Date   

Re: Nearly Off-topic

g4uvz@...
 

Chris GW4DGU is your man! He was the designer / manufacturer ,,he is on this forum


Adrian G4UVZ


Nearly Off-topic

oz4vw@...
 

Hello

Need a bit old Old Ham knowledge


One of my friend have found a Mutek LNA 432

Anyone there have data for this


Internet is blank


Br Arne OZ4VW


Re: Activity List for UK Microwave Group Low Band Contest Sunday 8th May

Phil Guttridge G3TCU
 

We'll be out for the May session:

Callsign: M0HNA/P
Locator: IO91RF
Bands: 1.3GHz 250W 67ele
2.3GHz 60W 0.9m dish
3.4GHz 15W 0.75m dish
Talkback: ON4KST, direct CQ on 23cm.
Times: Throughout the event

73, Phil G3TCU




On 02/05/2016 21:54, G3XDY g3xdy@... [ukmicrowaves] wrote:
 

I will assemble the usual activity list for the UKuG Low Band Contest
this coming Sunday 8th May.

It takes place from 08:00 to 14:00 GMT (09:00 to 15:00 BST) on 1.3, 2.3
and 3.4GHz.

This event is coordinated with the IARU/RSGB events over the weekend of
7/8th May, so there should be a reasonable activity level with some
continental stations to work.

If you are taking part in the other events as well then you don't need
to start your serial numbers from 001 for the UKuG event.

Please send your activity plans in the format below, to reach me by
close of play on Friday. I will publish the list on Saturday morning.

Callsign: G3XDY

Locator: JO02OB

Bands: 1.3GHz 400W 4x23ele

2.3GHz 100W 0.8m dish

3.4GHz 20W 0.8m dish

Talkback: Direct CQ on 1.3GHz, ON4KST and 144MHz

Times: Throughout.

73

John G3XDY

UkuG Contest Manager

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus



Re: Fans

Michael Scott
 

Hi Nick and John
 
Many thanks for the info. I was going to use the cpu fan to cool the copper slab on which a 1 watt 10GHz amplifier is mounted. The tip about the ferrite beads is useful and easy to do as the wires are very thin.
 
73, Mike
 

Sent: Wednesday, May 4, 2016 11:34 AM
Subject: Re: [ukmicrowaves] Fans
 
 

Hi Mike,
 
The white wire is used to count pulses from the fan and used to control it’s speed. Be careful with computer ect DC fans as they use electronic circuitry to control the speed and are vulnerable to high RF fields. I have blown several up due to this. You need to apply ferrite beads as close to where the wires terminate on the fan as possible, and decoupling capacitors are a good idea as well. I generally run them constantly on TX and employ a 50C thermal switch on the heatsink which runs them continually if the heatsink temperature demands it.
 
Regards,
 
Nick G4KUX
 
Sent: Wednesday, May 04, 2016 11:16 AM
Subject: [ukmicrowaves] Fans
 
 

Hi All
 
Sorry this is a bit OT.
 
I have a couple of small fans I want to use to cool a heat sink. One is on a small heat sink and looks as if it was intended to cool a CPU, the other is off a defunct DVD recorder. Both have three wires, red, black and white. DC applied to the red and black cause the fan to rotate. The question is, what is the purpose of the white wire?
 
Thanks in anticipation!
 
73, Mike, G3LYP


Re: Fans

Nick Peckett G4KUX
 

Hi Mike,
 
The white wire is used to count pulses from the fan and used to control it’s speed. Be careful with computer ect DC fans as they use electronic circuitry to control the speed and are vulnerable to high RF fields. I have blown several up due to this. You need to apply ferrite beads as close to where the wires terminate on the fan as possible, and decoupling capacitors are a good idea as well. I generally run them constantly on TX and employ a 50C thermal switch on the heatsink which runs them continually if the heatsink temperature demands it.
 
Regards,
 
Nick G4KUX
 

Sent: Wednesday, May 04, 2016 11:16 AM
Subject: [ukmicrowaves] Fans
 
 

Hi All
 
Sorry this is a bit OT.
 
