Topband: Re: Coax capacitor losses

[Rick Karlquist]

John Kaufmann said:
> Let me update my earlier post about losses in coax lines, where I
> cautioned people about using them as reactance elements (capacitors or
> inductors).  If you are familiar with the Smith Chart, you can calculate
> the loss resistance in a section of line, based on its length and its loss
> specs (dB/ft or dB/m).  Then you can determine whether or not you will

You also need to know how much of the loss is due to dielectric loss
tangent vs conductor resistance.  For a matched 50 ohm line at 1.8 MHz,
the dielectric loss is negligible.  However, it may be significant in a
capacitor made out of coax.

Rick N6RK