[AMPS] SWR Protection

[Peter_Chadwick@mitel.com (Peter Chadwick)]

Tom said:

>The most accurate way to read power into a load in situations 
>where there is a lot of power factor (reactance or reflected power) at 
>radio frequencies is to measure temperature rise of the load.

Even when the SWR is good, that can be the best way. It certainly used to be the
way that big (over 10kW) transmitters were tested professionally - you've got to
dissipate the energy as heat anyway. It's quite something to see the steam
rising from the cooling pond on a cold morning!

Another advantage is that DC can be used in a substitution measurement, so the
method has potenetially better accuracy.

73

Peter G3RZP


--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com