Re: LF: beacon power control (was Re: LF: IK1ODO beacon signal)

["Rik Strobbe" <rik.strobbe@fys.kuleuven.ac.be>]

At 11:17 3/05/00 +1, IZ1ANT wrote:
> On the contrary a very accurate PA proctection would be required if 
> a POSITIVE feedback to the antenna current meter has to be connected 
> to an unattended TX.
The feedback from the amp-meter to the TX is NEGATIVE (if the
antennacurrent increases the TX output power is forced to decrease). In
combination with a reflected power protection (as used by G3YXM in this TX
design) the TX will withstand any mistreatement including short- and
open-circuit.
As the beacon is meant to be low-power (10mW and less) a relative small TX
power can be used (50 Watts and less), so it can easily be overdimensioned
to provide extra safety.

73, Rik  ON7YD