Re: Wave guides for very low frequencies Hz-kHz

On Sep 1, 4:09=A0pm, "Timo A. Nieminen" <t...@[EMAIL PROTECTED]
> wrote:

> Through it, or around it? In any case, you'll get tunnelling even if
> you're below cut-off.

"tunneling"???!!!

Puhleeeze!  Hey Timo, time to hit the sophomore E&M textbook again!
What do you think he built? "Quantum conduits" for the star ****p
Enterprise?

The actual truth is that a waveguide run below cut-off does indeed
transmit waves, but they logarithmically attenuate with distance down
the guide. In this mode (below cut-off)  they are called "evanescent
waves". Such a piece of guide actually makes a pretty decent RF
attenuator with a very wide dynamic range. People sell these. But if
the frequency gets too low then the length gets too long to be
practical.

The alternative as others have suggested is lumped circuits which work
well at lower RF frequencies.

PS. Hey Timo! I didn't know you play bass! So do I! Now I feel real
sorry for the hard time I've given you here from time to time...well,
maybe not. Say, your bass is missing a string or two!