Gary
Best is to cool the radio at the bottom, as the back side is not really a part of the internal heatsink. Besides cooling also lowering the inoutvoltage to 10,5V? is advised because a part of the heat is generated by the internal (lineair) 9V voltage regulator.
https://pseudovoice.wordpress.com/2022/09/06/x6100-auxiliary-passive-cooler/
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Robert
