Date   

Re: Second manufacturing run Update #5

Tim - VK2XAX
 

Hi Peter,

A few people have expressed interest in bare boards so I have increased the number available, so you can add to your order now.

regards

Tim


On 8/12/20 6:03 am, VA3ELE Peter wrote:
Hi Tim, 
First off, Thanks for all your hard work on this project, awesome work!
On a secondary note, my original interest had a blank board, but, at the time of payment, none were available. Is there a chance of getting one? Please advise how to proceed. 

73 de Peter 
VA3ELE FN03DM 
-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Re: 122Ghz Waveguide

Neil Smith G4DBN
 

Hi Don, I've tried making 2.00 mm  and 1.80 mm waveguide sections using C109 Tellurium Copper round bar and drilling using a long-series slow helix drill, the reaming the tube to final size.  Two inch sections are very easy. However, the longest section I have made is just under four inches, drilled and reamed from both ends.  The alignment was *ALMOST* good enough, but it is a lot of work for little benefit.  I tested it by pushing a 2.000 mm gauge pin through the hole, and I could feel a small discontinuity.


Modelmaker's steam tube is about the best solution I've found, but the interior finish is not impressive. Perhaps it could be polished using diamond paste or metal polish on some linen thread. The problem is finding tube of the right size to suppress higher-order modes.


Albion Alloys do 3 mm aluminium tube with an ID of 2.1 mm which might  be a good choice if you epoxy a length into an adjustable coupler with a 3mm bore and a slight internal taper. https://www.wonderlandmodels.com/products/albion-alloys-al-tube-3mm/ I guess you might find something similar from US suppliers. They also do brass and copper, but I think the loss in brass might not be acceptable. The copper and aluminium tubes might need a little extra support, perhaps epoxying them in a section of square or round brass/aluminium tube. I would be tempted to fit a slow-tapered end cap with an orifice about 0.8 mm into whatever you are using to feed the splashplate.


I've stopped work on waveguides for now, and I'm making hyperbolic Cassegrain subreflectors and matching horns instead, as that avoids the need for waveguide.  I'm using the Edmund Scientific f/d 0.25 dishes (18 inch and 12 inch) to see if it's possible to get reasonable performance. https://www.edmundoptics.co.uk/f/large-parabolic-reflectors/11483/


I did consider trying a dielguide feed, but the machining precision required and the difficulty of cementing the reflector plate to the end of the Rexolite lens, plus the need for a waveguide run really put me off!


See if you can any suitable tube from US modelmaking suppliers, particularly those dealing with model steam engines.


Neil G4DBN


On 07/12/2020 23:52, Don Woodward wrote:
Has anyone had success in finding any material to use as waveguide?

I purchased a PCOM 30cm 37-40Ghz dish on eBay and would like to make a splash feed for 122Ghz like the one with the dish.


Re: 122Ghz Waveguide

Mike Lavelle K6ML
 

Amazon sells various diameters of brass and copper hobby tubing in metric sizes, usually three 12" long pieces per pack.  You can nest or telescope these tubes.  You want a 2mm ID facing the splash plate and 4mm OD to fit in the VK3CV combiner (just leave out the Chaparral horn that comes with the coupler).  I'm thinking to use brass (for strength) for all but the innermost tube, where I'm thinking of using copper (for lower loss).
 
My dish was a 70-80 GHz dish, so had 3mm ID waveguide, your's is probably a larger ID (for 39 GHz).   In my case, I use a length of 3mm OD/2mm ID tubing all the way out to the splash feed point, with a short length of 4mmOD/3mmID as a collar on the combiner end.   
                                                                                    |
                                                                                    |
                                                                                    |
combiner                                                                     |
4 OD 4 4 4          ---original wg-----------------                |
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3                |
                                                                                    |  splash
3 OD 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3                |
4 OD 4 4 4          ---original wg-----------------                |
combiner                                                                     |
                                                                                    |
                                                                                    |
                                                                                    |
 
 
 
If, for example, your dish's WG ID is 6mm ( a guess... the freq is half mine, you should measure it), then you would telescope 6mm OD/5mm ID on top of 5mmOD/4ID for the length of the dish's waveguide and inside that a longer section of 4mm OD/3mmID over 3mm OD/2mm ID.  The extra length would fit inside the VK3CV combiner.
 
