Let's add the lack of true complementary P and N channel devices. Still, are transistors any better? Once again, better for what? If a solid-state uses global feedback, the transistor wins easily. Why? Because it has much greater transconductance, which means more gain, which means more feedback. On the other hand, if the amplifier is feedback free, the MOSFET probably wins, as its static transfer function is straighter. Still only a little emitter degeneration across a small valued resistor performs wonders in straightening out the transistor. 
   I wish some company would look into bringing out the Gridister or the Lateral Punch Through Transistor. Or maybe we can make a compound device out of existing devices. One such circuit is shown below.

E-Mail from where?
    The rule has been to omit last names and e-mail addresses unless the writer had clearly expressed for their inclusion. This rule will continue. However, a few readers have asked that all e-mails include the country of the sender. I like this idea and hope to see these inclusions. So please where are you from?

   
                                  Editor
                                   USA

   The circuit shown above is not efficient, but it may sound great. By selecting the right resistor values, we select the rp and Gm of the circuit Hybrid power amplifiers is a topic that is ripe for an article or two in this journal. Single-ended and push-pull hybrid amplifiers might be the best compromise when a budget is tight.  Who knows? It might also be the best compromise period. Let's see what the next issue brings.