Date   

Re: Réf. : Re: Re: 5.7 GHz PAs

geoffrey pike
 

Just to confirm some numbers, with the SMAs changed and at 5.750 GHz
21.4 dBm in gives 36 dBm out or 140 mW in for 4 watts out and only slightly compressed.
So perhaps an out board wilkinson  combiner/splitter  for some more power using two of these.
Geoff
GI0GDP
the cover was not fitted at this time.



On Friday, 26 August 2016, 20:08, "Andy Talbot andy.g4jnt@... [ukmicrowaves]" wrote:


 
After a few minutes at over 4 Watts 100% dutu cycle mine dropped power suddenly by about 3dB, but after turning off then allowing to cool, full power was restored.   The LED / PSU was fine.

So it down look as if the advised levels of 3 Watts continuous and 4.5Watts max should be adhered to.

Did you try it after cooling down ?    The SMPSU chip may have an over-temperature cutout.

'jnt


On 26 August 2016 at 19:52, g4cch_1@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 
I changed the connectors on mine today, and all was working fine and I saw abt 4.5W.
Now I have lost outout, and the red LED on the heatsink side of the pcb is no longer lit.
I guess the on board psu has died or something more serious...??
Will remove the can and have a look later...

Best 73, Howard - G4CCH




24GHz gear at Crawley

STEPHEN COOKE
 

Due to a change in circumstances , there will be one possibly two 24GHz
transverters for sale at Crawley .

Both are 432 MHz I.F. , based on the Alcatel " white box " modules
and fully working ..... 500mW output if I remember correctly ... I will
check the paperwork .

Looks like there will be lots of goodies for sale on Sunday !

Steve G1MPW


Re: Crawley Round table. G4BAO kits update.

g4bao
 

No. It's all on www.g4bao.com


On 13 Sep 2016 20:02, "'Paul Bicknell' paul@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

Hi John

Could you please post the specification for the 2.5 watt pa kit on this site also the cost ?

 


From: ukmicrowaves@... [mailto:ukmicrowaves@yahoogroups.com]
Sent: 13 September 2016 10:46
To: Ukmicrowaves (ukmicrowaves@...)
Subject: [ukmicrowaves] Crawley Round table. G4BAO kits update.

 

 

Hi Folks
I now have just ONE 45 Watt 23cm PA kit left and have no plans to make any more unless there is a sudden large uptick in demand.

First email (and subsequent payment!) gets the kit, or if not I'll bring it to Crawley on Sunday.

I still have plenty of the 2.5 watts driver kits so If you want to collect one from Crawley on Sunday please email me and I'll bring enough for all.

73

John

 

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Checked by AVG - www.avg.com
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Microwave equipment for sale

Steve G4HTZ
 

Got the following equipment for sale ...going to Crawley Sunday

Downeast microwave 2w in 8w+ out 10ghz amp
3.4ghz PLL lnb ..new ..ideal for 3.4ghz ATV repeaters
DB6NT 10ghz 200mw ATV TX plus DG0VE baseband modulator
10ghz LNBs modified for 9ghz LO
23/24cms G1MFG TX board , display board and 1w amp..built into box..needs finishing.
10ghz dish with waveguide / dipole feed.
2x lengths flexi waveguide wg16

Any interest please e mail direct ..and I will provide further details
Essexsteve@icloud.com

Steve G4HTZ


Re: 3cm good this morning

Mark Turner <ei3kd@...>
 

WebSDR is rx JO21, JO22 and JO34 beacons this (14th Sep) morning on 3cms, very strong!

Regards,

Mark EI3KD


On 13/09/2016 09:46, martin_ehrenfried@... [ukmicrowaves] wrote:
 

HI All,


3cm is very good this morning - lots of beacons to be seen on the SUWS WEB SDR.


Regards,


Martin - G8JNJ


www.g8jnj.net

www.tc2m.info

http://websdr.suws.org.uk




Re: Test Equipment for Sale

Dave G8KHU
 

Sorry there is a typo on the list, the HP473B power meter should read HP437B


Re: calling / working frequency

Wolfgang Hoeth OE4WOG
 

 
 
------ Originalnachricht ------
Von: "'Paul Bicknell' paul@... [ukmicrowaves]" <ukmicrowaves@...>
Gesendet: 13.09.2016 20:53:00
Betreff: RE: [ukmicrowaves] calling / working frequency
 

 

Hi Wolfgang

 

Interesting  the reason I asked the question  is I have two 76 Ghz transceivers that I need to re Xtal

I am also looking for a local oscillator chine to use at 135Ghz

 

So from your note 76,032,1   is not preferred and I have been told the UK have moved from

76,032,1  to 75.967,1  have I got this correct

 

Regards Paul B

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 12 September 2016 19:23
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] calling / working frequency

 

 

24.048,1

48.088,1

76,032,1   note 1

134.928,1 note 2

 

note 1: not preferred ( because of second allocation to amateur radio ) but still used widely in Central Europe

note 2: according to IARU Region 1 frequency allocation, used only in Central Europe

 

BTW: asking for changes in frequency plans and allocations may not accepted at the time being, but more detail explanations will help to understand the issue(s) 

 

73 de Wolfgang,  OE4WOG

microwave manager OEVSV

 

------ Originalnachricht ------

Von: "paul@... [ukmicrowaves]" <ukmicrowaves@...>

Gesendet: 09.09.2016 11:56:33

Betreff: [ukmicrowaves] calling / working frequency

 

 

Hi all could someone please help with the calling / working frequency that are currently being used and if there is any intention to change them

The bands of interest are    24 , 47 , 76 , 135  Ghz 

Regards Paul B

 

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Checked by AVG - www.avg.com
Version: 2016.0.7752 / Virus Database: 4649/13011 - Release Date: 09/13/16


Re: LM2596S-ADJ Ebay modules

Andy G4JNT
 

I wasn't concerned with RF suppression from the module - that was dealt with elsewhere in the beacon source.

Its not noise from the 19V PSU source you need to concern yourself with, its making sure there is a low enough dynamic source impedance to cope with the  LM2596 on period.   Output C then defines the output ripple.    

The input C is by far the more important in boost converters - those that step a voltage up - as it has to supply the energy to be stored in the L during the on cycle.    Buck converters like these - ie. step down, are rather more benign as teh current through the output  L is essentially continuous so current spikes aren't so big.   

Lots of small low EST caps are better than one big one.

'jnt


On 13 September 2016 at 20:12, 'g8zha' g8zha@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Just had a look at the ON Semiconductors data sheet. It recommends 100u on the input and 220-470u on the output. Did you add any small 10n caps to stop any HF on the output?

 

I am using one to power a Rubiduim 10MHz reference at 15V from a computer 19V PSU. I have included lots of L and C on the input as I reckoned the computer PSU would be quite noisy.

 

I will change the input and output caps for some Lo ESR types at work tomorrow, and add some L on the output of the module.

 

Thanks for your comments. Rich

 

From: ukmicrowaves@... [mailto:ukmicrowaves@yahoogroups.com]
Sent: 13 September 2016 17:46
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] LM2596S-ADJ Ebay modules

 




I stuck more C on the output and more C on the input.   They don't have enough input or output C even according to the data sheet recommendations.   Some input and output L and further RF decoupling  might help if you get radiated interference issues, but that wasn't a problem here.

 

'jnt

 

 

On 13 September 2016 at 17:42, 'g8zha' g8zha@... [ukmicrowaves] <ukmicrowaves@...> wrote:

 

I saw that Andy G4JNT used one of these modules in a recent project but said they needed  a few mods to improve the performance. Looking on the ’net suggests an additional coil and capacitor low pass filter on the output.

 

I wonder what you did Andy?

 

Regards, Rich

 

 






Re: Crawley Round table. G4BAO kits update.

Paul G8KFW
 

Thank you Steve  thought  it might create a bit of interest Paul B

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 13 September 2016 20:11
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Crawley Round table. G4BAO kits update.

 

 

In case John doesn't reply for a while details are on his website with downloads 

 

Steve G4HTZ


On 13 Sep 2016, at 20:02, 'Paul Bicknell' paul@... [ukmicrowaves] <ukmicrowaves@...> wrote:

 

Hi John

Could you please post the specification for the 2.5 watt pa kit on this site also the cost ?

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 13 September 2016 10:46
To: Ukmicrowaves (ukmicrowaves@...)
Subject: [ukmicrowaves] Crawley Round table. G4BAO kits update.

 

 

Hi Folks
I now have just ONE 45 Watt 23cm PA kit left and have no plans to make any more unless there is a sudden large uptick in demand.

First email (and subsequent payment!) gets the kit, or if not I'll bring it to Crawley on Sunday.

I still have plenty of the 2.5 watts driver kits so If you want to collect one from Crawley on Sunday please email me and I'll bring enough for all.

73

John

 

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7752 / Virus Database: 4649/13011 - Release Date: 09/13/16

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7797 / Virus Database: 4656/13011 - Release Date: 09/13/16


Re: LM2596S-ADJ Ebay modules

g8zha <g8zha@...>
 

Just had a look at the ON Semiconductors data sheet. It recommends 100u on the input and 220-470u on the output. Did you add any small 10n caps to stop any HF on the output?

