Date   

Re: PCB fab for SHF laminates with immersion silver plating and solder resist?

Neil Smith G4DBN
 

Mouser list them at £350 delivery and duty paid, so that should include local UK purchase tax. Digikey have no current stock. Verical and Arrow have stock. Not sure of the dollar price, have a look on Octopart or try to beg a sample from Wolfspeed? 

They will need a declaration of use statement and may not ship to some locations (at least that’s what happened with my 025 device).

On 30 Apr 2021, at 00:11, Stefan <comlab@...> wrote:

Neil

How many dollars are those devices?

Stefan
----- Original Message ----- From: "Neil Smith G4DBN" <neil@...>
To: <UKMicrowaves@groups.io>
Sent: Friday, April 30, 2021 8:40 AM
Subject: Re: [UKMicrowaves] PCB fab for SHF laminates with immersion silver plating and solder resist?


typo sorry, missed the 1.

https://www.mouser.co.uk/datasheet/2/90/CMPA901A035F-1665444.pdf

and

https://www.mouser.co.uk/datasheet/2/90/cmpa801b025-876408.pdf for the older one I have.

Neil G4DBN

On 29/04/2021 23:16, Tim, VK2XAX wrote:
Hi Neil,

The mob in China I used for the 122GHz boards do Rogers with Silver, Gold or Tin plating.

Specifically they will do RO4350B, RO4003C, RO3003, RO3010 & RT5880.

https://www.pcbcart.com/pcb-fab/high-frequency-pcb.html


Can you point me at the data sheets for the CMPA's? A quick google didn't find anything!

cheers

Tim












Re: PCB fab for SHF laminates with immersion silver plating and solder resist?

Stefan
 

Neil

How many dollars are those devices?

Stefan

----- Original Message -----
From: "Neil Smith G4DBN" <neil@g4dbn.uk>
To: <UKMicrowaves@groups.io>
Sent: Friday, April 30, 2021 8:40 AM
Subject: Re: [UKMicrowaves] PCB fab for SHF laminates with immersion silver plating and solder resist?


typo sorry, missed the 1.

https://www.mouser.co.uk/datasheet/2/90/CMPA901A035F-1665444.pdf

and

https://www.mouser.co.uk/datasheet/2/90/cmpa801b025-876408.pdf for the older one I have.

Neil G4DBN

On 29/04/2021 23:16, Tim, VK2XAX wrote:
Hi Neil,

The mob in China I used for the 122GHz boards do Rogers with Silver, Gold or Tin plating.

Specifically they will do RO4350B, RO4003C, RO3003, RO3010 & RT5880.

https://www.pcbcart.com/pcb-fab/high-frequency-pcb.html


Can you point me at the data sheets for the CMPA's? A quick google didn't find anything!

cheers

Tim




Re: ebay changes

 

On Thu, 29 Apr 2021 at 21:40, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
Not operational I know but we all buy/sell from it.
Anyone else concerned about ebays requirement that you let them have your bank details for direct payment rather than use Paypal. Strikes me that if they get hacked its just another way into one's private data for the thieves.
Maybe opening a separate bank account is the answer?
Ben
No I stick my company bank details on the web, so people can pay into the account.


However, the fact that one has to deliver the product before getting paid annoys me. Some products I sell use expensive parts and I will only buy the parts if someone pays me the money. Previously I got the money in my PayPal account immediately, which I could then buy parts with. But if I sign up to eBay's "Delayed payments" (they call it managed payments), then I will not get the money. I have not signed up, so can't list anything else. They keep threatening to remove my listings since I have not signed up for delayed payments, but so far they have not done so.

Most people realise from my auctions my company name, Google it, then find the item cheaper on my website, so I most sales don't come by eBay now.

I guess eventually; I will have to sign up for delayed payments, but I will leave it as long as I can.

Dave





Re: PCB fab for SHF laminates with immersion silver plating and solder resist?

Neil Smith G4DBN
 

On 29/04/2021 23:16, Tim, VK2XAX wrote:
Hi Neil,

The mob in China I used for the 122GHz boards do Rogers with Silver, Gold or Tin plating.

Specifically they will do RO4350B, RO4003C, RO3003, RO3010 & RT5880.

https://www.pcbcart.com/pcb-fab/high-frequency-pcb.html


Can you point me at the data sheets for the CMPA's? A quick google didn't find anything!

cheers

Tim


Re: PCB fab for SHF laminates with immersion silver plating and solder resist?

Tim, VK2XAX
 

Hi Neil,

The mob in China I used for the 122GHz boards do Rogers with Silver, Gold or Tin plating.

