Date   
Test

m0afj <m0afj@...>
 

test

Re: More 10 GHz Activity

Richard <richard.bown@...>
 

On Fri, 2011-07-29 at 08:46 +0000, Dave wrote:



Does anyone know of an alternative to using a full web browser on a
mobile phone for Android please?

I'm still on the lookout for something similar to KST2me or EA6VQ
telnet clients, but not having to link the PC through the phone, that
will run directly on the mobile phone...

Anyone any ideas if this has been done?

I have now set up a twitter account as @g0dja, so anyone who uses
twitter is welcome to seach for that and 'follow' I'll also follow
back of course, but I'll also monitor for the hashtag #UKuG as well.

Thanks - Dave (G0DJA)
If the dxcluster is used there is nkkcluster, also try Opera mini web
broswer, its on android market and free.

HTH
.


--
Best wishes / 73
Richard Bown

E-mail: richard@...

nil carborundum a illegitemis
########################################################################
Sent by Evolution 2.32.1 on Fedora FC15 x86_64 Dual core AMD Athlon 4400
Ham Call:G8JVM
Maidenhead QRA: IO82SP38:LAT. 52 39.720':N LONG. 2 28.171 W (degs,mins )
QRV HF + VHF Microwave 23 cms:140W,13 cms:100W,6 cms:10W & 3 cms:5W
########################################################################

Re: Activity List for the UKuG 5.7/10/24GHz Cumulatives on 31 July 2011

Chris Bartram <cbartram@...>
 

Subject to the weather being reasonably dry, I plan to be QRV as follows:

Callsign: GW4DGU/P
Locator: IO71SW or possibly IO72PB
Band: 10GHz 8W, 80cm dish, 1dBNF
Talkback: ON4KST only

Re: More 10 GHz Activity

Dave <dave@...>
 


Does anyone know of an alternative to using a full web browser on a mobile phone for Android please?
 
I'm still on the lookout for something similar to KST2me or EA6VQ telnet clients, but not having to link the PC through the phone, that will run directly on the mobile phone...
 
Anyone any ideas if this has been done?
 
I have now set up a twitter account as @g0dja, so anyone who uses twitter is welcome to seach for that and 'follow' I'll also follow back of course, but I'll also monitor for the hashtag #UKuG as well.
 
Thanks - Dave (G0DJA)

Re: XO replacements

David Wrigley <zen130696@...>
 

Hi Grant,

The GeMMA PCB worked reasonably well, I think I gave you some PN figures from G4TWJ's setup. I'm a mainly digital man and not an RF specialist so I'm not sure how good these were, but please feel free to pass these on.

The short answer is no, the beacon is still not up but it is complete.

There were other problems besides freq generation with a two freq beacon which I have no doubt you would be aware. The main problem was that in spite of all the filtering the final PA was simply not linear enough to give a clean output without intermod products appearing. In order to minimise these I reduced the lower freq power output by 10dB and this had the effect of significantly reducing the intermod output. So that is how it's going to be until I learn a bit more about RF. Other than that the final assembly has been on a soak test and all temperatures are well down inspite of the overall consumption of over 100W. The cooling is by ducted fan. Eventually I will need to add an "over temp" or "fan stall" trip before the fan inevitably fails.

All equipment is in a single 2U rack tray with Andrew cable (-1.7dB) up to the antenna. The internal mounting should mean that I can make any changes fairly easily.


73 David G6GXK

On 28/07/2011 12:29, Grant Hodgson wrote:
David

What about the approach used by the uW SDR Tx board - i.e. use a phase locked
VCO in the 2.3-2.8GHz range and multiply from there - as used on the 5.6GHz LO
for the dual-frequency GB3MAN 5.7GHz beacon? Is that beacon on the air?

regards

Grant G8UBN

On Thu, 28 Jul 2011 09:12:53 +0100, David Wrigley wrote
Hi Chris et al,

Very interesting. I have been approching this from the cancept of
providing a very high quality GPS locked 10MHz OCXO and multiplying
this up to 1GHz to clock a DDS (AD9912), The output from this DDS
is really a major improvement on previous DDS but it is vitally
dependant on the clock and best not to use the internal multiplier.
This appears to give a reasonable quality output to at leaste 47GHz.
I would very much appreciate sight of your PN measuring system to
get some actual measurements made,

I have also been looking at a high Q UHF VCO. In fact I am using
one of the California Microwave "bricks" (locked cavity osc and
diode multiplier) to provide a LO for 10GHz transverter this seems
to be working cleanly and reliably. It would be interesting to
compare this with the DDS for PN.

