I'm living in a forest with a tool hill of trees to the east, north and south. The 30-50W I use when operating FT8 will usually result in a 10 - 20 dB difference in signal received vs sent. So I figured I would increase the output a bit to perhaps 100 or 150W when operating FT8 and 600W for SSB/CW. The MRF 300 transistors are relatively cheap ($52 per transistor) and boards are available assembled or as a kit for about $100. I decided to go with a board from DX World-e in Greece. Today I started on mounting the components into a small box.

The image below shows the top half of the cabinet with the amp, TX relay and connectors for inpit and antenna 1 and 2 on the back.

When the box is turned upside down the heatsink will sit on the top left and there is room at the buttom for the low pass filters and the front plate with switches and SWR instruments.

The back of the cabinet has input and output as well as a place for the power cord to be attached. The bias circuit and relays require 12V and the MRF 300 transistors will operate on 52-57V to get to the full 600W power. I have not yet decided if I want to use an external 12V source or build a step down converter and regulator from the 54V line.

There is still a bit more work until I can power it up and after that there is a similar version for 2m to put into a second enclosure.