                                                                                    |
                           ---- original wg --------------                |
                      6 OD 666666666666666666                |
combiner       5 OD 555555555555555555                |
4 OD 44444444444444444444444444444                |
3 OD 33333333333333333333333333333                |
                                                                                    |  splash
3 OD 33333333333333333333333333333                |
4 OD 44444444444444444444444444444                |
combiner       5 OD 555555555555555555                |
                      6 OD 666666666666666666                |
                           ---- original wg --------------                |
                                                                                    |
 
Mike K6ML
 
Amazon also sells some collars and bushings for RC cars that have metric dimensions and can be used as fasteners/position sops/mounting flanges for the tubing.

On 12/07/2020 3:52 PM Don Woodward <dbwoodw@...> wrote:
 
 
Has anyone had success in finding any material to use as waveguide?
 
I purchased a PCOM 30cm 37-40Ghz dish on eBay and would like to make a splash feed for 122Ghz like the one with the dish.
 
 
73's
 
Don W.
KD4APP
EM84au
 


122Ghz Waveguide

Don Woodward
 

Has anyone had success in finding any material to use as waveguide?

I purchased a PCOM 30cm 37-40Ghz dish on eBay and would like to make a splash feed for 122Ghz like the one with the dish.



73's

Don W.
KD4APP
EM84au



last minute join in?

Rene PE9R X
 

hey Tim,

I believe it is still an option to join this project.correct?
I have done some reading on the fund razer project.
Can you fill me in on the list?

Best 73, René PE9RX


Re: VK3CV 122 board status display

Don Woodward
 

Brilliant work and very easy to read code.

73's

Don W.
KD4APP
EM84au



From: The122GProject@groups.io <The122GProject@groups.io> on behalf of Barry Chambers via groups.io <b.chambers@...>
Sent: Monday, December 7, 2020 9:06 AM
To: The122GProject@groups.io <The122GProject@groups.io>
Subject: Re: [The122GProject] VK3CV 122 board status display
 

Hi Zak

see attached

73 Barry, G8AGN



On 07/12/2020 13:44, Zack Widup wrote:
Hi Barry,

Is the code for the Arduino available?

73, Zack W9SZ

Virus-free. www.avast.com

On Mon, Dec 7, 2020 at 2:37 AM Barry Chambers <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN
-- 
73
Barry, G8AGN


Re: Second manufacturing run Update #5

VA3ELE Peter
 

Hi Tim, 
First off, Thanks for all your hard work on this project, awesome work!
On a secondary note, my original interest had a blank board, but, at the time of payment, none were available. Is there a chance of getting one? Please advise how to proceed. 

73 de Peter 
VA3ELE FN03DM 


Re: VK3CV 122 board status display

 

Thanks Barry!

73, Zack W9SZ


On Mon, Dec 7, 2020 at 8:06 AM Barry Chambers <b.chambers@...> wrote:

Hi Zak

see attached

73 Barry, G8AGN



On 07/12/2020 13:44, Zack Widup wrote:
Hi Barry,

Is the code for the Arduino available?

73, Zack W9SZ

Virus-free. www.avast.com

On Mon, Dec 7, 2020 at 2:37 AM Barry Chambers <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN
-- 
73
Barry, G8AGN


Re: VK3CV 122 board status display

Barry Chambers
 

Hi Zak

see attached

73 Barry, G8AGN



On 07/12/2020 13:44, Zack Widup wrote:
Hi Barry,

Is the code for the Arduino available?

