Hi, For CB use, it might be good to check what your country allows (if you care about stuff like that). Even if there are no laws against it, these type of amps in CB use generate strong harmonics that cause interference on higher frequencies, e.g. police, fire, emergency, etc. Harmonics could be reduced if an additional low pass filter was added. The data sheets show an amp with bascially no bias, so the circuit is made for a class C operation like FM. The amp pictures show diode biasing which is a pretty bad method. Here is a good reference for making a good bias circuit for it and explains what's wrong with the first two methods (if you want linear operation): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm You can see from the data sheets, that the transistors are made for up to 80W out each. So the pair of them should make max 160W -- anything over is distortion and splatter I would expect. 73.