I have a couple of small fans I want to use to cool a heat sink. One is on a small heat sink and looks as if it was intended to cool a CPU, the other is off a defunct DVD recorder. Both have three wires, red, black and white. DC applied to the red and black cause the fan to rotate. The question is, what is the purpose of the white wire?
 
Thanks in anticipation!
 
73, Mike, G3LYP


Re: Fans

John Quarmby
 

Hi Mike

This link gives a bit of info on the various fan wiring arrangements. I think its safe to say you can ignore the white wire, just leave it isolated.

http://pcbheaven.com/wikipages/How_PC_Fans_Work/

73

John G3XDY

On 04/05/2016 10:16, 'Michael Scott' g3lyp@... [ukmicrowaves] wrote:
Hi All
Sorry this is a bit OT.
I have a couple of small fans I want to use to cool a heat sink. One is on a small heat sink and looks as if it was intended to cool a CPU, the other is off a defunct DVD recorder. Both have three wires, red, black and white. DC applied to the red and black cause the fan to rotate. The question is, what is the purpose of the white wire?
Thanks in anticipation!
73, Mike, G3LYP


Virus-free. www.avast.com


Fans

Michael Scott
 

Hi All
 
Sorry this is a bit OT.
 
I have a couple of small fans I want to use to cool a heat sink. One is on a small heat sink and looks as if it was intended to cool a CPU, the other is off a defunct DVD recorder. Both have three wires, red, black and white. DC applied to the red and black cause the fan to rotate. The question is, what is the purpose of the white wire?
 
Thanks in anticipation!
 
73, Mike, G3LYP


Activity List for UK Microwave Group Low Band Contest Sunday 8th May

John Quarmby
 

I will assemble the usual activity list for the UKuG Low Band Contest this coming Sunday 8th May.

It takes place from 08:00 to 14:00 GMT (09:00 to 15:00 BST) on 1.3, 2.3 and 3.4GHz.


This event is coordinated with the IARU/RSGB events over the weekend of 7/8th May, so there should be a reasonable activity level with some continental stations to work.

If you are taking part in the other events as well then you don't need to start your serial numbers from 001 for the UKuG event.


Please send your activity plans in the format below, to reach me by close of play on Friday. I will publish the list on Saturday morning.

Callsign: G3XDY

Locator: JO02OB

Bands: 1.3GHz 400W 4x23ele

2.3GHz 100W 0.8m dish

3.4GHz 20W 0.8m dish

Talkback: Direct CQ on 1.3GHz, ON4KST and 144MHz

Times: Throughout.


73

John G3XDY

UkuG Contest Manager


Re: DEM 180 MHz xtal

John E. Beech
 

Thanks Ian,
                   I've e-mailed DEM. I've also had a closer look at their LO frequencies. I actually need a crystal for 179.666 MHz to cover 2300.000 to 2302.000 MHz with 144-146 MHz IF. I'm wondering if the existing xtal ( which I think is 180 MHz) will pull down to this frequency.

           If it will it will make the job a whole lot easier!
 
de John G8SEQ

  -------Original Message-------
From: ian ian@... [ukmicrowaves]
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] DEM 180 MHz xtal
Sent: May 02 '16 10:28

 
Not had Microwave stuff from DEM, but Had 144mhz kit and found them very helpful, I'd send them a email
 
http://www.downeastmicrowave.com/articles.asp?id=259
 
Ian
2E0IJH
 
Sent: Monday, May 02, 2016 at 10:19 AM
From: "john@... [ukmicrowaves]"
To: "ukmicrowaves@..."
Subject: [ukmicrowaves] DEM 180 MHz xtal
 

 

Hi All,
         Would anyone here have a 180 MHz xtal suitable for a Down East Microwave transverter? Why, the person who bought the kit forgot to specify the xtal frequency and it came witht he one for the higherpart of the band. ( I did a qick search of DEM & got zilch.) Anyone know the spec so I can order one from somewhere.
 
de John G8SEQ

 

