Hello -Sorry I have been away for a while - serious family medical issues (more about that later) and I am binge reading the EM Drive forum. In doing some searching for UHF RF amps I found the following on eBay. I haven't seen these mentioned on the forum so I thought I would throw this out. Below is just one link - the vendor has quite a few different combinations. Basically these are 2.3 Ghz linear RF amplifiers boards removed from Spectrian RF amps which output up to about 75-80w depending on drive. At 2.45 they are a few dB down and can generate about 40w - although EM Drive DUTs could easily be sized for 2.3 Ghz. (see TheTraveller's wonderful spreadsheet). This unit is right about $100.Anyway as mentioned these areand can be used either a amps for a CW signal or modulated with various schemes (AM, SSB etc) if desired. There are complete RF units available which can get up to about 180+w paralleling outputs. That unit is about $350. The vendor has a fair amount of data on his eBay page and provides enough info for further google mining.Hope this is helpful!Happy New Year to All - HermanPS.Shell - CONGRATS on results!!!!!!!! Looking forward to more data. You are the gold standard we are all watching! It is so rewarding to see what careful engineering can do. I agree with a post somewhere back a few pages - I think you must have a third arm and a few dozen Watchmakers.Phil (TT) - glad to hear the good medical news! and as someone trying to clean out years of stored debris from my garage workshop I appreciate your situation there too. Looking forward to your build this year.rfmwguy - Dave - contgrats on your Moderatorship and all hail the Guardian of the Forum and looking forward to NSF-1701 part Deux.EDIT - Spelling correction - ready to reading.