Date   

Re: Signal generator SSB phase noise comparison table

DD1US
 

Hi Conrad,

 

excellent. It will be great to add those devies. If I remember right the IFR signal generators were quite good at their time.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von Conrad, PA5Y
Gesendet:
Sonntag, 21. April 2019 20:15
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Signal generator SSB phase noise comparison table

 

Hi Matthias when I get the work FSUP back in 5 weeks I can add SML01, SMB100A SMA100A IFR 2026 and IFR2040 to the list but it will take some time.  I can do an SML01 right now with an E4406 but maybe close in I will be measuring the analyser. Both of these are in my shack.

 

73

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of DD1US via Groups.Io
Sent: 21 April 2019 16:58
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Signal generator SSB phase noise comparison table

 

Hi,

 

I started to compile a table with phase noise data of various signal generators.

 

When searching the web I did not find such a comparison table or viewgraphs.

 

Maybe I have missed it.

 

Any help on adding data to the table is highly appreciated.

 

You can either just edit the Excel table which you downloaded and send it to me by Email or
you can send me data or corrections directly by Email. My Email address is in the Excel sheet.

 

Also suggestions on what viewgraphs for easy comparison might be helpful are appreciated.

 

Here is the direct link to the table:

 

https://www.dd1us.de/Downloads/phase%20noise%20of%20signal%20generators%20rev1.xlsx

 

It is actually better to access the file from my website www.dd1us.de in the section “Ham Downloads”
as I will change the filename occasionally when major updates have been performed.

 

I appreciate any feedback / opinions / suggestions / data … many thanks in advance.

 

Kind regards

 

Matthias

 

www.dd1us.de

 


Re: Signal generator SSB phase noise comparison table

DD1US
 

Hi Richard,

 

I started out to compile a list of second hand signal generators but ended up adding some very recent devices for reference.

 

Anything is welcome but I’d rather prefer older equipment as it might come up for sale and it would be good to have the data at hand.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von Richard
Gesendet: Sonntag, 21. April 2019 20:04
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Signal generator SSB phase noise comparison table

 

 

Mattius

are you compiling a list of modern Sig gens , or those that often end up in Ham shacks. ?

Richard

 

 

On Sun, 2019-04-21 at 14:57 +0000, DD1US wrote:

Hi,

 

I started to compile a table with phase noise data of various signal generators.

 

When searching the web I did not find such a comparison table or viewgraphs.

 

Maybe I have missed it.

 

Any help on adding data to the table is highly appreciated.

 

You can either just edit the Excel table which you downloaded and send it to me by Email or
you can send me data or corrections directly by Email. My Email address is in the Excel sheet.

 

Also suggestions on what viewgraphs for easy comparison might be helpful are appreciated.

 

Here is the direct link to the table:

 

https://www.dd1us.de/Downloads/phase%20noise%20of%20signal%20generators%20rev1.xlsx

 

It is actually better to access the file from my website www.dd1us.de in the section “Ham Downloads”
as I will change the filename occasionally when major updates have been performed.

 

I appreciate any feedback / opinions / suggestions / data … many thanks in advance.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

-- 

 Best wishes /73 

 Richard Bown

 

 Email : richard@...

 

 HTTP  :  http://www.g8jvm.com

 

 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 

 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W

 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 

Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W

 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop

 ######################################################################

 


Re: Signal generator SSB phase noise comparison table

Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
 



On Sun, 21 Apr 2019 at 15:57, DD1US <matthias.bopp@...> wrote:

Hi,

 

I started to compile a table with phase noise data of various signal generators.

 

When searching the web I did not find such a comparison table or viewgraphs.

 

Maybe I have missed it.

 

Any help on adding data to the table is highly appreciated.

There is an old HP signal generator, with a sloping front panel, that is supposed to be very low phase noise, but I forget what the model number is. You may have it on your table anyway.

Some of the HP signal generators have a low phase noise option. For example, the 8665B option 004, but there are others. I don't know if they are selected versions of the basic unit, or are a fundamentally different design.

Just a suggestion. I would add whether the figures are typical or guaranteed, as sometimes different figures are given, or sometimes only one or the other.

