Date   

Re: UK Microwave OPs - Digest #182

Graham G3VKV
 

Hello Chris,
I expect you worked these two using their JVL's from Cleeve Common way back
Roy G3FYX and Tim G3KEU - used to take my kit out with them many times in the 80's
Pictures not very good as they came from an early colour video (now deteriorated with storage)
Note the flask and easy chair - portable in style !!
73
Graham G3VKV


Re: UK Microwave OPs - Digest #182

Chris Bartram G4DGU
 

Hello Adrian,

Thanks for posting the photos of the 'MTG transverter. I was very happy to have worked that back in the 1980s when Richard was using it with his 1W TWT - serious QRO at that time! I was using a barefoot WG transverter of my own design, still using the same basic principles as the 'JVL, but with much with simpler-to-align filters. Mine still exists, and although the supporting electronics is still extant, it has been spread over a number of later projects.

Incidentally, my best DX with the barefoot WG transverter with about 0.5mW o/p was about 250km, from Bursdon Moor on the Devon-Cornwall border, near the small town of Hartland, to 'JVL on Hayling Island.

73

Chris G4DGU


G3JVL 10 GHz Transceiver

Adrian G4UVZ
 

Attached are pictures of the Classic G3JVL 10 GHz transceiver, built by the late G3MTG.

I have tested it on rx and it receives the local 10 GHz beacon on open guide.

It was obviously a labour of love project which most of us tried at the time and Richard succeeded in getting it working and in deed worked several noteable stations who still frequent these pages.

I am offering it FREE OF CHARGE to any interested party ..I donation towards the running costs of GB3KBQ would however be appreciated.

Please PM  if interested


Re: URL for the 23cm issue

Robin Szemeti - G1YFG
 

As the EU declined to give us access to Galileo, hopefully our powers-that-be will just tell them to do one if they ask for UK amateurs to quit the band.

On Sun, 18 Apr 2021 at 12:47, Denis Stanton G0OLX <Stantondenis@...> wrote:
Barry
Thanks for the link
The blue on blue made it very difficult to read and was not clear in a photo of the presentation.
Thanks for all you do keeping our bands available !!!!
Best 73

Denis G0OLX


On 18 Apr 2021, at 12:11, Algenon M0JIO <alg_edwards@...> wrote:


Hi Barry

I found your talk both informative and encouraging. Being new to the group (and having just purchased some 23cm equipment), I wondered if I should leave it in the box. But knowing how long these committees take to arrive at decisions, I feel confident we shall be able to enjoy this band for some time to come. 

73

Alan
M0JIO

On Sun, 18 Apr 2021, at 11:25, Barry Lewis via groups.io wrote:
Folks,
I saw the request for the hyperlink on the 23cm band slide during the post AGM discussion in the chat but coukldn't respond in time:.

 
Hopefully that works...

73
Barry G4SJH

Regards,

Alan. 


--
Robin Szemeti - G1YFG


Re: URL for the 23cm issue

Denis Stanton G0OLX
 

Barry
Thanks for the link
The blue on blue made it very difficult to read and was not clear in a photo of the presentation.
Thanks for all you do keeping our bands available !!!!
Best 73

Denis G0OLX


On 18 Apr 2021, at 12:11, Algenon M0JIO <alg_edwards@...> wrote:


Hi Barry

I found your talk both informative and encouraging. Being new to the group (and having just purchased some 23cm equipment), I wondered if I should leave it in the box. But knowing how long these committees take to arrive at decisions, I feel confident we shall be able to enjoy this band for some time to come. 

73

Alan
M0JIO

On Sun, 18 Apr 2021, at 11:25, Barry Lewis via groups.io wrote:
Folks,
I saw the request for the hyperlink on the 23cm band slide during the post AGM discussion in the chat but coukldn't respond in time:.

 
Hopefully that works...

73
Barry G4SJH

Regards,

Alan. 


Re: MKU13 G3 lock indicator

Conrad, PA5Y
 

Hello Pete, yes that is exactly what I was looking for. Thanks very much.