Specifically they will do RO4350B, RO4003C, RO3003, RO3010 & RT5880.

https://www.pcbcart.com/pcb-fab/high-frequency-pcb.html


Can you point me at the data sheets for the CMPA's? A quick google didn't find anything!

cheers

Tim

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


Re: ebay changes

Andy
 

On 29/04/2021 21:50, Andy G4JNT wrote:
No.
Bank details are not generally considered to be a secret
Many organisations openly publish theirs for people to pay in.
Andy
www.g4jnt.com <http://www.g4jnt.com>
Exactly. Every cheque ever used has your bank details on it and people were happy to pass them around.


Re: ebay changes

G0FCU
 

eBay don't own PayPal directly anymore so are trying to cut them out when you SELL on eBay.

The key point is that the expensive PayPal charges won't be incurred (you'll pay eBay the charges instead but they will be a little cheaper). eBay will also be able to offer alternative ways for buyers to pay.

You don't have to give them your bank details but may be restricted on what you can sell in the future.

A good explanation is:

Simon
G0FCU.



On Thu, 29 Apr 2021, 21:50 Andy G4JNT, <andy.g4jnt@...> wrote:
No.
Bank details are not generally considered to be a secret
Many organisations openly publish theirs for people to pay in.



On Thu, 29 Apr 2021 at 21:40, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:

Anyone else concerned about Ebay's requirement that you let them have your bank details for direct payment rather than use Paypal? Strikes me that if they get hacked it's just another way into one's private data for the thieves.


Virus-free. www.avg.com


Re: Offset dish geometry

Pete G4HQX
 
Edited

A standard offset (non Sky) dish is basically a plane cut through a parabolid volume of revolution so the edge would be flat and in fact would describe an ellipse. With Sky and some Vsat dishes the edges are then removed which stops it being flat!

Pete G4HQX


Re: ebay changes

Andy G4JNT
 

No.
Bank details are not generally considered to be a secret
Many organisations openly publish theirs for people to pay in.



On Thu, 29 Apr 2021 at 21:40, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:

Anyone else concerned about Ebay's requirement that you let them have your bank details for direct payment rather than use Paypal? Strikes me that if they get hacked it's just another way into one's private data for the thieves.


Virus-free. www.avg.com


ebay changes

militaryoperator
 

Not operational I know but we all buy/sell from it.

Anyone else concerned about ebays requirement that you let them have your bank details for direct payment rather than use Paypal. Strikes me that if they get hacked its just another way into one's private data for the thieves.

Maybe opening a separate bank account is the answer?


Ben



Re: Offset dish geometry

KENT BRITAIN
 

Can be, but doesn't have to be.

Kent WA5VJB

On Thursday, April 29, 2021, 01:22:41 PM CDT, John Lemay <john@...> wrote:


Hello all

Hope this is not a silly question; With an offset dish, is the rim "flat"?
In other words if the dish is placed with its rim on a flat surface, will it
be in contact all around the rim ?

Can't get my head around the geometry !

Thanks

John G4ZTR







Offset dish geometry

John Lemay
 

Hello all

Hope this is not a silly question; With an offset dish, is the rim "flat"?
In other words if the dish is placed with its rim on a flat surface, will it
be in contact all around the rim ?

Can't get my head around the geometry !

Thanks

John G4ZTR


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

Dave (G1OGY)
 

This is the problem of moving the 3cm trophy from Sat to Sun.
Bad idea IMHO.
It wasn't broke....

On Thu, 29 Apr 2021, 17:37 Neil Smith G4DBN, <neil@...> wrote:

The tricky point for me is if I work a station on 3cm in the RSGB UHF on Saturday, and want to work them again in the 3cm Trophy on Sunday, we both have to find a way to accept the dupes, or both close down the UHF contest and open the Trophy.  Also, how do I persuade someone not taking part in the Trophy to work me a second time as a dupe in the UHF so I can get the points in the Trophy?  Ok, they don't lose any points by scrubbing the first contact, but it's awkward, especially if the station is in EU.

Nothing to stop RSGB non-members from joining in the fun of the contest and giving points away, but they can only put in a checklog.  It would be huge fun if a non-member was to put in the highest score as a checklog.

Neil G4DBN

On 29/04/2021 16:40, John Quarmby via groups.io wrote:

Hi Adrian

There are several concurrent contests this weekend:

1. RSGB UHF Contest - this is all bands 432MHz - 245GHz, 1400 Saturday to 1400 Sunday (Coordinated with other EU contests)
2. RSGB 10GHz Trophy Contest - Runs 0800 - 1400 GMT Sunday
3. UK Microwave Group Low Band Contest - 1.3GHz to 3.4GHz runs 0800 - 1400 GMT Sunday.

The activity list is for the UKuG event on 1296, 2300, 2320, and 3400MHz.

73

John G3XDY

On 29/04/2021 15:27, Adrian G4UVZ via groups.io wrote:
I am easily confused !  Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

John Lemay
 

Didn’t the 10GHz Trophy used to be on the Saturday evening, alongside the 432MHz Trophy ? That’s just my memory from a few years ago, so it may well be wrong.