Dave 

Kind regards

 

Matthias

 

www.dd1us.de

 

--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
https://www.kirkbymicrowave.co.uk/
Tel 01621-680100 / +44 1621-680100


Re: Signal generator SSB phase noise comparison table

Conrad, PA5Y
 

Hi Matthias when I get the work FSUP back in 5 weeks I can add SML01, SMB100A SMA100A IFR 2026 and IFR2040 to the list but it will take some time.  I can do an SML01 right now with an E4406 but maybe close in I will be measuring the analyser. Both of these are in my shack.

 

73

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of DD1US via Groups.Io
Sent: 21 April 2019 16:58
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Signal generator SSB phase noise comparison table

 

Hi,

 

I started to compile a table with phase noise data of various signal generators.

 

When searching the web I did not find such a comparison table or viewgraphs.

 

Maybe I have missed it.

 

Any help on adding data to the table is highly appreciated.

 

You can either just edit the Excel table which you downloaded and send it to me by Email or
you can send me data or corrections directly by Email. My Email address is in the Excel sheet.

 

Also suggestions on what viewgraphs for easy comparison might be helpful are appreciated.

 

Here is the direct link to the table:

 

https://www.dd1us.de/Downloads/phase%20noise%20of%20signal%20generators%20rev1.xlsx

 

It is actually better to access the file from my website www.dd1us.de in the section “Ham Downloads”
as I will change the filename occasionally when major updates have been performed.

 

I appreciate any feedback / opinions / suggestions / data … many thanks in advance.

 

Kind regards

 

Matthias

 

www.dd1us.de

 


Re: Signal generator SSB phase noise comparison table

Richard <richard@...>
 


Mattius
are you compiling a list of modern Sig gens , or those that often end up in Ham shacks. ?
Richard


On Sun, 2019-04-21 at 14:57 +0000, DD1US wrote:

Hi,

 

I started to compile a table with phase noise data of various signal generators.

 

When searching the web I did not find such a comparison table or viewgraphs.

 

Maybe I have missed it.

 

Any help on adding data to the table is highly appreciated.

 

You can either just edit the Excel table which you downloaded and send it to me by Email or
you can send me data or corrections directly by Email. My Email address is in the Excel sheet.

 

Also suggestions on what viewgraphs for easy comparison might be helpful are appreciated.

 

Here is the direct link to the table:

 

https://www.dd1us.de/Downloads/phase%20noise%20of%20signal%20generators%20rev1.xlsx

 

It is actually better to access the file from my website www.dd1us.de in the section “Ham Downloads”
as I will change the filename occasionally when major updates have been performed.

 

I appreciate any feedback / opinions / suggestions / data … many thanks in advance.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: 'NYK Boards From Martlesham

Alan Melia
 

Hi Andy thanks for the "plug"! As far as I could make out the modules are from an Aeroflex 6200 microwave test set. I thought they might be PXI interfaced but I have no experience of that bus. The cards with N-type connectors sold well, I have disembowelled a few other pcbs and the VCOs and mixers probably the synth chips seem to be on the modules with SMC bulkead connectors on long edge. I will retain "interesting looking cards" being mainly those suggested they contain RF devices. I will have them at the local Rally (ESWR) and at "RAL RT" (or whatever it is called now) and possibly Crawley RT. The less interesting parts (the processor modules, and the milled screening covers) will find their was to the local skip (so I can recover a small corner of my house at least).

I also have a quantity of Hittite/AD 394LP4E 5 bit 2.2GHz programmable counters and some Temic U893 1.3GHz pre-scalars both in SO 8 plastic, from another source.

I'm glad to be able to add to your "well stocked" junk box :-)) every Ham should have one!

