Thanks for the 50W PA link! Please keep us posted how this HF PA plays with LimeSDR.
There is also the $15 kit of this PA if anyone is adventurous to couple two of these for 2mW IN, 100W OUT.
$15 50-W PA Kit:
$47 100-W LPF:
Here is the PA advertised output:
73, Rob KK6IOZ