 

Certainly the current timings don’t seem to be met with universal approval, although I can see the logic of not running two trophy contests at the same time. But it works in October for the 1296 and 2320 Trophies, probably because there’s a lot of passing QSO partners to the next band up.

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Neil Smith G4DBN
Sent: 29 April 2021 17:37
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

 

The tricky point for me is if I work a station on 3cm in the RSGB UHF on Saturday, and want to work them again in the 3cm Trophy on Sunday, we both have to find a way to accept the dupes, or both close down the UHF contest and open the Trophy.  Also, how do I persuade someone not taking part in the Trophy to work me a second time as a dupe in the UHF so I can get the points in the Trophy?  Ok, they don't lose any points by scrubbing the first contact, but it's awkward, especially if the station is in EU.

Nothing to stop RSGB non-members from joining in the fun of the contest and giving points away, but they can only put in a checklog.  It would be huge fun if a non-member was to put in the highest score as a checklog.

Neil G4DBN

On 29/04/2021 16:40, John Quarmby via groups.io wrote:

Hi Adrian

There are several concurrent contests this weekend:

1. RSGB UHF Contest - this is all bands 432MHz - 245GHz, 1400 Saturday to 1400 Sunday (Coordinated with other EU contests)
2. RSGB 10GHz Trophy Contest - Runs 0800 - 1400 GMT Sunday
3. UK Microwave Group Low Band Contest - 1.3GHz to 3.4GHz runs 0800 - 1400 GMT Sunday.

The activity list is for the UKuG event on 1296, 2300, 2320, and 3400MHz.

73

John G3XDY

On 29/04/2021 15:27, Adrian G4UVZ via groups.io wrote:

I am easily confused !  Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian

 


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

Neil Smith G4DBN
 

The tricky point for me is if I work a station on 3cm in the RSGB UHF on Saturday, and want to work them again in the 3cm Trophy on Sunday, we both have to find a way to accept the dupes, or both close down the UHF contest and open the Trophy.  Also, how do I persuade someone not taking part in the Trophy to work me a second time as a dupe in the UHF so I can get the points in the Trophy?  Ok, they don't lose any points by scrubbing the first contact, but it's awkward, especially if the station is in EU.

Nothing to stop RSGB non-members from joining in the fun of the contest and giving points away, but they can only put in a checklog.  It would be huge fun if a non-member was to put in the highest score as a checklog.

Neil G4DBN

On 29/04/2021 16:40, John Quarmby via groups.io wrote:

Hi Adrian

There are several concurrent contests this weekend:

1. RSGB UHF Contest - this is all bands 432MHz - 245GHz, 1400 Saturday to 1400 Sunday (Coordinated with other EU contests)
2. RSGB 10GHz Trophy Contest - Runs 0800 - 1400 GMT Sunday
3. UK Microwave Group Low Band Contest - 1.3GHz to 3.4GHz runs 0800 - 1400 GMT Sunday.

The activity list is for the UKuG event on 1296, 2300, 2320, and 3400MHz.

73

John G3XDY

On 29/04/2021 15:27, Adrian G4UVZ via groups.io wrote:
I am easily confused !  Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

steve G1PPA
 

John also
70cm trophy Saturday 
To many all at same time for me portable 
Will be sorry to miss low band contest 
Steve 
G1PPA 


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

John Quarmby
 

Hi Adrian

There are several concurrent contests this weekend:

1. RSGB UHF Contest - this is all bands 432MHz - 245GHz, 1400 Saturday to 1400 Sunday (Coordinated with other EU contests)
2. RSGB 10GHz Trophy Contest - Runs 0800 - 1400 GMT Sunday
3. UK Microwave Group Low Band Contest - 1.3GHz to 3.4GHz runs 0800 - 1400 GMT Sunday.

The activity list is for the UKuG event on 1296, 2300, 2320, and 3400MHz.

73

John G3XDY

On 29/04/2021 15:27, Adrian G4UVZ via groups.io wrote:
I am easily confused !  Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian



Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

Dave (G1OGY)
 

Please see:
<https://www.rsgbcc.org/cgi-bin/readcal.pl?year=2021&type=full>
and
<https://www.microwavers.org/files/contests-2021_v4.pdf>

Dave, G1OGY

On Thu, 29 Apr 2021 at 16:27, Adrian G4UVZ via groups.io
<adrianwhatmore248=btinternet.com@groups.io> wrote:

I am easily confused ! Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

Eddie G0EHV
 

RSGB Trophy contest on Sunday.


On 29 Apr 2021, at 16:27, Adrian G4UVZ via groups.io <adrianwhatmore248@...> wrote:

I am easily confused !  Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian


Re: Activity List for the UK Microwave Group Low Band Contest - Sunday 2nd May

Adrian G4UVZ
 

I am easily confused !  Is 10 GHz included in this cantest ? I can only see Ben mentioning 10GHz and something about a trophy on a Sunday..not sure if that is this Sunday?

Adrian

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