Alan
G3NYK
alan dot melia (at) btinternet dot com

On 21/04/2019 15:34, Andy G4JNT wrote:
Alan was selling a number of boards and heavy-ish modules at MHM for £10 each (the whole modules).    They were believed to be "... from some sort of test set ..." and had lots of ICs and RF components on the three main PCBs.
I've now dismantled mine and with the aid of a hot air gun and removed the ICs I reckon are worth keeping for the junk box - ie. those that are immediately identifiable  and cost more than a few pence from Farnell
The ones salvaged ware :
2 x  AD9850 DDS  - we all know what that one does
10x AD847  50MHz bandwidth single opamp
4x  AD823A  17MHz B/W dual opamp
lots of Hittite H284 SPDT 0 - 4GHz switches
a few other assorted multiway Hittite RF switches
2x   ADF4113    4GHz synthesizer
ADF4001   Clock synchroniser / synthesizer
MACOM AT-260 digital attenuator 0 - 31dB   0 - 2GHz
AD7890   8 channel 12 bit A/D data acquisition chip
Vectron 10MHz TCXO
Various  l Z-COMM VCO modules in the 700 - 2000MHz range
Helical filters and ceramic filters in all the mobile phone bands
Other components like small RF gain blocks I didn't bother with as identification was uncertain, and they are cheap enough anyway - but there were quintillions of them to be had if you are that keen.   Also quite a lot of diode mixers (DBMs),  but I have loads anyway so not worth the effort
He still had plenty of boards when I left, so unless they have now gone in a skip - you know where to go.
Unfortunately, many of the devices are listed as obsolete, so no use for projects that are to be reproduced by others - but useful to have if you're doing a one-off
Andy
www.g4jnt.com <http://www.g4jnt.com>


Signal generator SSB phase noise comparison table

DD1US
 

Hi,

 

I started to compile a table with phase noise data of various signal generators.

 

When searching the web I did not find such a comparison table or viewgraphs.

 

Maybe I have missed it.

 

Any help on adding data to the table is highly appreciated.

 

You can either just edit the Excel table which you downloaded and send it to me by Email or
you can send me data or corrections directly by Email. My Email address is in the Excel sheet.

 

Also suggestions on what viewgraphs for easy comparison might be helpful are appreciated.

 

Here is the direct link to the table:

 

https://www.dd1us.de/Downloads/phase%20noise%20of%20signal%20generators%20rev1.xlsx

 

It is actually better to access the file from my website www.dd1us.de in the section “Ham Downloads”
as I will change the filename occasionally when major updates have been performed.

 

I appreciate any feedback / opinions / suggestions / data … many thanks in advance.

 

Kind regards

 

Matthias

 

www.dd1us.de

 


Re: Possible Personal Beacons in Coventry

Neil Smith G4DBN
 

Hi Iain, if you could get some beacons up with a mix of fast (JT9 fast) and slow modes (PI4 or JT4/JT9?), plus 30s or more of plain carrier and FSK CWID, that would be most useful for a mix of aircraft scatter, tropo/rainscatter and very deep FFT searches. If it can be GPS locked, even better.  I bet there is a big hill between us, but with low planes approaching East Midlands, and a bit of elevation, it might work, especially if you have a decent ERP. I am pulling out weak 10GHz beacons with 256k long FFTs which just can't be seen/heard on the usual waterfalls, but without a very VERY slow mode like one of the Ebnaut variants used at VLF, at maybe 10 seconds per symbol, decodes just are not possible.

Under normal conditions, I can't hear LEX on 3cm, but I can hear beacons much further away. As soon as there is a sniff or rainscatter, LEX pops up nicely on 3cm.

I'd say go for it.  If you build it, the users will appear.  We need to find ways to get more folks active, and having more personal beacons is a way to help encourage those with only receive capability to get fully on the bands.  Quite a few 6GHz-capable SDR boards out there now.

Neil G4DBN

On 21/04/2019 14:48, Iain Young wrote:

Hi Folks,

With several purchases of Eshail'2 related SDR's and associated gubbins,
with a little more outlay, I may have enough exciters, amplifiers, and
antennas for some (personal) beacons in Coventry (IO92fj) on 2.4, 3.4
and 5.6GHz. 1.3GHz is also possible, having done a FM Beacon from the
roof top and heard it the other side of Cov (~4-5 miles) in the past.

Before I go ahead and get the remaining bits for each band, I thought
I would gauge the interest here (and other places). My location has
a hill towards the North East/Leicester, but reasonably clear takeoff
150-330 degrees (The City Centre is at 150 degrees from me or there
abouts, 2 miles distant)

Height is likely to only be 5-8 metres AGL, and most likely they will
be omni antennas, so ~10dBi gain.

Would they be of use to anyone but me ?


73s

Iain


Re: for anyone with prosistel rotators

Richard <richard@...>
 



Well maybe the moderator should jump on those who think its amusing when someone gets injured.

Unless

Richard





On Sun, 2019-04-21 at 15:37 +0100, Richard wrote:

Dissapointing they were being sold, I would have thought the east coast mafia would have given them away.

