Well after a lot of pondering and measurements and some small mistakes the heatsink for the handheld is done and installed, in my Simplex Repeater in-a-box
I started with a 100x100x18mm heatsink. A lot of filing for the multifaceted final project was done. i.e. the oblong cut on the front is there for the AAA battery case to pass over and lock. Let alone the radio’s back was also complex with three levels of.
The headsink was mounted with semi-permanent LED thermal adhesive. Its trace shows as white on the heatsink bottom.
And this is what is left of the battery case. It was used to solder the power wires and not permanently modify the radio.
That’s all, now what is left is field testing…