Date   
Re: 2.4 GHz used for 'twisted' wave demonstration

Barry Chambers
 

Morning All

Is it just a demo of RH and LH circular polarisation?

Barry, G8AGN

On 02/03/2012 11:22, Trevor . wrote:
An interesting way to increase data capacity on the microwave bands, see

http://www.southgatearc.org/news/march2012/twisted_waves.htm

73 Trevor M5AKA

Re: LMX2470 FracnN Synth PCBs

David Wrigley <zen130696@...>
 

Hi Andy

I got the pcb - nice job and very quickly delivered.

I've just been checking through the BOM on page 5 of your article dated Feb 2012. There appears to be two errors

1. of the six 100-220p caps on the bottom row of the main table C12 is a duplication and should be deleted.
2. on the very last row change R25 to R24 as the Loop Filter Third Pole

I hope that's right?

I'm intending to lock a 2.5GHz cavity oscillator using this pcb - I'll let you know how I get on.

73 David G6GXK

2.4 GHz used for 'twisted' wave demonstration

M5AKA
 

An interesting way to increase data capacity on the microwave bands, see

http://www.southgatearc.org/news/march2012/twisted_waves.htm

73 Trevor M5AKA

Re: UK Microwave Group Low Band Contest 4th March - Activity List

Ralph
 

Hello John,
 
I have a much reduced capability for this contest at present
due to mast damage. Will only be able to do the 9cm band.
 
Callsign:   G4ALY
Location:  IO70VL
Band:        3.4GHz 30W 75cm dish
 
Talk-back:70cm 2x19el 120w  .200 and KST
Still QRT 2m 23/13cm.
 
73 Ralph
 
 

----- Original Message -----
From: G3XDY
Sent: Saturday, February 25, 2012 11:59 PM
Subject: [ukmicrowaves] UK Microwave Group Low Band Contest 4th March - Activity List

 

The first of this year's UK Microwave Group contests takes place next
Sunday the 4th March from 10:00 - 16:00 on the 1.3, 2.3 and 3.4GHz bands.

Full rules can be found on the UK Microwave Group website at:
http://www.microwavers.org/files/2012-mwrules.pdf

As usual I will compile an activity list and copy it to the reflector
next Saturday. Please send me your operating plans preferably formatted
as per the example below - it makes compiling the list a lot easier.

I plan to be active as follows:

Callsign: G3XDY
Locator: JO02OB
Bands: 1.3GHz 400W 4x23ele
2.3GHz 100W 80cm dish
3.4GHz 20W 60cm dish
Talkback: Calling/listening direct on 1.3GHz, also via ON4KST and 432MHz
Times: Various throughout the contest.

73 John G3XDY
UK Microwave Group Contest Manager

Re: UK Microwave Group Low Band Contest 4th March - Activity List

Pete - GM4BYF
 

I intend to be active in this event from my home QTH
Hopefully 23cm & 13cm dependent on getting the antennas sorted.
Callsign GM4BYF
Locator IO85JV
Talkback - KST, 144 MHz 432 MHz
 
73
 
Pete

For GW3TKH

Christopher Bartram <cbartram@...>
 

Hello Keith

After our conversation re KST/P on Monday evening, I've located the cable I mentioned. BUT I don't have your mailing address. If you send me it to me offline, I'll put it the cable in a jiffy bag and post it ...

Good to see you, and a lot of other friends, some of whom might be reading this(!) at Bristol.

Vy 73

Chris
GW4DGU

Re: Old but is it useful? Jaybeam 15 over 15 slot fed 23cm aerial

 

I have put the data sheet for this antenna in the "Files" section.
It states that the directors are 9.5cm long if you want to compare that with your measurements.
Yes it is rugged; mine is still intact and working after 35 years, a considerable part of that being outside.
Ken G3YKI

--- In ukmicrowaves@..., "ferrymanr" <g4bbh@...> wrote:

I measured up this yagi and fed the details into MMANA-GAL to run a simulation. Predicted gain is mediocre (15dBi) but with the measured dimensions the gain peaks at over 1400MHz. Initial tests bear this out in practice. I suspect the aerial I have is cut for the ATV repeater output frequencies, or may have been modified by shortening elements at some time.
Dick G4BBH

Re: QRV on 23cms and other bands

G4WIM KT6UK
 

Hi Ian

Yes much catching up to do (nearly 40 years worth !)

Better get the dust blown off the 23cm gear and point it my way.

I can hear a few distant 23cm beacons GB3EDN comes in quite well as does GB3CLE - so I'm not totally in an RF black hole.

I am on ON4KST now and looking out for contacts on 23cms - made my 1st contact last night to Warrington, all of about 30 miles !

Best wishes to all

73 Tim G8GIW / G4WIM / KT6UK

PS Pete G3UCA is still very active round here.

--- In ukmicrowaves@..., Ian White GM3SEK <gm3sek@...> wrote:

Tim Forrester wrote:


Hi Guys

I'm active now QRV on 144 /432 and 1296MHz SSB

I'm located at IO83LR - basically at sea level right on the coast with
modest power / antennas, but have a good take off 360 degrees.