 

I am using one to power a Rubiduim 10MHz reference at 15V from a computer 19V PSU. I have included lots of L and C on the input as I reckoned the computer PSU would be quite noisy.

 

I will change the input and output caps for some Lo ESR types at work tomorrow, and add some L on the output of the module.

 

Thanks for your comments. Rich

 

From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 13 September 2016 17:46
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] LM2596S-ADJ Ebay modules

 




I stuck more C on the output and more C on the input.   They don't have enough input or output C even according to the data sheet recommendations.   Some input and output L and further RF decoupling  might help if you get radiated interference issues, but that wasn't a problem here.

 

'jnt

 

 

On 13 September 2016 at 17:42, 'g8zha' g8zha@... [ukmicrowaves] <ukmicrowaves@...> wrote:

 

I saw that Andy G4JNT used one of these modules in a recent project but said they needed  a few mods to improve the performance. Looking on the ’net suggests an additional coil and capacitor low pass filter on the output.

 

I wonder what you did Andy?

 

Regards, Rich

 

 





Re: Crawley Round table. G4BAO kits update.

Steve G4HTZ
 

In case John doesn't reply for a while details are on his website with downloads 

Steve G4HTZ

On 13 Sep 2016, at 20:02, 'Paul Bicknell' paul@... [ukmicrowaves] <ukmicrowaves@...> wrote:

 

Hi John

Could you please post the specification for the 2.5 watt pa kit on this site also the cost ?

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 13 September 2016 10:46
To: Ukmicrowaves (ukmicrowaves@...)
Subject: [ukmicrowaves] Crawley Round table. G4BAO kits update.

 

 

Hi Folks
I now have just ONE 45 Watt 23cm PA kit left and have no plans to make any more unless there is a sudden large uptick in demand.

First email (and subsequent payment!) gets the kit, or if not I'll bring it to Crawley on Sunday.

I still have plenty of the 2.5 watts driver kits so If you want to collect one from Crawley on Sunday please email me and I'll bring enough for all.

73

John

 

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7752 / Virus Database: 4649/13011 - Release Date: 09/13/16


Re: Crawley Round table. G4BAO kits update.

Paul G8KFW
 

Hi John

Could you please post the specification for the 2.5 watt pa kit on this site also the cost ?

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 13 September 2016 10:46
To: Ukmicrowaves (ukmicrowaves@...)
Subject: [ukmicrowaves] Crawley Round table. G4BAO kits update.

 

 

Hi Folks
I now have just ONE 45 Watt 23cm PA kit left and have no plans to make any more unless there is a sudden large uptick in demand.

First email (and subsequent payment!) gets the kit, or if not I'll bring it to Crawley on Sunday.

I still have plenty of the 2.5 watts driver kits so If you want to collect one from Crawley on Sunday please email me and I'll bring enough for all.

73

John

 

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7752 / Virus Database: 4649/13011 - Release Date: 09/13/16


Re: calling / working frequency

Paul G8KFW
 

Hi Wolfgang

 

Interesting  the reason I asked the question  is I have two 76 Ghz transceivers that I need to re Xtal

I am also looking for a local oscillator chine to use at 135Ghz

 

So from your note 76,032,1   is not preferred and I have been told the UK have moved from

76,032,1  to 75.967,1  have I got this correct

 

Regards Paul B

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 12 September 2016 19:23
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] calling / working frequency

 

 

24.048,1

48.088,1

76,032,1   note 1

134.928,1 note 2

 

note 1: not preferred ( because of second allocation to amateur radio ) but still used widely in Central Europe

note 2: according to IARU Region 1 frequency allocation, used only in Central Europe

 

BTW: asking for changes in frequency plans and allocations may not accepted at the time being, but more detail explanations will help to understand the issue(s) 

 

73 de Wolfgang,  OE4WOG

microwave manager OEVSV

 

------ Originalnachricht ------

Von: "paul@... [ukmicrowaves]" <ukmicrowaves@...>

Gesendet: 09.09.2016 11:56:33

Betreff: [ukmicrowaves] calling / working frequency

 

 

Hi all could someone please help with the calling / working frequency that are currently being used and if there is any intention to change them

The bands of interest are    24 , 47 , 76 , 135  Ghz 

Regards Paul B

 

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7752 / Virus Database: 4649/13011 - Release Date: 09/13/16


Anyone QRV cm RS now via IN99 ?

F6DZK Michel
 

Anyone QRV cm RS now via IN99 ?
73 Michel F6DZK


Re: LM2596S-ADJ Ebay modules

Andy G4JNT
 

I stuck more C on the output and more C on the input.   They don't have enough input or output C even according to the data sheet recommendations.   Some input and output L and further RF decoupling  might help if you get radiated interference issues, but that wasn't a problem here.

