Thanks to the very helpfull YouTube video from Mike N2MDX I'm building a DXWorld-e MRF300 LDMOS 600W HF/6M LINEAR AMPLIFIER 160-6m to fit behind my Hermes Lite.  DXWorld-e provides high quality HAM gear, check their website. Powersupply used is the ELTEK Flatpack 2 3kW 50v, the cheapest one I could find came from eBay. The build is in progress, I will update frequently.