[TowerTalk] Roller inductor sources

[Peter Chadwick]

One problem with the L network (single ended or balanced) is that working Q is a function of impedance transformation ratio.

                                                      Q = Ö([Rp/ Rs] – 1)                                                                                           

Every time you double the working Q, you increase the losses by 4. The currents and voltages can get high enough to be embarassing, too.

The T match enables Q to be controlled, but in this particular application, what's wrong with a parallel (or series if it's low impedance) tuned circuit and link coupling? A lot less complex.

73

Peter G3RZP