 


Re: DEM 180 MHz xtal

ian hope (2E0IJH)
 

Not had Microwave stuff from DEM, but Had 144mhz kit and found them very helpful, I'd send them a email
 
http://www.downeastmicrowave.com/articles.asp?id=259
 
Ian
2E0IJH

 
Sent: Monday, May 02, 2016 at 10:19 AM
From: "john@... [ukmicrowaves]"
To: "ukmicrowaves@..."
Subject: [ukmicrowaves] DEM 180 MHz xtal
 

 

Hi All,
         Would anyone here have a 180 MHz xtal suitable for a Down East Microwave transverter? Why, the person who bought the kit forgot to specify the xtal frequency and it came witht he one for the higherpart of the band. ( I did a qick search of DEM & got zilch.) Anyone know the spec so I can order one from somewhere.
 
de John G8SEQ

 


DEM 180 MHz xtal

John E. Beech
 

Hi All,
         Would anyone here have a 180 MHz xtal suitable for a Down East Microwave transverter? Why, the person who bought the kit forgot to specify the xtal frequency and it came witht he one for the higherpart of the band. ( I did a qick search of DEM & got zilch.) Anyone know the spec so I can order one from somewhere.
 
de John G8SEQ


Ancient microwave diodes

Graham G3TCT
 

Hi all

I've been donated some diodes described as best I can in the attached. Not sure how to describe the packages correctly. Free to a good home.

73
Graham


REV-16 relay

mike G6TRM
 

Hi,
I have a couple of REV-16 Russian relays, which I believe are good for use at 23cm.  I am considering using one for my 23cm 150W amplifier, Does anyone have any experience of using them at this power level?

thanks

Mike G6TRM


Re: 2300 Antenna still up and PI4 test signal ready to go

John Quarmby
 

Hi David


This was proposed in the UK Microwave Group Contest Forum at Martlesham, and I will adopt it for the UKuG events for 2017. I will also propose it counts as a separate band for the RSGB SHF UKAC too, but there a couple of caveats - the NoV for 2300MHz is only available to Full licence holders, so excludes Intermediates who can use 2320MHz, and its not available to GJ/GU/GD stations. There is a precedent for differential treatment of the licence classes in that Novices can't operate on the 2.3/3.4/5.7GHz bands. Watch this space, I will report back after the VHF Contests review is completed.


73

John G3XDY
UKuG Contest Manager, RSGB VHFCC member.

On 27/04/2016 11:27, David Warr g4rqi@... [ukmicrowaves] wrote:
Hello

If you want to generate more interest in 2300Mhz then maybe one option would be to get it recognised as a separate band in the UKAC next year. 

73 David

On 27 Apr 2016, at 09:33, "Andy Talbot andy.g4jnt@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 
I still have my helix antenna up the mast and the PI4 beacon setup ready to switch on if anyone is interested.   But there seemed no interest over the weekend other than Sam failing to get anything and Neil receiveing reliably on its sidelobes.

No requests to point anywhere else.

Sam, I think I know why the signal is poor with you.  There is a thick tree in the way.   Presumably, when you heard my 2.3GHz signal before it was during winter period when that tree was leafless.   Was it winter - I never kept a record ?  
   
If t'was summer and the tree was in leaf, conditions must have been well up, coz its on boresight to you!

Andy
 


Virus-free. www.avast.com


76GHz SDR Available

Roger Ray
 

see the link below -

NI announces world’s first mmWave software defined radio to help speed 5G research

 






Re: 2300 Antenna still up and PI4 test signal ready to go

g4bao
 

So, start lobbying your contest committee rep!

Don't wait for others to do it.

The UKuG has a representative on the contest committee and has been instructed to bring up the topic on your behalf, but the more people that press for it the better.

73
John 
UKuG Treasurer 

On 27 April 2016 at 12:27, David Warr g4rqi@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Hello

If you want to generate more interest in 2300Mhz then maybe one option would be to get it recognised as a separate band in the UKAC next year. 