'jnt


On 13 September 2016 at 17:42, 'g8zha' g8zha@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

I saw that Andy G4JNT used one of these modules in a recent project but said they needed  a few mods to improve the performance. Looking on the ’net suggests an additional coil and capacitor low pass filter on the output.

 

I wonder what you did Andy?

 

Regards, Rich

 



LM2596S-ADJ Ebay modules

g8zha <g8zha@...>
 

I saw that Andy G4JNT used one of these modules in a recent project but said they needed  a few mods to improve the performance. Looking on the ’net suggests an additional coil and capacitor low pass filter on the output.

 

I wonder what you did Andy?

 

Regards, Rich

 


hupRF at RSGB Hamfest

dave powis <g4hup@...>
 

Further to my previous e-mail, there has been a change of plan due to an accident (not mine!)

I will now be trading as planned from the flea market on Friday 30th Sept.

I will also be present at the Hamfest on Saturday 1 Oct, but will be primarily on the RSGB TEC/Exams stand.  So if you are coming along to the Hamfest on Saturday, please come and find me there, and we can sort out whatever you need - I will still have the remaining stock that has not sold on Friday available....see http://hupRF.com


Best 73,
Dave


DB6NT Sale

geoffrey pike
 

Judging by the prices of the microwave transverters in the DB6NT offers pages one is left to imagine they are
all going to get a 21st century make over like the 13cm one reviewed in Radcom last.
The prices even at 1.18 euro to the pound are attractive.
regards
Geoff
GI0GDP


Re: Test Equipment for Sale

Dave G8KHU
 

Thanks Steve, as suggested here is the list. If anyone's interested email me direct at david@fielding-electronics dot co dot uk


Tektronix TDS2024 Colour LCD Digital Oscilloscope
 4 Channel 200MHz 2GS/s
 Has RS232 / GPIB / Parallel Printer Port module fitted


HP8558B Spectrum Analyser in HP182T mainframe
 0.1 - 1500MHz All analog analyser
 1kHz to 3MHz resolution bandwidths
 0Hz to 100 MHz span/division


HP3585A Spectrum Analyser
 20Hz to 40MHz
 

HP339A  Distortion Measurment Set
 All analog audio analyser


HP435A Power Meter with Sensor Lead


HP473B Power meter with Sensor Lead


HP8481A Power Sensor 10MHz to 18GHz, -30dBm to +20dBm


HP8482A Power Sensor 100kHz to 4.2GHz, -30dBm to +20dBm


HP8484A Power Sensor 10MHz to 18GHz, -70dBm to -20dBm with Calibration Attenuator
 There are two of these available, one cosmetically good and one scruffy


HP8657A Signal Generator
 0.1 - 1040MHz


HP8642A Signal Generator

100kHz - 1050 MHz
 There are two of these available, each one has minor display faults (a couple of duff LCD segments)


HP8643A 10kHz - 1280MHz Signal Generator

 ******* Very high spec generator but has FAULT ******

 Randomly resets itself, sometimes will go for days OK and other times resets every couple of minutes.
 (I THINK that this is may be a RAM problem but can't be certain)
 Has nice sweep mode too
 Set of photocopied manuals
 In view of known fault this is sold as SPARES/REPAIRS and priced accordingly


Fireberd 6000 BER Test Set
 Two available - scruffy


Philips PM3585 Logic Analyser
 Two available - both have wavy displays (crt display - probably PSU ripple)
 Rubber type keys are iffy - last time a dose of the silver paint type contact treatment sorted them out
 With lots of pods, manuals and operating system discs


HP7035B X-Y Plotter
 Plot to A4 from analogue source eg XY O/Ps of spec an
 Has a few working pens


HP7440A Color Pro GPIB plotter
 Suits older Network anlayser etc
 Has a few working pens


Racal 9919 Frequency counter
 1GHz
 Option 04A timebase (OCXO)


Dave G8KHU




Re: Test Equipment for Sale

Steve G4HTZ
 

I've posted equipment for sale on here as have others ...so post away.
Maybe list what you have without prices ?? And people can contact you direct if interested ....

Well that's my thoughts
Steve G4HTZ


On 13 Sep 2016, at 11:59, david@... [ukmicrowaves] <ukmicrowaves@...> wrote:

 

Hi all,


I have some test equipment that's looking for a new home and am intending to take it to Crawley this weekend. There is too much to put in the car so I'd like to post the list with prices and see what the interest is.


As I'm new to the group and I don't know what the group etiquette is about such posts - and I don't want to offend anyone


Is it OK to post the list directly on the site or is the protocol to put a general note up so people can email for full details?


73 Dave G8KHU