 

73

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of Pete G4HQX via groups.io
Sent: 17 April 2021 22:28
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] MKU13 G3 lock indicator

 

This was for the 10GHz G3 - maybe the same as yours

Pete G4HQX


Re: URL for the 23cm issue

Algenon M0JIO
 

Hi Barry

I found your talk both informative and encouraging. Being new to the group (and having just purchased some 23cm equipment), I wondered if I should leave it in the box. But knowing how long these committees take to arrive at decisions, I feel confident we shall be able to enjoy this band for some time to come. 

73

Alan
M0JIO

On Sun, 18 Apr 2021, at 11:25, Barry Lewis via groups.io wrote:
Folks,
I saw the request for the hyperlink on the 23cm band slide during the post AGM discussion in the chat but coukldn't respond in time:.

 
Hopefully that works...

73
Barry G4SJH

Regards,

Alan. 


URL for the 23cm issue

Barry Lewis
 

Folks,
I saw the request for the hyperlink on the 23cm band slide during the post AGM discussion in the chat but coukldn't respond in time:.
 
Hopefully that works...

73
Barry G4SJH


Re: MKU13 G3 lock indicator

Pete G4HQX
 

This was for the 10GHz G3 - maybe the same as yours

Pete G4HQX


MKU13 G3 lock indicator

Conrad, PA5Y
 

I am putting my Kuhne MKU13 G3 into a Shubert enclosure and I would like to have front panel indication that the synth is locked when I have an external source. On one corner of the synth daughter board there are 2 pads one of which I believe is for that application. I remember reading that there are 2 variants of the synth, I expect that this is the latest one because the transverter is only one year old. Does anyone have any details on how to do this? I am sure that there was an application note but I cannot find it on the Kuhne site.

 

Regards

 

Conrad PA5Y


UK Microwave Group AGM Sunday 18 April 10:00AM

John Quarmby
 

Just a reminder that the UK Microwave Group AGM takes place tomorrow, 18th April, at 10:00AM.

Details of the Zoom call were included on page 5 of the March 2021 edition of Scatterpoint. Members can access this in the files section of the Scatterpoint io group:

https://groups.io/g/Scatterpoint/files/SP2103-A4.pdf

73

John G3XDY
Secretary, UK Microwave Group



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


RadCom June GHz Bands

g4bao
 

I will be writing the June GHz Bands column early next week and the good news is that I have two pages again!

My deadline is close of play Thursday, so please send me any news, activity, Details of notable DX worked technical snippets, photos of your latest kit, or ideas  that you have by Tuesday.
Anything that won't fit in the column should find a space in the next Activity column in the UKuG Scatterpoint e-magazine.

73
John

 


Re: tilt angle of TVRO dishes terrestrial 13cm use

Pete - GM4BYF
 

Yes good advice from Dave. It works. Also means the centre of mass is closer to the supporting pole.  Best dx from home (Io85) is IO91 on 13cm.  I also do the same on 3cm. If using a waveguide feed, remember that horizontal polarisation is with the narrow part of the waveguide is horizontal - i.e.. like this  █

73
Pete GM4BYF

On 16/04/21 20:58, Dave (G1OGY) wrote:
On Wed, 14 Apr 2021 at 22:51, G0FVI via groups.io
<Andrew.gilfillan=ntlworld.com@groups.io> wrote:
Quick (and possibly daft!) question (still learning as far as uwaves go). Going to venture out /P for first time soon on 13cm terrestrial. I will be trying an 85cm offset TVRO dish which I have used to demo AO100 at local clubs. I take it for terrestrial use the dish needs to tilted downwards from zero degrees? (it has the tilt bracket marked in degrees on rear and can be reverse mounted to allow downward tilt).
Hello Andy

FWIW I recommend mounting the dish "horizontally".
With a round off-set dish you should find that your `bore-sight` is
parallel to the feed arm of the dish.

When we can get out (!!), M1CRO/P use a PF dish on 13 (and 9) but on 6
and 3cm a 90cm (old, round) `Sky` offset dish is used; mounted
horizontally.
We don't need to mess about with dish tilt angles. You will need to
ensure your feed is correctly orientated for horizontal polarization.
but it won't matter how the dish `tilt` mechanism is set up.

We assemble with the arm vertically straight down at the rotator
setting (whatever the luffed tower direction is) using a level or
plumb-line and merely peak the dish on the beacon when upright. If you
are using a standard rotator (as we do) you will not get better than
+/- 3 degrees accuracy anyhow.
Simple matter then, if necessary, of altering the pointer on the
controller a little to align it up.
OK. We have a couple of local beacons; which helps.