Running 100 watts on all three bands 144 / 432 and 1296 to a 4, 11
and 16 element  yagi respectively.  23 cms has a mast head pre-amp /
PA.

If you hear me - give me a call !

13 cms is at the planning stage.
73 Tim
G4WIM / KT6UK
Welcome back, Tim!

Much catching up to do, so I'd better get the 23cm going again :-)


--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek

Re: UK Microwave Group Low Band Contest 4th March - Activity List

mike.willis@...
 

I will try and come on - I have 13cms 25W and 23cms 50W. 9cms 15W. possibly but only for local contacts as it is connected to the dish via 30m of LMR400 as I don't yet have a front end protection filter. Dish in all cases is 1.2m. No talkback except KST, I have not got any VHF antennas up.

Mike



________________________________
From: G3XDY <g3xdy@...>
To: "ukmicrowaves@..." <ukmicrowaves@...>
Sent: Saturday, 25 February 2012, 23:59
Subject: [ukmicrowaves] UK Microwave Group Low Band Contest 4th March - Activity List


 
The first of this year's UK Microwave Group contests takes place next
Sunday the 4th March from 10:00 - 16:00 on the 1.3, 2.3 and 3.4GHz bands.

Full rules can be found on the UK Microwave Group website at:
http://www.microwavers.org/files/2012-mwrules.pdf

As usual I will compile an activity list and copy it to the reflector
next Saturday. Please send me your operating plans preferably formatted
as per the example below - it makes compiling the list a lot easier.

I plan to be active as follows:

Callsign: G3XDY
Locator: JO02OB
Bands: 1.3GHz 400W 4x23ele
2.3GHz 100W 80cm dish
3.4GHz 20W 60cm dish
Talkback: Calling/listening direct on 1.3GHz, also via ON4KST and 432MHz
Times: Various throughout the contest.

73 John G3XDY
UK Microwave Group Contest Manager

Re: Contact info for LX1DU

Roger Ray
 

Many thanks to John and others I have it now.

Roger

--- In ukmicrowaves@..., "John" <pa7jb@...> wrote:

lx1ducron@...


GL John PA7JB




----- Original Message -----
From: Roger
To: ukmicrowaves@...
Sent: Wednesday, February 29, 2012 2:52 PM
Subject: [ukmicrowaves] Contact info for LX1DU



Does anyone have a contact email for Franc LX1DU?
If so could you email me directly.
Thanks....

Re: Contact info for LX1DU

John Lambo
 

 
 
GL  John  PA7JB
 
 
 
 

----- Original Message -----
From: Roger
Sent: Wednesday, February 29, 2012 2:52 PM
Subject: [ukmicrowaves] Contact info for LX1DU

 

Does anyone have a contact email for Franc LX1DU?
If so could you email me directly.
Thanks....

Re: Contact info for LX1DU

John Lambo
 

Hello Roger.
 
GL  John  Pa7JB
 
 

----- Original Message -----
From: Roger
Sent: Wednesday, February 29, 2012 2:52 PM
Subject: [ukmicrowaves] Contact info for LX1DU

 

Does anyone have a contact email for Franc LX1DU?
If so could you email me directly.
Thanks....

Re: UK Microwave Group Low Band Contest 4th March - Activity List

Robert Price <g8dtf@...>
 

Hi John

I plan to be active as follows:

Callsign: G8DTF
Locator: IO83SM
Bands:
2.3GHz 18W 62 ele
3.4GHz 5W 80cm dish
Talkback: Calling/listening direct 2.3GHz or ON4KST
Times: Various throughout the contest.

73

Bob
G8DTF


From: G3XDY
To: "ukmicrowaves@..."
Sent: Saturday, 25 February 2012, 23:59
Subject: [ukmicrowaves] UK Microwave Group Low Band Contest 4th March - Activity List

 
The first of this year's UK Microwave Group contests takes place next
Sunday the 4th March from 10:00 - 16:00 on the 1.3, 2.3 and 3.4GHz bands.

Full rules can be found on the UK Microwave Group website at:
http://www.microwavers.org/files/2012-mwrules.pdf

As usual I will compile an activity list and copy it to the reflector
next Saturday. Please send me your operating plans preferably formatted
as per the example below - it makes compiling the list a lot easier.

I plan to be active as follows:

Callsign: G3XDY
Locator: JO02OB
Bands: 1.3GHz 400W 4x23ele
2.3GHz 100W 80cm dish
3.4GHz 20W 60cm dish
Talkback: Calling/listening direct on 1.3GHz, also via ON4KST and 432MHz
Times: Various throughout the contest.

73 John G3XDY
UK Microwave Group Contest Manager


Contact info for LX1DU

Roger Ray
 

Does anyone have a contact email for Franc LX1DU?
If so could you email me directly.
Thanks....

Re: Old but is it useful? Jaybeam 15 over 15 slot fed 23cm aerial

Richard Ferryman
 

OOps! I should have said gain peaks at over 1340MHz not over 1400MHz.
Dick G4BBH

--- In ukmicrowaves@..., "ferrymanr" <g4bbh@...> wrote:
simulation. Predicted gain is mediocre (15dBi) but with the measured dimensions the gain peaks at over 1400MHz. Initial tests bear this out .

