Re: How susceptible is the DRAWS board to RFI? Metal Case required?


There are two types of RFI to consider. 

RFI from the Pi + HAT, which are generally not a problem. 

Then there is RFI to the Pi.  Some ham installations have lots of RF in the shack.  This can lead to interference with the operation of the Pi and potentially the HAT.  If you encounter this problem, then shielding and other mitigation steps may be necessary, including ferrites and shielded cabling, shielded case, and proper grounding.

On Tue, Jul 28, 2020 at 6:51 AM Bryan Hoyer <bhhoyer@...> wrote:
Acrylic cases are suitable with a couple of caveats:

Be mindful of Temperature rise, probably not suitable for Pi4

One customer had RFI issues and fixed them with a grounded metal plate on top of their acrylic case

C4Labs makes acrylic cases for DRAWS both versions 1 with the SMA on the side and version 2 with the SMA on the end. They are working on a new version for the current rev, which has the Barrel Connector for DC.

Bryan K7UDR

On Jul 28, 2020, at 6:33 AM, Charlie Hein <chein@...> wrote:

Just askin'.  Is an acrylic case suitable, or should the Pi and DRAWS be housed in a metal case to help prevent RFI?


John D. Hays
Kingston, WA


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