73 David

On 27 Apr 2016, at 09:33, "Andy Talbot andy.g4jnt@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

I still have my helix antenna up the mast and the PI4 beacon setup ready to switch on if anyone is interested.   But there seemed no interest over the weekend other than Sam failing to get anything and Neil receiveing reliably on its sidelobes.

No requests to point anywhere else.

Sam, I think I know why the signal is poor with you.  There is a thick tree in the way.   Presumably, when you heard my 2.3GHz signal before it was during winter period when that tree was leafless.   Was it winter - I never kept a record ?  
   
If t'was summer and the tree was in leaf, conditions must have been well up, coz its on boresight to you!

Andy
 



Re: 2300 Antenna still up and PI4 test signal ready to go

David Warr <g4rqi@...>
 

Hello

If you want to generate more interest in 2300Mhz then maybe one option would be to get it recognised as a separate band in the UKAC next year. 

73 David

On 27 Apr 2016, at 09:33, "Andy Talbot andy.g4jnt@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

I still have my helix antenna up the mast and the PI4 beacon setup ready to switch on if anyone is interested.   But there seemed no interest over the weekend other than Sam failing to get anything and Neil receiveing reliably on its sidelobes.

No requests to point anywhere else.

Sam, I think I know why the signal is poor with you.  There is a thick tree in the way.   Presumably, when you heard my 2.3GHz signal before it was during winter period when that tree was leafless.   Was it winter - I never kept a record ?  
   
If t'was summer and the tree was in leaf, conditions must have been well up, coz its on boresight to you!

Andy
 


Re: 2300 Antenna still up and PI4 test signal ready to go

Rob, M0DTS
 

I did have a listen here for a couple of hours at the weekend with 3m dish but nothing heard.
Was hearing ZME but that does not mean setup was good on 2300!

Rob
M0DTS
IO94IL



Sent from my Samsung device


-------- Original message --------
From: "Andy Talbot andy.g4jnt@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 27/04/2016 09:33 (GMT+00:00)
To: ukmicrowaves@..., uk_beacons@...
Subject: [ukmicrowaves] 2300 Antenna still up and PI4 test signal ready to go

 

I still have my helix antenna up the mast and the PI4 beacon setup ready to switch on if anyone is interested.   But there seemed no interest over the weekend other than Sam failing to get anything and Neil receiveing reliably on its sidelobes.

No requests to point anywhere else.

Sam, I think I know why the signal is poor with you.  There is a thick tree in the way.   Presumably, when you heard my 2.3GHz signal before it was during winter period when that tree was leafless.   Was it winter - I never kept a record ?  
   
If t'was summer and the tree was in leaf, conditions must have been well up, coz its on boresight to you!

Andy
 


Re: SMPS

David <david.g6feo@...>
 

Both power supplies are now spoken for.

David.
G6FEO.

On Tue, 2016-04-26 at 16:38 +0100, David david.g6feo@...
[ukmicrowaves] wrote:
Hello Group,

I've got 2 off Eltek SMPS 1800Si units, are they of any use to anybody?

I know they are mains in, 150 to 265v AC and 50v DC out, I presume from
the part number about 30A out.

I removed them from working equipment that I turned off, now I can't see
me using them.

Free to good home???? They are heavy, carriage collection negotiable.

regards,

David.
G6FEO.




------------------------------------
Posted by: David <david.g6feo@...>
------------------------------------


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

Yahoo Groups Links



2300 Antenna still up and PI4 test signal ready to go

Andy G4JNT
 

I still have my helix antenna up the mast and the PI4 beacon setup ready to switch on if anyone is interested.   But there seemed no interest over the weekend other than Sam failing to get anything and Neil receiveing reliably on its sidelobes.

No requests to point anywhere else.

Sam, I think I know why the signal is poor with you.  There is a thick tree in the way.   Presumably, when you heard my 2.3GHz signal before it was during winter period when that tree was leafless.   Was it winter - I never kept a record ?  
   
If t'was summer and the tree was in leaf, conditions must have been well up, coz its on boresight to you!

Andy