I think that our results show that on those higher bands - with
narrower beamwidths - `it works`.
I expect you'll find the same on 13cm.

Dave, G1OGY



--
vry 73
Pete GM4BYF


Re: tilt angle of TVRO dishes terrestrial 13cm use

Dave (G1OGY)
 

On Wed, 14 Apr 2021 at 22:51, G0FVI via groups.io
<Andrew.gilfillan=ntlworld.com@groups.io> wrote:

Quick (and possibly daft!) question (still learning as far as uwaves go). Going to venture out /P for first time soon on 13cm terrestrial. I will be trying an 85cm offset TVRO dish which I have used to demo AO100 at local clubs. I take it for terrestrial use the dish needs to tilted downwards from zero degrees? (it has the tilt bracket marked in degrees on rear and can be reverse mounted to allow downward tilt).

Hello Andy

FWIW I recommend mounting the dish "horizontally".
With a round off-set dish you should find that your `bore-sight` is
parallel to the feed arm of the dish.

When we can get out (!!), M1CRO/P use a PF dish on 13 (and 9) but on 6
and 3cm a 90cm (old, round) `Sky` offset dish is used; mounted
horizontally.
We don't need to mess about with dish tilt angles. You will need to
ensure your feed is correctly orientated for horizontal polarization.
but it won't matter how the dish `tilt` mechanism is set up.

We assemble with the arm vertically straight down at the rotator
setting (whatever the luffed tower direction is) using a level or
plumb-line and merely peak the dish on the beacon when upright. If you
are using a standard rotator (as we do) you will not get better than
+/- 3 degrees accuracy anyhow.
Simple matter then, if necessary, of altering the pointer on the
controller a little to align it up.
OK. We have a couple of local beacons; which helps.

I think that our results show that on those higher bands - with
narrower beamwidths - `it works`.
I expect you'll find the same on 13cm.

Dave, G1OGY


Re: Anglian/Iceni boxes

Alan Melia
 

Hi John Paypal is the best option for me, send to this emal address and please remember to remind me of your full postal address for delivery. See

https://g3nyk.ham-radio-op.net/componen.htm

for other useful 'bits' .....the postage charge will cover up to 2kg :-))

Alan

----- Original Message -----
From: "john nichols via groups.io" <John1nichols=icloud.com@groups.io>
To: <UKMicrowaves@groups.io>
Sent: Thursday, April 15, 2021 9:24 PM
Subject: Re: [UKMicrowaves] Anglian/Iceni boxes


Hi Alan

I would be very keen to have a box please. I was able to get a PCB from Sam.
I have not contacted you before and so if others are ahead of me in the queue then obviously they come first.

If one is available? How would you like me to pay etc?

73
John
M0JZN

Sent from John's iPhone

On 15 Apr 2021, at 8:46 pm, Alan Melia via groups.io <Alan.Melia=btinternet.com@groups.io> wrote:

Hi all, apologies for the blatent Ad (well not really but it don't cost nuttin' to say :-)) )

I have received a number of enquires from builders who have Anglia or Iceni pcbs from Sam's ''sweepings''. I never stocked these for general sale but bought in with my other purchases just for Sam. I have now gritted my teeth for the first tussle with the new VAT import system and have a number of these boxes surplus after supplying those who made earlier queries.If you did enquire ''long ago'' and I have not already contacted you with a price, please contact me anew.

The price is £5.00 each and £3.60 postage

You know its better than a 9600 and cheaper :-))

Alan
G3NYK
alan (dot) melia (at) btinternet (dot) com





Re: Anglian/Iceni boxes

john nichols
 

Hi Alan

I would be very keen to have a box please. I was able to get a PCB from Sam.
I have not contacted you before and so if others are ahead of me in the queue then obviously they come first.

If one is available? How would you like me to pay etc?

73
John
M0JZN

Sent from John's iPhone

On 15 Apr 2021, at 8:46 pm, Alan Melia via groups.io <Alan.Melia=btinternet.com@groups.io> wrote:

Hi all, apologies for the blatent Ad (well not really but it don't cost nuttin' to say :-)) )

I have received a number of enquires from builders who have Anglia or Iceni pcbs from Sam's ''sweepings''. I never stocked these for general sale but bought in with my other purchases just for Sam. I have now gritted my teeth for the first tussle with the new VAT import system and have a number of these boxes surplus after supplying those who made earlier queries.If you did enquire ''long ago'' and I have not already contacted you with a price, please contact me anew.