73 David G6GXK



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

Yahoo! Groups Links



Re: More 10 GHz Activity

Robert Price <g8dtf@...>
 

Hi Gordon

I will be around at 1pm so I will keep an eye on KST.

73
Bob
G8DTF


From: gi6atz
To: ukmicrowaves@...
Sent: Thursday, 28 July 2011, 21:50
Subject: [ukmicrowaves] Re: More 10 GHz Activity

 
Hi All,
Thanks to all those who took time to look for me last night. I had successful contacts with G4PBP and G4CBW and heard G8DTF briefly.

Unfortunately nothing heard from either G4DDK or G4BAO.

I'm planning to go to the GB3NGI beacon site (IO65VB) tomorrow to change out the 2 mtr antennas and I will be taking the 10 GHz gear with me. Keep a look out on KST for me from about 13:00 local.

I'm also planning to be out for a short while on Sunday morning for the 10 GHz contest but I'll confirm that on Saturday.

Gordon
GI6ATZ

--- In ukmicrowaves@..., Robert Price >
> Hi Gordon
>
> I will be about this evening so I will watch KST.
>
> 73
>
>
> Bob
> G8DTF
>
>
>
> ________________________________
> From: gi6atz
> To: ukmicrowaves@...
> Sent: Tuesday, 26 July 2011, 20:40
> Subject: [ukmicrowaves] More 10 GHz Activity
>
>
>  
> Hi All,
> Providing the weather holds I,m planning to head to the hills again tomorrow evening 27th July from about 19:00 GMT
>
> The transverter has been repaired with huge thanks to Sam G4DDK. Hopefully I will be able to hear a few more of you this time round!
>
> The locator will still be IO74AI but at different location which is only 1000' ASL.
> I plan to be on KST provided I have mobile coverage
>
> Gordon
> GI6ATZ
>



Re: Sources of medium-spec xtals?

Ian White
 

Mark <vk5eme@...> wrote:
Hi Ian I have quite a few in stock for the various microwave bands at $30ea AUD if this helps. I get them made by Krystaly in the Czec Republic. Typical spec is AT 5th 1ppm 60deg C HC-49/U

Regards mark VK5EME
Thanks, Mark. The same recommendation for Krystaly came from Kevin ZL1UJG.

Has anyone in the UK tried Krystaly?


--

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

Re: Sources of medium-spec xtals?

Mark <vk5eme@...>
 

Hi Ian I have quite a few in stock for the various microwave bands at $30ea AUD if this helps. I get them made by Krystaly in the Czec Republic. Typical spec is AT 5th 1ppm 60deg C HC-49/U

Regards mark VK5EME

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


This arrived today:

I need to get a new crystal cut for my 4m transverter but from a brief
search I have been unable to find a suitable supplier. Do any of them
still exist who make one-offs to customers specifications? Any
suggestions? I would be very grateful.

73
Peter G3SJX
My sources are a bit out of date, so recommendations would be
appreciated, please (bearing in mind that this is not an outstandingly
high-stability application).



--

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

Re: GB3CSB now QRV 3400.985

gm4cxm <gm4cxm@...>
 

--- In ukmicrowaves@..., "David GM6BIG" <freevil@...> wrote:

Hi All,
GB3CSB is now fully operational on 3400.985, with periods of JT4g, CW, Plain carrier and Alternating 1S Tones.
Modulation is exactly the same as 23cm and 13cm.
GPS locked, 25W erp, flat panel beam on 150 deg, IO75xx
Many Thanks to all who have Helped and/or Donated to make this possible.
Reports Please !!
Cheers, David GM6BIG -- CSB Beaconkeeper.


The web page at http://www.rayjames.biz/id14.html has been updated with the current beacon information and list of those who have donated towards the running costs of the 3 GB3CSB beacons.