73, Zack W9SZ

Virus-free. www.avast.com

On Mon, Dec 7, 2020 at 2:37 AM Barry Chambers <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN
-- 
73
Barry, G8AGN


Re: VK3CV 122 board status display

 

Hi Barry,

Is the code for the Arduino available?

73, Zack W9SZ

Virus-free. www.avast.com


On Mon, Dec 7, 2020 at 2:37 AM Barry Chambers <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN


Re: VK3CV 122 board status display

G1BVI-Nick
 

Thanks Barry
Will do that next year.
I ordered two boards so I can do local testing talking to my self hi hi.
No idea of an enclosure yet but will include your display on each me thinks 😉 

73
Nick

On Mon, 7 Dec 2020, 08:49 Barry Chambers, <b.chambers@...> wrote:

Hi Nick

at least 5 have been built as beta testers in the UK so far. Ask me for the sketch when you want to build one.

The article in SP seems to have got a bit ammended as there should also have been a photo of the mounted board.

73 Barry, G8AGN


On 07/12/2020 08:44, G1BVI wrote:
Hi Barry
Saw that in Scatterpoint and wondered how you had mounted it etc..... these are the missing images.
It looks a very interesting  addition. 

Hioe to get my 122 next year..
I am sure this will be a popular add on

73

Nick

On Mon, 7 Dec 2020, 08:37 Barry Chambers, <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN
-- 
73
Barry, G8AGN


Re: VK3CV 122 board status display

Barry Chambers
 

Hi Nick

at least 5 have been built as beta testers in the UK so far. Ask me for the sketch when you want to build one.

The article in SP seems to have got a bit ammended as there should also have been a photo of the mounted board.

73 Barry, G8AGN


On 07/12/2020 08:44, G1BVI wrote:
Hi Barry
Saw that in Scatterpoint and wondered how you had mounted it etc..... these are the missing images.
It looks a very interesting  addition. 

Hioe to get my 122 next year..
I am sure this will be a popular add on

73

Nick

On Mon, 7 Dec 2020, 08:37 Barry Chambers, <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN
-- 
73
Barry, G8AGN


Re: VK3CV 122 board status display

G1BVI-Nick
 

Hi Barry
Saw that in Scatterpoint and wondered how you had mounted it etc..... these are the missing images.
It looks a very interesting  addition. 

Hioe to get my 122 next year..
I am sure this will be a popular add on

73

Nick

On Mon, 7 Dec 2020, 08:37 Barry Chambers, <b.chambers@...> wrote:
I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN


VK3CV 122 board status display

Barry Chambers
 

I have developed a status display for the 122 GHz board. It is based on an Arduino Pro-Mini and looks at the state of the CH A/B, PTT, KEY and channel switches. This information is then displayed on a 160x128 TFT colour display, together with the 122 Board's transmit or receive mode. and frequencies. If  wanted, the display can also use the output from the 122 board's GPS module to display the time and your 10 figure Maidenhead locator. See photos and schematic attached.

73  Barry, G8AGN


Re: Second manufacturing run Update #5

Tim - VK2XAX
 

I also just realised that people may have lost the link to the Fundrazr page so here it is :)

https://fundrazr.com/122GHzProjectrun2?ref=ab_b8aPL4

regards

Tim


--
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Second manufacturing run Update #5

Tim - VK2XAX
 

Hi all,

I've spent 1/2 the day reconciling the Fundrazr transactions against the interest list.

I've updated the interest list with those who have paid...

http://tiny.cc/7jvmsz

If you have paid but its not showing on the list, please email me direct at VK2XAX@skybase.net instead of responding to this list.


According to the FR transaction list, I have an additional 25 people who have bought things but are _NOT_ on my interest list!

This has caused me some level of trepidation since this has skewed the ordering  and my tracking.

Additionally quite a few people have varied their orders both up and down just to make things interesting!