The price is £5.00 each and £3.60 postage

You know its better than a 9600 and cheaper :-))

Alan
G3NYK
alan (dot) melia (at) btinternet (dot) com





Anglian/Iceni boxes

Alan Melia
 

Hi all, apologies for the blatent Ad (well not really but it don't cost nuttin' to say :-)) )

I have received a number of enquires from builders who have Anglia or Iceni pcbs from Sam's ''sweepings''. I never stocked these for general sale but bought in with my other purchases just for Sam. I have now gritted my teeth for the first tussle with the new VAT import system and have a number of these boxes surplus after supplying those who made earlier queries.If you did enquire ''long ago'' and I have not already contacted you with a price, please contact me anew.

The price is £5.00 each and £3.60 postage

You know its better than a 9600 and cheaper :-))

Alan
G3NYK
alan (dot) melia (at) btinternet (dot) com


Re: tilt angle of TVRO dishes terrestrial 13cm use

Nicholas Shaxted
 

Both of my Kathrein dishes (75cm and 95cm)  have a mounting bracket marked in 1 deg intervals. The minimum elevation angle is 5 (five) degrees. In both cases I milled out the slot to included 0 (zero) degrees actually a little less. This eased setting up on the mast as its stub mast could be vertical and the dish moved to point horizontal. From memory Central/Northern Europe dishes are built for a 22.6 deg offset, but that should not worry you too much 😉 as all you really need to do is look for the rise in noise and raise the dish until that noise has reduced by around 3dB. That should give you a good starting point. Beamwidth which will be of the order of about 10 degs for 3dB points at 13cm should mean you do not have to point the dish down as such.

 

Take an indelible ink marker pen with you and once you have confidence in your set up clearly mark some key reference points on the mount and tripod

If you only take a mobile phone image you will forget what it shows by the time you next get out.

 

 

Nick – g4ogi

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of G0FVI via groups.io
Sent: 14 April 2021 21:52
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] tilt angle of TVRO dishes terrestrial 13cm use

 

Quick (and possibly daft!) question (still learning as far as uwaves go). Going to venture out /P for first time soon on 13cm terrestrial. I will be trying an 85cm offset TVRO dish which I have used to demo AO100 at local clubs.  I take it for terrestrial use the dish needs to tilted downwards from zero degrees? (it has the tilt bracket marked in degrees on rear and can be reverse mounted to allow downward tilt). 

TNX
Andy G0FVI


Re: tilt angle of TVRO dishes terrestrial 13cm use

on4cjq@...
 

Andy

I have 2 TRIAX dishes, a 85w*95h offset and with inclinometer on lnb-support arm i have -21° down, with the TRIAX 60w*65h i must have -23°. The tilt bracket on the back can't be used in both mounting positions with it's degrees when mounted on a vertical pole because it doesn' go low enough.
I mounted an alu plate on the bracket with 2 tubeclamps to use it on a horizontal round 42mm tube.

73's Jerry


Van: "G0FVI via groups.io" <Andrew.gilfillan@...>
Aan: "UKMicrowaves" <UKMicrowaves@groups.io>
Verzonden: Woensdag 14 april 2021 23:51:33
Onderwerp: [UKMicrowaves] tilt angle of TVRO dishes terrestrial 13cm use

Quick (and possibly daft!) question (still learning as far as uwaves go). Going to venture out /P for first time soon on 13cm terrestrial. I will be trying an 85cm offset TVRO dish which I have used to demo AO100 at local clubs.  I take it for terrestrial use the dish needs to tilted downwards from zero degrees? (it has the tilt bracket marked in degrees on rear and can be reverse mounted to allow downward tilt). 

TNX
Andy G0FVI


Re: ic9700?

Mike GD6ICR
 

Dont criticize the original MML100 (the one without the pre-amp  and a separate heatsink) really clean 108W with 10W drive from my ancient TS120V and MMTV28-144. Later stuff well I never had any so cant comment. Built by G8HTF usually the better ones with DCF on PCB
--
Mike GD6ICR IO74PF73TW

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