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Thank you for your reply, I finally chose two smaller cpu cooler instead of the first. I'm happy to know that the original ones were enough but, until I saw how hot was the 7805 connected to the raduino board, I have started to doubt about the ubitx cooling in general. In fact I added a small heatsink for it too.
On Thu, 15 Oct 2020, 19:12 Don - KM4UDX, <dontAy155@...> wrote: