To add to Shirley's great response:
When first released, the RPi 4 had heat issues, but shortly after the RPi 4 was released, updated firmware was released that corrected the issue.
Firmware updates happen in the background when you run a recent OS image from the Raspberry Pi Organization.
You shouldn't have an issues with heat, the RPi in the sBitx is 'floating' over the digital board with ample air-flow in my opinion.
Ken, N2VIP
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On Aug 15, 2022, at 12:29, Shirley Dulcey KE1L <mark@...> wrote:
The Raspberry Pi in the sBitx does not work especially hard. The processor gets warm but is well within specs. Mine has small paste-on heat sinks, but that's because I had already installed them when I was using that Pi for other purposes; I bought the basic kit. (I have switched to an RPi Model 400 for what the one in my sBitx used to do.) If you want to install heat sinks similar to mine they won't do any harm, and might help if you operate your sBitx in very hot conditions (say, on a picnic table in the sun); they are readily available for a couple of dollars. A more substantial heat sink like one of the tall tower ones (with or without fan) should never be necessary, and might cause a problem fitting the Pi into the sBitx case.