But I guess they need to keep their funds up someway

Richard
DOn Sun, 2019-04-21 at 06:18 -0700, Steve G4HTZ via Groups.Io wrote:
So the G8JVM voodoo dolls complete with 10 pins being sold at martelsham do work then 😀
-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################

-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: for anyone with prosistel rotators

Andy G4JNT
 

If this thread is going to degenerate...
Need I say more ?

Andy     G4JNT
Group Owner



On Sun, 21 Apr 2019 at 15:38, Richard <richard@...> wrote:

Dissapointing they were being sold, I would have thought the east coast mafia would have given them away.

But I guess they need to keep their funds up someway

Richard
DOn Sun, 2019-04-21 at 06:18 -0700, Steve G4HTZ via Groups.Io wrote:
So the G8JVM voodoo dolls complete with 10 pins being sold at martelsham do work then 😀
-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: for anyone with prosistel rotators

Richard <richard@...>
 


Dissapointing they were being sold, I would have thought the east coast mafia would have given them away.

But I guess they need to keep their funds up someway

Richard
DOn Sun, 2019-04-21 at 06:18 -0700, Steve G4HTZ via Groups.Io wrote:

So the G8JVM voodoo dolls complete with 10 pins being sold at martelsham do work then 😀
-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


'NYK Boards From Martlesham

Andy G4JNT
 

Alan was selling a number of boards and heavy-ish modules at MHM for £10 each (the whole modules).    They were believed to be "... from some sort of test set ..." and had lots of ICs and RF components on the three main PCBs.

I've now dismantled mine and with the aid of a hot air gun and removed the ICs I reckon are worth keeping for the junk box - ie. those that are immediately identifiable  and cost more than a few pence from Farnell

The ones salvaged ware :
2 x  AD9850 DDS  - we all know what that one does
10x AD847  50MHz bandwidth single opamp
4x  AD823A  17MHz B/W dual opamp
lots of Hittite H284 SPDT 0 - 4GHz switches
a few other assorted multiway Hittite RF switches 
2x   ADF4113    4GHz synthesizer
ADF4001   Clock synchroniser / synthesizer
MACOM AT-260 digital attenuator 0 - 31dB   0 - 2GHz
AD7890   8 channel 12 bit A/D data acquisition chip  
Vectron 10MHz TCXO
Various  l Z-COMM VCO modules in the 700 - 2000MHz range
Helical filters and ceramic filters in all the mobile phone bands 

Other components like small RF gain blocks I didn't bother with as identification was uncertain, and they are cheap enough anyway - but there were quintillions of them to be had if you are that keen.   Also quite a lot of diode mixers (DBMs),  but I have loads anyway so not worth the effort

He still had plenty of boards when I left, so unless they have now gone in a skip - you know where to go.
Unfortunately, many of the devices are listed as obsolete, so no use for projects that are to be reproduced by others - but useful to have if you're doing a one-off


Possible Personal Beacons in Coventry

Iain Young
 

Hi Folks,

With several purchases of Eshail'2 related SDR's and associated gubbins,
with a little more outlay, I may have enough exciters, amplifiers, and
antennas for some (personal) beacons in Coventry (IO92fj) on 2.4, 3.4
and 5.6GHz. 1.3GHz is also possible, having done a FM Beacon from the
roof top and heard it the other side of Cov (~4-5 miles) in the past.

Before I go ahead and get the remaining bits for each band, I thought
I would gauge the interest here (and other places). My location has
a hill towards the North East/Leicester, but reasonably clear takeoff
150-330 degrees (The City Centre is at 150 degrees from me or there
abouts, 2 miles distant)

Height is likely to only be 5-8 metres AGL, and most likely they will
be omni antennas, so ~10dBi gain.

Would they be of use to anyone but me ?


73s

Iain


Re: for anyone with prosistel rotators

Steve G4HTZ
 

So the G8JVM voodoo dolls complete with 10 pins being sold at martelsham do work then 😀


for anyone with prosistel rotators

Richard <richard@...>
 

There will definately be a big lift as my tower is tilted over
while I change the 10K pot in the prosistel rotators.
Big problem is ingression of water in to the pot from the top.
But I think I may have found a solution.

The tester paint pots available from most DIY stores are are just the
right diameter to make an umbrella , so anything that drips trough no
longer runs down the shaft of the pot.
Just drill a 5mm hole in the centre of the top and its just the right
size . 5mm gives an interference fit in the plastic on a 6mm shaft.

