dt307 wrote:What worked for me was
Set the max power inside to 10w fm and 18w ssb
This is a good solution and works well in two areas. It runs the radio cooler with less strain on the outputs which are fragile enough. Plus perfect, like you say, for running a linear without overdriving it.
But buying brand new the chances are it will come with warranty seals attached. So it would depend on the OP's desire to break the seals and invalidate the warranty. Especially as, unlike the 5555's etc, the 135's and 6666's can be programmed via a USB connector on the back so there's no genuine reason to take the lids off.