Thank you.

73 Ray GM4CXM

Re: Activity List for the UKuG 5.7/10/24GHz Cumulatives on 31 July 2011

Roger Ray
 

I shall be active for the contest period.

G8CUB/P JO01DH (location may change!)
5.7GHz 2.5W
10GHz 1.0W
24GHz 1.5W
all on 80cm dish 7m agl

Talkback:
144.175MHz
ON4KST
Mobile 07900 261121

73
Roger

Re: More 10 GHz Activity

Gordon GI6ATZ
 

Hi All,
Thanks to all those who took time to look for me last night. I had successful contacts with G4PBP and G4CBW and heard G8DTF briefly.

Unfortunately nothing heard from either G4DDK or G4BAO.

I'm planning to go to the GB3NGI beacon site (IO65VB) tomorrow to change out the 2 mtr antennas and I will be taking the 10 GHz gear with me. Keep a look out on KST for me from about 13:00 local.

I'm also planning to be out for a short while on Sunday morning for the 10 GHz contest but I'll confirm that on Saturday.

Gordon
GI6ATZ

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

Hi Gordon

I will be about this evening so I will watch KST.

73


Bob
G8DTF



________________________________
From: gi6atz <gordon.curry@...>
To: ukmicrowaves@...
Sent: Tuesday, 26 July 2011, 20:40
Subject: [ukmicrowaves] More 10 GHz Activity


 
Hi All,
Providing the weather holds I,m planning to head to the hills again tomorrow evening 27th July from about 19:00 GMT

The transverter has been repaired with huge thanks to Sam G4DDK. Hopefully I will be able to hear a few more of you this time round!

The locator will still be IO74AI but at different location which is only 1000' ASL.
I plan to be on KST provided I have mobile coverage

Gordon
GI6ATZ

Re: s-parameter conversion

Arie Dogterom <pa0ez@...>
 

One could ask why somebody would like to use a power ratio in the s-parameter area. Yes in fact powers are measured. The only advantage is that S21 directly indicates the insertion power gain.
73
Arie
 

----- Original Message -----
Sent: Wednesday, July 27, 2011 9:23 PM
Subject: Re: [ukmicrowaves] s-parameter conversion

 

S parameters are in units of root-power and they therefore are defined in terms of the 20.LOG form used for voltage and current.   In fact, AFAIK, V, I and S-paras are the only units to take that form.    It does means that S21 expressed in dB is directly the (sort of, anyway) power gain.  Well - it would be if matched
 
'jnt


 
On 27 July 2011 16:43, Arie Dogterom <pa0ez@...> wrote:
 

Hello Andy,
Yes you already indicated one of my later problems as I did not know which "kind"of dB was used. The idea is not too bad, but as I already wrote, I luckily found a lazy men's solution
Arie
 
----- Original Message -----
Sent: Wednesday, July 27, 2011 5:34 PM
Subject: Re: [ukmicrowaves] s-parameter conversion

 

deliberate mistook'..
 
should have read     value = 10^(dB/20)
 


 
On 27 July 2011 16:32, Andy Talbot <andy.g4jnt@...> wrote:
You could do it in Excel t....
 
  Import as text
  Add 4 columns for each linear amplitude value calculated from  20.LOG(value)
  copy back as values
  export as text
A real spreadsheet guru could probably  write a macro to do the job ;- ]
 
Andy
 

 
On 27 July 2011 16:21, Arie Dogterom <pa0ez@...> wrote:
 

Dr All,
My favorite microwave anaiyse programme is "PUFF". But I now have one problem: Puff only understands .s2p files with # GHz S MA R 50 parameters, i.e. amplitude/phase. But I now have an .s2p file based upon seemingly the same # GHz S MA R 50 but the amplitude values are in dB.  Is there a programme available to translate one into the other? Would save me a lot of time
73
Arie




Re: Solder

Geoff Blake <geoff@...>
 

Thanks Neil, John, Lehane, Dave, Andy and anybody I have missed.

Thanks for the info. An order has now been placed.