Re: LMX2470 FracnN Synth PCBs

Andy G4JNT
 

PCBs have arrived
 
Andy
G4JNT



On 31 January 2012 17:13, Mark GM4ISM <gm4ism@...> wrote:
 

Also interest up here Andy
 Especially if provision can be made for simple frequency change on wire select (eg for split freq operation on 2.3GHz EME to be triggered by the PTT when set up correctly).
a header or pads to allow rapid swapping of registers...
 
regards
Mark GM4ISM
 
 

Sent: Tuesday, January 31, 2012 9:22 AM
Subject: [ukmicrowaves] LMX2470 FracnN Synth PCBs

 

OK...
Enough responses to make a PCB order worthwhile.

It will be a week or so before I can do a manufacturable version of
the PCB - there are fundamental differences between a layout suitable
for home brewing and one for production (not least the neeed to
actually define a ground plane in the software!) and my first
breadboard didn't have the PIC on the board. Then a further
manufacture time, so look for a month or so yet...

But first of all, the deadline for April's RadCom columns is
approaching, so must do that first before looking at PCBs.

(ps.)
Incidently, I lied in the original email. The chip has 24 pads, not
18 as stated; 9 each side and three top and bottom. But you saw that
after downloading the data sheet didn't you :-)
But - not having one large pad on the underside, its still quite easy
to solder.
I do appear to have got a LMX2487 going, but had to reflow a couple of
joints after soldering the homebrew large plated through hole on the
underside which disturbed some of the already soldered pads.
Wouldn't recommend using that technique on homebrew PCBs with exotic
expensive chips.

Andy
www.g4jnt.com


Re: Old but is it useful? Jaybeam 15 over 15 slot fed 23cm aerial

Richard Ferryman
 

I measured up this yagi and fed the details into MMANA-GAL to run a simulation. Predicted gain is mediocre (15dBi) but with the measured dimensions the gain peaks at over 1400MHz. Initial tests bear this out in practice. I suspect the aerial I have is cut for the ATV repeater output frequencies, or may have been modified by shortening elements at some time.
Dick G4BBH

Re: QRV on 23cms and other bands

geoffrey pike
 

Hope to here you on 432 and 1296 MHz and 3cm if you get that far.
I wonder if you use for 144 MHz a certain radio that appeared on page 35 of Wireless World in November 1982?
regards
Geoff


From: Tim Forrester
To: ukmicrowaves@...
Sent: Tuesday, 28 February 2012, 17:50
Subject: [ukmicrowaves] QRV on 23cms and other bands

 
Hi Guys

I'm active now QRV on 144 /432 and 1296MHz SSB

I'm located at IO83LR - basically at sea level right on the coast with modest power / antennas, but have a good take off 360 degrees.

Running 100 watts on all three bands 144 / 432 and 1296 to a 4, 11 and 16 element  yagi respectively.  23 cms has a mast head pre-amp / PA.

If you hear me - give me a call !

13 cms is at the planning stage.

73 Tim

G4WIM / KT6UK


Re: February RSGB SHF UK Activity Contest - Reminder

mike.willis@...
 

I intend to be on on 13cms having installed the 1.2m dish at a greater height. I can now at least hear GB3MHS pretty much all the time. I would like to try 9cms but I need to obtain a pre-amp protection filter first - or at least instigate some PTT protection.

Mike

--- In ukmicrowaves@..., "gm4cxm" <gm4cxm@...> wrote:

Hi all,

The February session of the RSGB SHF UKAC takes place tomorrow evening, Tuesday 28th between 8pm and 10.30pm on 13cm, 9cm, 6cm and 3cm.

I hope to be active on 13cm if it's dry and therefore able to mount the antenna on a short pole through the loft window.
The 67el has been removed from the tower which had a very long feeder run in preparation of mounting it on the gable end and a vastly shorter one.

There is just over a day left to submit an entry for last weeks 23cm UKAC and already a new record has been achieved with 55 entries and therefore the current number of 60 who have taken part in the UK Microwave Group's poll on supporting the continuation or not of the M5 multiplier in RSGB microwave UKAC's at http://uk.groups.yahoo.com/group/scatterpoint/polls is perhaps a fair indication.

73 Ray GM4CXM

Re: QRV on 23cms and other bands

Ian White
 

Tim Forrester wrote:


Hi Guys

I'm active now QRV on 144 /432 and 1296MHz SSB

I'm located at IO83LR - basically at sea level right on the coast with
modest power / antennas, but have a good take off 360 degrees.

Running 100 watts on all three bands 144 / 432 and 1296 to a 4, 11
and 16 element  yagi respectively.  23 cms has a mast head pre-amp /
PA.

If you hear me - give me a call !

13 cms is at the planning stage.
73 Tim
G4WIM / KT6UK
Welcome back, Tim!

Much catching up to do, so I'd better get the 23cm going again :-)


--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek