Date   

Re: VK3CV 30THz full system demonstration.

Barry Chambers
 

John

yes it is. Modulation is via putting an opaque screen between the hot plate and the Rx; hence my reference before to QRSS

73 Barry, G8AGN


On 07/01/2021 16:13, g4bao wrote:
No info on what his TX is?
Surely it's not just a hot copper plate is it?
If so I don't understand!

Anyone elucidate?

73
John
 
-- 
73
Barry, G8AGN


75th Annivesary of Project Diana

Brian Flynn GM8BJF
 

This was on the SBMS reflector and migh be of interest to people here.

73s
Brian GM8BJF

____________________________________________________
From: Al Katz <alkatz@...>
Date: Wed, Jan 6, 2021 at 8:01 PM
Subject: FW: 75th Anniversary of Project Diana's Moon-Bounce
To: Al Katz <a.katz@...>


I do not mean to send you SPAM, but I thought this would be of interest
enough to do a special mailing.  All times are in EST.



73, Al, K2UYH



*The InfoAge Space Exploration Center*

*PRESENTS*



*A** FREE** ONLINE LIVE ZOOM Event*

Zoom Meeting ID: *972 2218 5664*

Attend All Events or Your Choice

*January 10, 2021-10:00 am - 4:00 pm*



*THE 75th Anniversary  *

*Of The*

*PROJECT DIANA MOON-BOUNCE!*



*Hear The First Radio Signal Received on the Earth from Above the
Ionosphere!*



*Newly Discovered Information by InfoAge Historians about*

*Edwin Armstrong’s Contribution to Project Diana*

*__________*

*10:00 - Lori Lauber - Introduction to Project Diana*



*10:30 - Dr. Daniel Marlow - The TLM 18 *



*11:00 - Ray Chase and Al Klase - Edwin Armstrong*



*11:58 - LIVE MOON-BOUNCE from ISEC!*

*FIRST TIME EVER ZOOM MOONBOUNCE.*

*        Bounce YOUR Voice off the Moon on Zoom.*

*Hear Your Voice Travel 500,000 Miles !*

*12:15 - Cindy Pomerleau Stodola -** Daughter of E. King Stodola*

*                                       Debuting her new book *

*“To The Moon and Back-The Life and Times of Project Diana”*



*1:00 - Fred Carl - **Discoveries after the Moon-Bounce*



*2:00 - Charles Cebula - **The Math of the Moon-Bounce*



*2:30 - Diane Mercedes McAfee - Daughter of Walter McAfee*



*3:00 - Frank O’Brien -** The James Webb Telescope and the
       Future of Radio in Space Exploration* *  ________________*

*Zoom Meeting ID: **972 2218 5664*

*Attend ALL Speaker Events or Choose the ones you are interested in.  It’s
all FREE!*

*_________________________________________________*



*I**nfoAge is a non-profit organization whose mission it is to preserve
Science and History *

*and make it accessible to Everyone. ** Your Donation Keeps us Going. *



*DONATE TODAY at PayPal and be a part of history in the making!*







--
“If you think procrastination is the thief of time, you should try
moonbouncing!”  Ray Naughton VK3ATN, November 1966 QST
R
R
Ray R
R
_______________________________________________
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Re: Scatterpoint and RadCom columns request for input.

Maarten PA0MHE
 

Just send it out today to Roger.......

On Thu, Jan 7, 2021 at 7:50 PM Robin Szemeti - G1YFG <robin@...> wrote:
I'll be happy to write up the 9cm thing if it works ... boards expected ... ooh, tomorrow!  It won't make this month, but it could make next month.  You could ask Maarten PA0MHE if he has something ...


On Thu, 7 Jan 2021 at 18:12, Andy G4JNT <andy.g4jnt@...> wrote:
Just do the sums - use the spreadsheet
You'll be surprised just how low a distance you'll end up with.



On Thu, 7 Jan 2021 at 17:54, Colin Ranson <g8lbs@...> wrote:

Hi Murray,

 

These new EMF regs, does it mean we shall all have to use our QRO amps as doorstops and boat anchors ?  Does it mean QRO terrestrial TV TX’s, eg Sudbury, Sandy Heath, etc will have to go off air ?

