<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">We have been testing the Pi4 with Hamvoip code and it is working well and will soon be released as a general update which will make the Hamvoip code compatible with the Pi2, 3, and 4.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">In testing it is apparent that the Pi4 creates significantly more heat than the previous Pi's. The 1G memory model draws about 50% more power at rest. Not all of this is CPU as the peripheral chips have also been enhanced.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Users should consider a different case style for the Pi4. In particular I would stay away from totally enclosed cases. The Pi4 will require at a minimum heatsinks and a fan is highly recommended. I am attaching a link to a real nifty open case that will work for the Pi3 or Pi4. It is available on Amazon for $8.99 on Prime. It comes with a case, fan, and heatsinks for both the Pi3 and Pi4. For the Pi4 it includes heatsinks for every device all of which are on the top of the board. The case is an open design so if the fan was to fail it would probably not go into heat throttling unless you were heavily using the CPU beyond what Hamvoip would require or your ambient temperature was very high.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">In my tests the Pi4, open on the bench, with heatsinks and booted up running Hamvoip code but not connected anywhere had a constant CPU temperature of about 57C. This is with an ambient temperature of about 72F.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">The same test installed in the open case with fan resulted in a constant 36C temperature. Better than a 20C or 38F difference! You do not need to blow much air over the CPU to cool it. I would also recommend continuous cooling as cycling the fan would be meaningless with the heat build up of the Pi4. <br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Here is the Amazon link to this case. It is a real bargain considering what it includes.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><a href="https://www.amazon.com/gp/product/B07T2CPC2H/ref=ppx_yo_dt_b_asin_title_o00_s01">https://www.amazon.com/gp/product/B07T2CPC2H/ref=ppx_yo_dt_b_asin_title_o00_s01</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Attached are photos of the board that I mounted in this case.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br clear="all"></div><div><div class="m_-3687903067822692792gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div><b><font size="4">73 Doug<br></font></b></div><b><font size="4">WA3DSP<br></font></b></div><b><font size="4"><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a><br></font></b></div></div></div>
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