.95 to 1.26GHz (yes, a real 23cm slug!). Looks like new. I have no idea where John obtained it. It could have been bought new by him.
50GBP plus 2.5GBP P&P. Now you can check out that G4BAO amplifier as well as the match on your antenna, as long as you already have a Bird 43 or similar!!
I don't expect this item to remain long, at this price..............................!

Just on the off chance. I picked up an old SSB Electronics 432>28MHz transverter with switchable LO for 432MHz and one other (The crystal appears to say 101.5MHz, but not certain). It is a low power unit, but uncertain of power output or sensitivity. It is offered for the princely sum of 10GBP plus 3.0GBP P&P. It's probably worth it for the two crystals given their cost these days! It's in a weathered tin plate box with feedthroughs. It looks as if John may have made it up from a kit.

Please respond off list if you are interested in any of these items from John's estate. I've already paid his relatives for these items at the prices quoted above. There is no profiteering on these sales. I preferred to see them go to a good home that is not the local tip!

I can accept PAYPAL or cheque.

73 de Sam, G4DDK

Respond to sam (at) g4ddk (dot) com



Re: Items for sale

Gerard Geesink <pa0batster@...>
 

Hi Sam,
 
Is the Narda directional coupler for 2 - 4 GHz still available?
I'm interested to buy it.
 
73 Gerard PA0BAT

 
2010/3/23, SAM JEWELL <jewell@...>:

 

Folks,
Please excuse my use of bandwidth for this sales pitch, but I don't want to put these items on EBAY and they have already been offered on our local Codgers group reflector, where some DB6NT transverters and other items have already gone.
******************************************************************************************************************************************************************************************************
The following items were 'rescued' yesterday from the estate of the late G4BYV.
I thought that these might be of some interest to UK Microwavers but the low prices might cause them to go overseas rather than remain in the UK to help the 'cause'!

Narda Directional coupler 3003-20, 2 - 4GHz. -20dB coupling. N connectors. This is the older version with the straight N connectors. Believed working well. It is capable of carrying to 500W output on 2.3GHz as per my column in Radcom.
15GBP plus 3GBP postage and packaging.

Narda Directional coupler 3045B-20, 7-11GHz. -20dB coupling. N connectors. Again, the older version with straight N connectors. Believed working well. Same power handling as the 2 - 4GHz one.
15GBP plus 3GBP P&P

A real gem....Bird 100J slug. 100W 0.95 to 1.26GHz (yes, a real 23cm slug!). Looks like new. I have no idea where John obtained it. It could have been bought new by him.
50GBP plus 2.5GBP P&P. Now you can check out that G4BAO amplifier as well as the match on your antenna, as long as you already have a Bird 43 or similar!!
I don't expect this item to remain long, at this price..............................!

Just on the off chance. I picked up an old SSB Electronics 432>28MHz transverter with switchable LO for 432MHz and one other (The crystal appears to say 101.5MHz, but not certain). It is a low power unit, but uncertain of power output or sensitivity. It is offered for the princely sum of 10GBP plus 3.0GBP P&P. It's probably worth it for the two crystals given their cost these days! It's in a weathered tin plate box with feedthroughs. It looks as if John may have made it up from a kit.

Please respond off list if you are interested in any of these items from John's estate. I've already paid his relatives for these items at the prices quoted above. There is no profiteering on these sales. I preferred to see them go to a good home that is not the local tip!

I can accept PAYPAL or cheque.

73 de Sam, G4DDK

Respond to sam (at) g4ddk (dot) com



Re: Birkett Black Spot Fets

Mark - M1MPW
 

I'd just like to thank the anonymous donor of what appear to be four brand new black spot fets that appeared in my post today.

I promise to take extra care checking that a negative bias voltage is available before fitting them.

73

Mark
M1MPW


Items for sale

SAM JEWELL
 

Folks,
Please excuse my use of bandwidth for this sales pitch, but I don't want to put these items on EBAY and they have already been offered on our local Codgers group reflector, where some DB6NT transverters and other items have already gone.
******************************************************************************************************************************************************************************************************
The following items were 'rescued' yesterday from the estate of the late G4BYV.
I thought that these might be of some interest to UK Microwavers but the low prices might cause them to go overseas rather than remain in the UK to help the 'cause'!

Narda Directional coupler 3003-20, 2 - 4GHz. -20dB coupling. N connectors. This is the older version with the straight N connectors. Believed working well. It is capable of carrying to 500W output on 2.3GHz as per my column in Radcom.
15GBP plus 3GBP postage and packaging.

Narda Directional coupler 3045B-20, 7-11GHz. -20dB coupling. N connectors. Again, the older version with straight N connectors. Believed working well. Same power handling as the 2 - 4GHz one.
15GBP plus 3GBP P&P

A real gem....Bird 100J slug. 100W 0.95 to 1.26GHz (yes, a real 23cm slug!). Looks like new. I have no idea where John obtained it. It could have been bought new by him.
50GBP plus 2.5GBP P&P. Now you can check out that G4BAO amplifier as well as the match on your antenna, as long as you already have a Bird 43 or similar!!
I don't expect this item to remain long, at this price..............................!

Just on the off chance. I picked up an old SSB Electronics 432>28MHz transverter with switchable LO for 432MHz and one other (The crystal appears to say 101.5MHz, but not certain). It is a low power unit, but uncertain of power output or sensitivity. It is offered for the princely sum of 10GBP plus 3.0GBP P&P. It's probably worth it for the two crystals given their cost these days! It's in a weathered tin plate box with feedthroughs. It looks as if John may have made it up from a kit.


Please respond off list if you are interested in any of these items from John's estate. I've already paid his relatives for these items at the prices quoted above. There is no profiteering on these sales. I preferred to see them go to a good home that is not the local tip!

I can accept PAYPAL or cheque.

73 de Sam, G4DDK


Respond to sam (at) g4ddk (dot) com


RE PE3341 Synth Chip

F6DRO
 

Hello ,

if I recall rigth , this chip is used in the " high Sierra" company 144/28
and 432/28 converters using 10Mhz lock.

73
Dom


Re: Homebrew Yagi's

Robert Price <g8dtf@...>
 

Hi Steve
 
Thanks for the information. It's nice to know that someone has had some success with a design before you start. I am going to end up with a single Yagi though. Going for multiple yagi's in an array is not going to be feasible at the moment on my portable mast. I am not sure it could handle the weight or windage. I may go for an array at some point later, when I have sorted out my 12m pump up mast.
 
I have a drill press, so drilling the holes should not be too much of a problem, although I am contemplating making up a jig for element insertion so that i can get that part of it accurate.
 
The picture of the yagi's looks excelent, I wonder what you have managed to work on 23cm from there. It is a long while since I had a serious 23cm station - in the 1980's I used to run 100W to a 6 foot wire mesh dish, until the wind brought it down. I think the ODX then was into Austria at about 1300Km.
 
I may be able to get to see those yagi's in person next year. My wife and I are planning a trip to New Zealand some time in 2011. It is still in the planning phase at the moment, but we are planning about 2 weeks touring in NZ and a week in the Cook islands.  I have not made any decisions on whether to bring some radio with me yet, with a longish trip like this, weight will be at a premium. I did manage to take 3cm with me to Ireland for the holiday (on the ferry) last year, but the equipment is really heavy.
 
I will have to look and see if there is a way I can produce a really lightweight arrangement.
 
regards
 
Bob
G8DTF


From: Julie & Stephen
To: ukmicrowaves@...
Sent: Mon, 22 March, 2010 3:37:52
Subject: Re: [ukmicrowaves] Homebrew Yagi's

 

Hi Bob,
 
My 23 cm Yagi is from the VK5DJ calculator and recommended. I used 6 mm dia rods for the elements into 12 mm round booms.
 
I built 4 of them - that is each Yagi is 30 elements and stacked them in a bay of 4 to make 120 elements in total. It preforms well and is sharp out front. 
 
Now it is so easy to drill round booms and keep every element straight.. You place the drill press on the garage floor (it will be moved around) - you then mount the long boom at each end with drill press clamps and place also on the concrete floor - pre drill little holes by hand with a chordless drill - then to drill the many 6 mm holes, you simply move the drill press along the boom as it will slide on the flat of the concrete floor. In other words you long boom stays fixed and clamped at each end.
 
Now here is my recommendation for a portable Yagi. Rather than just build a long one, say 6 metre long - build and stack two of them, one above the other this is. But get up to around the 80 element mark and I would say you would have a good performer.
 
Hope that is of some help.. attached is a small picture of my home station 23 cm VK5DJ design...
 
 
Steve ZL1TPH
0274 732663
 


--- On Mon, 22/3/10, Robert Price wrote:

From: Robert Price
Subject: [ukmicrowaves] Homebrew Yagi's
To: ukmicrowaves@ yahoogroups. com
Date: Monday, 22 March, 2010, 12:46 AM

 
Since having a go at the recent UKAC 129MHz contest and looking at the submitted entries I am certain I need to improve my antenna for 23cm. Currently I put up a portable mast in the back garden with a 19ele Sandpiper yagi on it. It does work, but I suspect that the gain is not great.

So to remedy the situation I have assembled a stock of suitable alluminium tube (15mm x 15mm square) and rod (3.2 mm and 3.9mm) - all I have to do now is decide what to build.

I have been looking closely at 3 designs.

1) DL6WU original design for the 3m (37ele), 4m (49ele) or 6m (70ele)
2) DJ9YW derivative of the DL6WU for the 4m (47 ele) or (5m 59 ele)
3) VK5DJ derivative using the yagi calculator

I want to ask if anyone has had any experience of building either of the latter two options.

From the point of view of practicality the design will have to be capabel of being collapsed down into 1.5 m sections for storage and cannot be so heavy it cannot be used for portable operation. My own thoughts here would be to limit the maximum length to about 4.5m.

I have not tried to measure the gain of the current 19 ele, but I intend to keep it for comparative gain measurements just to see what improvement I can make.

Bob G8DTF