73 Geoff


--
###############################################
Geoff Blake,   G8GNZ    JO01fq:   Chelmsford,  Essex,  UK
<geoff@...>    or   <melecerties@...>
Using Linux: Ubuntu 11.04 on Intel or Debian on UltraSparc
and even on the NAS.     Avoiding Micro$oft like the plague.
###############################################

Re: Solder

Andy G4JNT
 

I got some from http://www.mrtechservices.co.uk/  as recommended on this group
 
Andy
'jnt


 

On 28 July 2011 15:01, Geoff Blake <geoff@...> wrote:
 

Hi folks,

I have just looked at my stock(?) of very thin leaded solder (for smt
work) and found it severly wanting - like I have none! ISTR that in
the past, folk have suggested suitable vendors. Would it be asking too
much for those suggestions again.

I have looked on Rapid's site but cannot find any suitable.

Apologies to those who will receive this twice.

Thanks Geoff

--
###############################################
Geoff Blake,   G8GNZ    JO01fq:   Chelmsford,  Essex,  UK
<geoff@...>    or   <melecerties@...>
Using Linux: Ubuntu 11.04 on Intel or Debian on UltraSparc
and even on the NAS.     Avoiding Micro$oft like the plague.
###############################################


Re: s-parameter conversion

Andy G4JNT
 

'ang on a sec !!!!!!!!!!!!
 
I don't play about with S-parameters mathematically, and certainly not in Excel.   That would be a futile and pointless excercise when there are so many other software packages that do it better!   All I originally suggested was Excel be used to convert dB  S-Paras to linear form for Puff to read.  A simple sum, and nothing to do with microwave design
 
Puff, and and other more comprehensive u-Wave design progs like Ansoft Designer will do all the difficult stuff for you.   But its not on my project to-do list ;-)
 
Andy

On 28 July 2011 14:45, geoffrey pike <gi0gdp@...> wrote:
 

Hi Arie,
yes i was having lunch with Sam and his wife a few weeks back and he was also telling me about this amazing IC. I hope Andy may do something with Excel on our behalf.
I have a spreadsheet which reads the s-parama file and gives some useful info.
I always use Puff first, and then other progs just to confirm the results, it is always correct !
regards from sunny offshore Den Helder
Geoff;-)

--- On Thu, 28/7/11, Arie Dogterom <pa0ez@...> wrote:

From: Arie Dogterom <pa0ez@...>
Subject: Re: [ukmicrowaves] s-parameter conversion
To: ukmicrowaves@...
Date: Thursday, 28 July, 2011, 9:53

 

Hello Geoffry,
Not yet thought about sofar. But indeed a good suggestion.  Till now I have always used those odd programmes in the test form besides free ones, like Puff.
Yesterday I could use Puff to see what the gain and input reflection is of the interesting IC Sam promoted, the SPF5043. Its S11 and S22 are amazingly good ( almost 20 dB over the usefull frequencies).
73
Arie
 
----- Original Message -----
Sent: Thursday, July 28, 2011 6:44 AM
Subject: Re: [ukmicrowaves] s-parameter conversion

 
Hi Arie,
As Andy said you could do the conversion in Excel, but i thought he was going to mention that Excel will also handle all the complex numbers from an S-parameter file to give you K, MAG and MSG, and you can set a look up table to read it into the spreadsheet and you can tell in a moment if you have an oscillator or a viable amplifier
regards
Geoff
It will also give new values for S11 and S21 for a conjugate match if S12 is significant in a suitable spreadsheet

--- On Wed, 27/7/11, Arie Dogterom <pa0ez@...> wrote:

From: Arie Dogterom <pa0ez@...>
Subject: Re: [ukmicrowaves] s-parameter conversion
To: ukmicrowaves@...
Date: Wednesday, 27 July, 2011, 20:27

 
Thank you for that info. I have much forgotten since university and never worked in radio.
73
arie
 
----- Original Message -----
Sent: Wednesday, July 27, 2011 9:23 PM
Subject: Re: [ukmicrowaves] s-parameter conversion

 
S parameters are in units of root-power and they therefore are defined in terms of the 20.LOG form used for voltage and current.   In fact, AFAIK, V, I and S-paras are the only units to take that form.    It does means that S21 expressed in dB is directly the (sort of, anyway) power gain.  Well - it would be if matched
 
