It was mentioned in another thread that W8JI, the well respected engineer that designed many of the Ameritron amplifiers and medical devices, made some comments about CB leenyars on the qrz forum. I thought it was a good read. https://forums.qrz.com/index.php?threads/2sc2879-producing-250-watts-hahaha.248732/ Quote w8ji "Just out of curiousity I bolted up a single 2SC2879 in class C (zero bias) in a single ended amplifier with resonant transformer. Heatsink is massive and I used a soft copper gasket for better heat transfer, no grease. On 5 MHz I can easily push it to 30 amps Ic at 18 volts and get almost 300 watts output. At about 30 amps my supply shuts down. I didn't filter the output beyond the resonant transformer but the 2nd harmonic was about 15 dB down and 3rd harmonic much less level than that. Harmonics were pretty much gone after the third. The harmonics clearly contribute less than 10% to the output measured. The statement a single 2SC2879 can produce 250 watts is accurate, so long as linearity and long term reliability are not factors, and the 250 watts does not have to be "harmonics" or things that mislead power meters (although this could be true in some cases)."