I'll update the tracking sheet with the additional people and the order variances soon.


If you are one of those who did register your interest but have not yet paid up please do so soon.

The Fundrazr campaign only has 12 days left to run,and I'd really like to be able to place the order with the manufacturers after that.


I will also be emailing a reminder to those who haven't paid directly

regards

Tim


--
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Re: Update #2 - Fundrazr campaign is now live.

Tim - VK2XAX
 

Hi Ben,

Probably not, you best path for action would be to contact Fundrazr with your question.

regards

Tim


On 3/12/20 6:40 am, militaryoperator via groups.io wrote:

What about this "donation" problem? 

Is there a way of getting this back from this site? 

Ben 



-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Re: Update #2 - Fundrazr campaign is now live.

militaryoperator
 


What about this "donation" problem? 

Is there a way of getting this back from this site? 

Ben 


-----Original Message-----
From: Tim - VK2XAX <VK2XAX@...>
To: The122GProject@groups.io
Sent: Wed, 2 Dec 2020 8:07
Subject: Re: [The122GProject] Second manufacturing run Update #2 - Fundrazr campaign is now live.

Hi Steen,
Yes, its OK. I've had a few people come in late and one or two drop out so it will all be good in the end.
This weekend I hope to email all those who haven't paid to see if they are still interested and hopefully we'll reach target soon after that :)
cheers
Tim
On 1/12/20 10:29 pm, Steen Erik Hansen wrote:
Hi Tim
Is it ok that I order a made board, even I have not signed up on the pre list

73 LA5GOA Steen Erik




4. nov. 2020 kl. 02:08 skrev Tim - VK2XAX <VK2XAX@...>:

Hi all,

To everyone who has ended up on the second round list...

the Fundrazr site to collect funds for the second round of manufacturing is now live here...

https://fundrazr.com/122GHzProjectrun2

The cost of the made board has increased slightly from last time to $144USD

The cost of the horn antennas has remained the same.

Please read everything I have written on the intro page. I've even written an FAQ

Hopefully it will answer all your questions.

You can place & pay for your orders via the campaign web site.

Hopefully we can hit our target quickly and get the actual manufacturing under way.


regards

Tim

--
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA







-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Re: Second manufacturing run Update #2 - Fundrazr campaign is now live.

Tim - VK2XAX
 

Hi Steen,

Yes, its OK. I've had a few people come in late and one or two drop out so it will all be good in the end.

This weekend I hope to email all those who haven't paid to see if they are still interested and hopefully we'll reach target soon after that :)

cheers

Tim

On 1/12/20 10:29 pm, Steen Erik Hansen wrote:

Hi Tim

Is it ok that I order a made board, even I have not signed up on the pre list


73 LA5GOA Steen Erik




4. nov. 2020 kl. 02:08 skrev Tim - VK2XAX <VK2XAX@...>:

Hi all,

To everyone who has ended up on the second round list...

the Fundrazr site to collect funds for the second round of manufacturing is now live here...

https://fundrazr.com/122GHzProjectrun2

The cost of the made board has increased slightly from last time to $144USD

The cost of the horn antennas has remained the same.

Please read everything I have written on the intro page. I've even written an FAQ

Hopefully it will answer all your questions.

You can place & pay for your orders via the campaign web site.

Hopefully we can hit our target quickly and get the actual manufacturing under way.


regards

Tim

--
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA







-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Re: Tracking sheet

Tim - VK2XAX
 

Hi Göran,

Thanks for the offer, but I am good. I will update the sheet this weekend.

The day job has kept me pretty busy this last month or so but I'm on top of it now and have a bit more free time to address the paper work.

regards

Tim

On 1/12/20 7:58 pm, Göran Björk SM0IKR wrote:
Hi Tim.
I see that the tracking sheet is not so very up to date.
If you want some help with that i have the time.
vy 73 George SM0IKR
--
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA

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