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Murray Niman
Sent: 07 January 2021 15:55
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Scatterpoint and RadCom columns request for input.

 

Given the new EMF regs that Ofcom will confirm in a few weeks, you might not want 1W amps  in a 10GHz waveguide for Foundation, but mW and modest horns can still be educational/fun

73

  Murray G6JYB

 


--
Robin Szemeti - G1YFG


Re: Re elevation on a dish

Dave
 

Thanks Neil that is very helpful.
Dave G4GLT.

On 7 Jan 2021, at 18:54, Neil Smith G4DBN <neil@g4dbn.uk> wrote:

I mount the boxes on rails fixed to the moving part of the dish mount, but you can always use a short bit of flexiguide if you are only moving the dish a few degrees and if the angles work out.

Neil G4DBN

On 07/01/2021 18:35, Dave via groups.io wrote:
I suppose that if I use waveguide feed from the dish as I had intended , then that certainly complicates matters as the box with the transverter/ PA etc has to move with the back of the dish.
Dave G4GLT.


On 7 Jan 2021, at 18:21, Dave via groups.io <davidnewman55=icloud.com@groups.io> wrote:
 Thank you very much Neil. The pictures look very comprehensive .
73
Dave G4GLT.



On 7 Jan 2021, at 17:53, Neil Smith G4DBN <neil@g4dbn.uk> wrote:



If you are pushing against the edge of the dish, take care that the dish doesn't get distorted by the actuator when it is windy.

Here is a pic of Tony G8DMU's neat top-fed 1.2m offset, and some things I've fabricated. Elevation control has made a spectacular difference to my station performance on 10 GHz. Being able to elevate enough to take sun noise readings has been useful as well.

Neil G4DBN





Re: Re elevation on a dish

Neil Smith G4DBN
 

I mount the boxes on rails fixed to the moving part of the dish mount, but you can always use a short bit of flexiguide if you are only moving the dish a few degrees and if the angles work out.

Neil G4DBN

On 07/01/2021 18:35, Dave via groups.io wrote:
I suppose that if I use waveguide feed from the dish as I had intended , then that certainly complicates matters as the box with the transverter/ PA etc has to move with the back of the dish.
Dave G4GLT.


On 7 Jan 2021, at 18:21, Dave via groups.io <davidnewman55=icloud.com@groups.io> wrote:

 Thank you very much Neil. The pictures look very comprehensive .
73
Dave G4GLT.



On 7 Jan 2021, at 17:53, Neil Smith G4DBN <neil@g4dbn.uk> wrote:



If you are pushing against the edge of the dish, take care that the dish doesn't get distorted by the actuator when it is windy.

Here is a pic of Tony G8DMU's neat top-fed 1.2m offset, and some things I've fabricated. Elevation control has made a spectacular difference to my station performance on 10 GHz. Being able to elevate enough to take sun noise readings has been useful as well.

Neil G4DBN


Re: Scatterpoint and RadCom columns request for input.

Robin Szemeti - G1YFG
 

I'll be happy to write up the 9cm thing if it works ... boards expected ... ooh, tomorrow!  It won't make this month, but it could make next month.  You could ask Maarten PA0MHE if he has something ...


On Thu, 7 Jan 2021 at 18:12, Andy G4JNT <andy.g4jnt@...> wrote:
Just do the sums - use the spreadsheet
You'll be surprised just how low a distance you'll end up with.



On Thu, 7 Jan 2021 at 17:54, Colin Ranson <g8lbs@...> wrote:

Hi Murray,

 

These new EMF regs, does it mean we shall all have to use our QRO amps as doorstops and boat anchors ?  Does it mean QRO terrestrial TV TX’s, eg Sudbury, Sandy Heath, etc will have to go off air ?

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Murray Niman
Sent: 07 January 2021 15:55
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Scatterpoint and RadCom columns request for input.

 

Given the new EMF regs that Ofcom will confirm in a few weeks, you might not want 1W amps  in a 10GHz waveguide for Foundation, but mW and modest horns can still be educational/fun

73

  Murray G6JYB

 


--
Robin Szemeti - G1YFG


Re: Re elevation on a dish

Dave
 

I suppose that if I use waveguide feed from the dish as I had intended , then that certainly complicates matters as the box with the transverter/ PA etc has to move with the back of the dish. 
Dave G4GLT. 


On 7 Jan 2021, at 18:21, Dave via groups.io <davidnewman55@...> wrote:

Thank you very much Neil. The pictures look very comprehensive .
73
Dave G4GLT. 



On 7 Jan 2021, at 17:53, Neil Smith G4DBN <neil@...> wrote:



If you are pushing against the edge of the dish, take care that the dish doesn't get distorted by the actuator when it is windy.

Here is a pic of Tony G8DMU's neat top-fed 1.2m offset, and some things I've fabricated.  Elevation control has made a spectacular difference to my station performance on 10 GHz. Being able to elevate enough to take sun noise readings has been useful as well.

Neil G4DBN

<decejedmnlegefln.png>

<flpohocpmkijaial.png>

<dbcnliibjoeloibn.png>

<chemhomoebldlkbl.png>


On 07/01/2021 17:02, Dave via groups.io wrote:
Hello,
I am adding elevation on a dish for tropo only (not EME) and wondered if anyone has a photo of the mechanics of it, preferably with some sort of hinge . I have an actuator which has a stroke length of 4 inches. I think the lower part of the dish will have to be pushed outwards. 
73
Dave G4GLT. 


Re: Re elevation on a dish

Neil Smith G4DBN
 

Many dishes come with a tilting mount anyway, you might find it is easy to use bolts, washers and Nyloc nuts plus decent grease to make a solid pivot, then if the dish is stuff, push against it, or if not, fit an arm to the mount and press against that instead. I tend to use stainless steel shafts running in UHMWPE machined bushes as pivots as there is zero slop/backlash and no corrosion/wear issues.

I've found it useful to tilt up a few degrees to use rainscatter off nearby storms, and to follow planes on the glide slope into Doncaster airport at 2-4 degrees up.  Also my eastern horizon is at +0.5 degrees, and when there is ducting over the North Sea, I find that 1 degree of elevation often gets me into the duct over the top of the 600 ft Wolds and over to Helgoland and Denmark when there is almost nil at 0 degrees.

Same when there is a breeze that tilts the mast/dish slightly, I can just raise or lower the dish to compensate and peak things up.

Neil G4DBN


Re: VAT ... it looks like it's going to be difficult.

Robin Szemeti - G1YFG
 

No problem with that, as others have said, there is no place for racism here or anywhere else, but if you are expecting me to refrain from criticising the extensive VAT and customs fraud committed by traders from the Republic of China, I'm afraid you are going to be sadly disappointed.

On Thu, 7 Jan 2021 at 17:13, Wilko <wkb@...> wrote:
Amen to that!

"Politics have no place in ham radio"

Wilko
PA1WBU






--
Robin Szemeti - G1YFG


VK3CV 30THz full system demonstration.

Barry VE4MA
 

I think he refers to it as a number of resistors in the TX 

Barry VE4MA


Re: Re elevation on a dish

Dave
 

Thank you very much Neil. The pictures look very comprehensive .
73
Dave G4GLT. 



On 7 Jan 2021, at 17:53, Neil Smith G4DBN <neil@...> wrote:



If you are pushing against the edge of the dish, take care that the dish doesn't get distorted by the actuator when it is windy.

Here is a pic of Tony G8DMU's neat top-fed 1.2m offset, and some things I've fabricated.  Elevation control has made a spectacular difference to my station performance on 10 GHz. Being able to elevate enough to take sun noise readings has been useful as well.

