The above shows my 9cm transverter. It gives about 5W in 3400MHz. The boxes are rather old but still work fine after adjustment of all currents. The PA has 46dB gain which makes a attenuator necessary.
This photo shows the assembly side with the RF transistors. The other side carries the filter cups aß Well as some other larger components.
The small box ist the oscillator/multiplier and the other one the transverter.