'jnt


 
On 27 July 2011 16:43, Arie Dogterom <pa0ez@...> wrote:
 
Hello Andy,
Yes you already indicated one of my later problems as I did not know which "kind"of dB was used. The idea is not too bad, but as I already wrote, I luckily found a lazy men's solution
Arie
 
----- Original Message -----
Sent: Wednesday, July 27, 2011 5:34 PM
Subject: Re: [ukmicrowaves] s-parameter conversion

 
deliberate mistook'..
 
should have read     value = 10^(dB/20)
 


 
On 27 July 2011 16:32, Andy Talbot <andy.g4jnt@...> wrote:
You could do it in Excel t....
 
  Import as text
  Add 4 columns for each linear amplitude value calculated from  20.LOG(value)
  copy back as values
  export as text
A real spreadsheet guru could probably  write a macro to do the job ;- ]
 
Andy
 

 
On 27 July 2011 16:21, Arie Dogterom <pa0ez@...> wrote:
 
Dr All,
My favorite microwave anaiyse programme is "PUFF". But I now have one problem: Puff only understands .s2p files with # GHz S MA R 50 parameters, i.e. amplitude/phase. But I now have an .s2p file based upon seemingly the same # GHz S MA R 50 but the amplitude values are in dB.  Is there a programme available to translate one into the other? Would save me a lot of time
73
Arie




Re: Solder

Dave <dave@...>
 

----- Original Message -----
Subject: Re: [ukmicrowaves] Solder

>All the way down to 32swg and contains 2% Silver, which IMHO, is good.

Thanks for the link.
 
I forgot to jot down the suggested thickness of solder for beginners SMD work at Finningley. I wonder what people would recommend, or is it a case of getting some of every size?
 
Thanks.
 
Dave (G0DJA)
 
 

Re: Solder

Lehane Kellett G8KMH
 

On 28/07/2011 15:01, Geoff Blake wrote:
 

Hi folks,

I have just looked at my stock(?) of very thin leaded solder (for smt
work) and found it severly wanting - like I have none! ISTR that in
the past, folk have suggested suitable vendors. Would it be asking too
much for those suggestions again.

I have looked on Rapid's site but cannot find any suitable.

Apologies to those who will receive this twice.

Thanks Geoff

--
###############################################
Geoff Blake,   G8GNZ    JO01fq:   Chelmsford,  Essex,  UK
<geoff@...>    or   <melecerties@...>
Using Linux: Ubuntu 11.04 on Intel or Debian on UltraSparc
and even on the NAS.     Avoiding Micro$oft like the plague.
###############################################


Re: Solder

G3RIR <g3rir@...>
 

I bought from e-bay
0.3mm Solder Wire ( Very Fine ) (270556215935)

Neil, G3RIR

0.3mm Solder Wire ( Very Fine )
Item condition: New
Quantity:
More than 10 available / 171 sold
Price: 5.45

Item location: Lowestoft, Suffolk, United Kingdom

Visit shop: Ebay Shopselectronicspares

-----Original Message-----
From: Geoff Blake
Sent: Thursday, July 28, 2011 3:01 PM
To: ukmicrowaves@... ; codgerlist codgerlist
Subject: [ukmicrowaves] Solder

Hi folks,

I have just looked at my stock(?) of very thin leaded solder (for smt
work) and found it severly wanting - like I have none! ISTR that in
the past, folk have suggested suitable vendors. Would it be asking too
much for those suggestions again.

I have looked on Rapid's site but cannot find any suitable.

Apologies to those who will receive this twice.

Thanks Geoff

--
###############################################
Geoff Blake, G8GNZ JO01fq: Chelmsford, Essex, UK
<geoff@...> or <melecerties@...>
Using Linux: Ubuntu 11.04 on Intel or Debian on UltraSparc
and even on the NAS. Avoiding Micro$oft like the plague.
###############################################


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

Yahoo! Groups Links

Solder

Geoff Blake <geoff@...>
 

Hi folks,

I have just looked at my stock(?) of very thin leaded solder (for smt
work) and found it severly wanting - like I have none! ISTR that in
the past, folk have suggested suitable vendors. Would it be asking too
much for those suggestions again.