Neil G4DBN

<decejedmnlegefln.png>

<flpohocpmkijaial.png>

<dbcnliibjoeloibn.png>

<chemhomoebldlkbl.png>


On 07/01/2021 17:02, Dave via groups.io wrote:
Hello,
I am adding elevation on a dish for tropo only (not EME) and wondered if anyone has a photo of the mechanics of it, preferably with some sort of hinge . I have an actuator which has a stroke length of 4 inches. I think the lower part of the dish will have to be pushed outwards. 
73
Dave G4GLT. 


Re: Scatterpoint and RadCom columns request for input.

Andy G4JNT
 

Just do the sums - use the spreadsheet
You'll be surprised just how low a distance you'll end up with.



On Thu, 7 Jan 2021 at 17:54, Colin Ranson <g8lbs@...> wrote:

Hi Murray,

 

These new EMF regs, does it mean we shall all have to use our QRO amps as doorstops and boat anchors ?  Does it mean QRO terrestrial TV TX’s, eg Sudbury, Sandy Heath, etc will have to go off air ?

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Murray Niman
Sent: 07 January 2021 15:55
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Scatterpoint and RadCom columns request for input.

 

Given the new EMF regs that Ofcom will confirm in a few weeks, you might not want 1W amps  in a 10GHz waveguide for Foundation, but mW and modest horns can still be educational/fun

73

  Murray G6JYB

 


Re: Scatterpoint and RadCom columns request for input.

Murray Niman
 

Plenty of EMF guidance will be available to help you with the assessment threshold- it is not an absolute limit, but a statutory rule to avoid high fields near other folk.

RSGB will also be releasing a nicer front end for the somewhat basic Ofcom calculator 

for microwaves it will be a nice reminder on the difference between real power and EIRP due to high antenna gains 
Something amateurs as well as the public often overlook.

73

    Murray


Re: Scatterpoint and RadCom columns request for input.

Colin Ranson
 

Hi Murray,

 

These new EMF regs, does it mean we shall all have to use our QRO amps as doorstops and boat anchors ?  Does it mean QRO terrestrial TV TX’s, eg Sudbury, Sandy Heath, etc will have to go off air ?

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Murray Niman
Sent: 07 January 2021 15:55
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Scatterpoint and RadCom columns request for input.

 

Given the new EMF regs that Ofcom will confirm in a few weeks, you might not want 1W amps  in a 10GHz waveguide for Foundation, but mW and modest horns can still be educational/fun

73

  Murray G6JYB

 


Re: VAT ... it looks like it's going to be difficult.

Wilko
 

Amen to that!

"Politics have no place in ham radio"

Wilko
PA1WBU


Re elevation on a dish

Dave
 

Hello,
I am adding elevation on a dish for tropo only (not EME) and wondered if anyone has a photo of the mechanics of it, preferably with some sort of hinge . I have an actuator which has a stroke length of 4 inches. I think the lower part of the dish will have to be pushed outwards.
73
Dave G4GLT.


Re: Microstrip Filter designer

g4bao
 

Don'tya just hate it when newer versions of software don't support old file formats?

None of my myriad of QUCS .sch files from the past will load in QUCs Studio.


" First we kill all the Software Engineers.......!"

Anyone know if you can convert/import them?

J


Re: VK3CV 30THz full system demonstration.

John Fell
 

If it Quacks and waddles it's a Duck ......

John
G0API

Murray does not seem to know where these 1W 10GHz devices are ?

On Thu, 7 Jan 2021 at 16:26, g4bao <john@...> wrote:
Oh, it is a hot copper plate, isn't it!

I Just looked up the sensor Barry mentioned and I see that it's an infra red thermometer!

Hadn't quite sunk in what 30THz meant, ....Hmm.... but is it radio? (Ducks!)

:-)

J


   


Re: VK3CV 30THz full system demonstration.

g4bao
 

Oh, it is a hot copper plate, isn't it!

I Just looked up the sensor Barry mentioned and I see that it's an infra red thermometer!

Hadn't quite sunk in what 30THz meant, ....Hmm.... but is it radio? (Ducks!)

:-)

J


   


Re: VK3CV 30THz full system demonstration.

g4bao
 

No info on what his TX is?
Surely it's not just a hot copper plate is it?
If so I don't understand!

Anyone elucidate?

73
John
 

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