Time will tell if I'm correct, Another reason for a enhanced
proagartion warning is I fell off the ladder and have hurt my ribs, so
the job won't get finished today, that will no doubt please the sad
brigade who inhabit this list.
--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
######################################################################


Aeroflex 7100

Paul G8AQA
 

I have not been successful finding manuals online. Does anyone have any links?

Paul G8AQA


Good tropo nGB3EDN loud in Gothenburg

Brian Flynn GM8BJF
 

This is to advise you that GB3EDN on 1296MHz has been spotted on 2019-04-20

It was spotted on 1296.9900MHz at 18:17 UTC by SM6VTZ locator JO58UJ27 distance 940km. 

Comment:- jo58uj<tr>io85jv 579 n 0.

This email notification can be switched off in the Beaconkeeper Centre on the Home page. 

73 from Admin - beaconspot.uk 

73s Brian GM8BJF


Re: Aeroflex 7100

Dave G8KHU
 

Thanks Andy


Re: Aeroflex 7100

Richard <richard@...>
 

Groups.io dosn't mask the originators address with me
Roger's is listed as
Just change the "=" to an "@" and ignore all after the "@" which gives g8cub@...

HTH
Richard

On Sat, 2019-04-20 at 15:11 +0100, Phil M0VSE via Groups.Io wrote:
Hi roger

Groups.io masks your address, can you email me? Phil at M0vse.uk 

Thanks

Phil M0VSE


On 20 Apr 2019, at 15:01, Roger Ray via Groups.Io <g8cub@...> wrote:

Phil, email me directly if you will
Roger


On 20 Apr 2019, at 14:57, Phil M0VSE via Groups.Io <phil@...> wrote:

Hi Roger

I would be interested in having the possibly faulty one, what are you looking for it?

73 Phil M0VSE


On 20 Apr 2019, at 14:46, Roger Ray via Groups.Io <g8cub@...> wrote:

Dave - The only one I have left, does not boot into 7100 mode, it gets stuck in windows. So unless someone would like to try and fix it, they are all sold, or spoken for.
Sorry
Roger
G8CUB


On 20 Apr 2019, at 14:17, Andy G4JNT <andy.g4jnt@...> wrote:

Roger, G8CUB, and I think they all went



On Sat, 20 Apr 2019 at 13:47, Dave G8KHU <david@...> wrote:

Andy, Paul et al

 

Do you remember who was selling them and if they have any left

 

Hopefully ;)

Dave

-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: [gm13] Mag Grids For G0EHV

Eddie G0EHV
 

Hi Julian and all,
Thanks for info.
Mine is a Vesuvius Slimline VS24QLPDG24.
Wideband version 2150 – 2700 MHz with gain of 24 dBi.
Uses a quasi log periodic feed which I think was a reasonable match at 2320.
Going to try it against the Tonna next week.
Regards,
Eddie
G0EHV
 

From: Julian - M0UGA
Sent: Saturday, April 20, 2019 3:30 PM
To: gm13@groups.io
Subject: [gm13] Mag Grids For G0EHV
 

Hello Eddie if you're out there..

I see you've been asking about Magnesium Grid antennas elsewhere so I have posted some pictures of mine in the photos section and the work done with them.

I've used these professionally in the past and have always taken an interest in them so it's what I chose to use on 13cms, with fair success I think.

It's interesting to note that Andrew Corp used to have a product line that included variations of these, one for 2.4-2.5Ghz and another wide band one for 2.1-2.7Ghz and I suspect it's the latter that ended up in a Chinese clone factory at some point as mine was bought as a TP-Link and when tested the resonant bandwidth oddly enough was 2.1-2.7Ghz.

I've dropped the Andrew .pdf in the files section.

I rebuilt mine with a 2320 (specifically tuned) dipole and also (with a spare second feed arm) with a WA5VJB LP feed for 3 band coverage of 13/9/6cms. The tuned dipole feed definitely provided an improved match over the shall we say.. mass produced factory item.

It was with the LP feed that I managed to work Jon GM4JTJ a few weeks back with precisely 36w using airscatter thanks to Jon's AS prowess :-)

Are they better than a Tonna 25ele? Maybe is the easy answer, but if nothing else at least there's a readily accessible alternative to the Tonna in an emergency.

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