I have looked on Rapid's site but cannot find any suitable.

Apologies to those who will receive this twice.

Thanks Geoff

--
###############################################
Geoff Blake,   G8GNZ    JO01fq:   Chelmsford,  Essex,  UK
<geoff@...>    or   <melecerties@...>
Using Linux: Ubuntu 11.04 on Intel or Debian on UltraSparc
and even on the NAS.     Avoiding Micro$oft like the plague.
###############################################

Re: s-parameter conversion

geoffrey pike
 

Hi Arie,
yes i was having lunch with Sam and his wife a few weeks back and he was also telling me about this amazing IC. I hope Andy may do something with Excel on our behalf.
I have a spreadsheet which reads the s-parama file and gives some useful info.
I always use Puff first, and then other progs just to confirm the results, it is always correct !
regards from sunny offshore Den Helder
Geoff


--- On Thu, 28/7/11, Arie Dogterom wrote:

From: Arie Dogterom
Subject: Re: [ukmicrowaves] s-parameter conversion
To: ukmicrowaves@...
Date: Thursday, 28 July, 2011, 9:53

 

Hello Geoffry,
Not yet thought about sofar. But indeed a good suggestion.  Till now I have always used those odd programmes in the test form besides free ones, like Puff.
Yesterday I could use Puff to see what the gain and input reflection is of the interesting IC Sam promoted, the SPF5043. Its S11 and S22 are amazingly good ( almost 20 dB over the usefull frequencies).
73
Arie
 
----- Original Message -----
Sent: Thursday, July 28, 2011 6:44 AM
Subject: Re: [ukmicrowaves] s-parameter conversion

 
Hi Arie,
As Andy said you could do the conversion in Excel, but i thought he was going to mention that Excel will also handle all the complex numbers from an S-parameter file to give you K, MAG and MSG, and you can set a look up table to read it into the spreadsheet and you can tell in a moment if you have an oscillator or a viable amplifier
regards
Geoff
It will also give new values for S11 and S21 for a conjugate match if S12 is significant in a suitable spreadsheet

--- On Wed, 27/7/11, Arie Dogterom wrote:

From: Arie Dogterom
Subject: Re: [ukmicrowaves] s-parameter conversion
To: ukmicrowaves@...
Date: Wednesday, 27 July, 2011, 20:27

 
Thank you for that info. I have much forgotten since university and never worked in radio.
73
arie
 
----- Original Message -----
Sent: Wednesday, July 27, 2011 9:23 PM
Subject: Re: [ukmicrowaves] s-parameter conversion

 
S parameters are in units of root-power and they therefore are defined in terms of the 20.LOG form used for voltage and current.   In fact, AFAIK, V, I and S-paras are the only units to take that form.    It does means that S21 expressed in dB is directly the (sort of, anyway) power gain.  Well - it would be if matched
 
'jnt


 
On 27 July 2011 16:43, Arie Dogterom <pa0ez@...> wrote:
 
Hello Andy,
Yes you already indicated one of my later problems as I did not know which "kind"of dB was used. The idea is not too bad, but as I already wrote, I luckily found a lazy men's solution
Arie
 
----- Original Message -----
Sent: Wednesday, July 27, 2011 5:34 PM
Subject: Re: [ukmicrowaves] s-parameter conversion

 
deliberate mistook'..
 
should have read     value = 10^(dB/20)
 


 
On 27 July 2011 16:32, Andy Talbot <andy.g4jnt@...> wrote:
You could do it in Excel t....
 
  Import as text
  Add 4 columns for each linear amplitude value calculated from  20.LOG(value)
  copy back as values
  export as text
A real spreadsheet guru could probably  write a macro to do the job ;- ]
 
Andy
 

 
On 27 July 2011 16:21, Arie Dogterom <pa0ez@...> wrote:
 
Dr All,
My favorite microwave anaiyse programme is "PUFF". But I now have one problem: Puff only understands .s2p files with # GHz S MA R 50 parameters, i.e. amplitude/phase. But I now have an .s2p file based upon seemingly the same # GHz S MA R 50 but the amplitude values are in dB.  Is there a programme available to translate one into the other? Would save me a lot of time
73
Arie