8 Band RF Switch V2.1 PCB Error

Discussion about this major DATV Project. See also https://wiki.batc.tv/The_Portsdown_Transmitter
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g4eml
Posts: 3
Joined: Thu Apr 26, 2018 9:36 am

8 Band RF Switch V2.1 PCB Error

Post by g4eml » Sat May 12, 2018 1:36 pm

I haven't seen it mentioned elsewhere so I thought I would report the following so it doesn't catch out others.

Whilst assembling the 8 Band RF Switch on a V2.1 PCB under a microscope I noticed that the pads at the ground ends of R1 and R2 in the input attenuator were not connected to anything. It looks like the thermal relief connections to the surrounding ground plane were missed out from the PCB design.

It is easy enough to correct this, just scrape away a little of the solder resist next to the pads and add a blob of solder to join the pads to ground.

Colin G4EML

G4KLB
Posts: 199
Joined: Wed May 28, 2008 10:46 am

Re: 8 Band RF Switch V2.1 PCB Error

Post by G4KLB » Sat May 12, 2018 5:17 pm

Thank you for posting this.
The artwork has now been amended, but anyone with a V2.1 PCB will need to do that mod.
Last edited by G4KLB on Sat May 12, 2018 9:02 pm, edited 1 time in total.

g0uhy
Posts: 48
Joined: Fri Aug 05, 2011 3:09 pm

Re: 8 Band RF Switch V2.1 PCB Error

Post by g0uhy » Sat May 12, 2018 5:34 pm

Hi Colin and Colin,

I'm just building mine so a timely alert. I am waiting for the resistors for R1 and R2 and have modified the board in preparation. I checked the V1.0 board and that is fine. Luckily, it's a simple fix.

Thanks for the heads up.

73

Malcolm G0UHY

G8GKQ
Site Admin
Posts: 926
Joined: Sun Mar 22, 2009 1:21 pm

Re: 8 Band RF Switch V2.1 PCB Error

Post by G8GKQ » Sun May 13, 2018 8:57 am

Thanks Colin

I have amended the Wiki to include this. Would you be able to provide a photo of your modified board? All of the development team are still working with Version 1 boards....

73

Dave, G8GKQ

g4eml
Posts: 3
Joined: Thu Apr 26, 2018 9:36 am

Re: 8 Band RF Switch V2.1 PCB Error

Post by g4eml » Sun May 13, 2018 10:59 am

Hi Dave,

Attached is a picture of the modified area.

73
Colin G4EML
Attachments
PICT0002.JPG
Picture of modification to V2.1 Board
PICT0002.JPG (1.44 MiB) Viewed 422 times

G8GKQ
Site Admin
Posts: 926
Joined: Sun Mar 22, 2009 1:21 pm

Re: 8 Band RF Switch V2.1 PCB Error

Post by G8GKQ » Mon May 14, 2018 1:54 pm

Thanks Colin

I've included it on the Wiki.

Dave

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