[Amps] Re: [Amps] Re: [Amps] Re: [Amps] Bird® 43 Ma nual

[Ian White, G3SEK]

Mike wrote:
>I take issue with the assertion that power is a scalar quantity that 
>can't have a direction. It is no more scalar than voltage or current 
>(they all have a sign associated with them, but none of them are 
>vectors). On the other hand, the poyting vector "S" which is the cross 
>product of the E and H field vectors in a TEM transmission line has a 
>direction which corresponds to the direction of power flow in the 
>transmission line. When a TEM wave hits a physical discontinuity, the 
>poynting vector of the reflection created is flipped 180 degrees with 
>respect to the incident wave. The reflected power flows in the opposite 
>direction from the incident power.
>

I stand corrected by both Mike and Bert.

[Sorry, we now have visitors for Easter so I'll have to bow out for a 
few days.]

-- 
73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                           'In Practice' columnist for RadCom (RSGB)
New e-mail: g3sek@ifwtech.co.uk
New website: http://www.ifwtech.co.uk/g3sek