[Amps] time to death in the event of a blower failure

[Bill, W6WRT]

ORIGINAL MESSAGE:

On Tue, 09 Nov 2010 06:10:42 +1000, Adrian <vk4tux at bigpond.com> wrote:

>I am surprised that a laser thermometer sensor with a programmable 
>safety output level has not been
>utilised in high end amps, with the laser set on the anode seal area to 
>trigger a shutdown circuit when temperature approaches high limit.
>We use these thermometers in the HVAC industry and they are accurate and 
>immune to HV.

REPLY:

Most of that semiconductor based stuff has a hard time in a
kilowatt-plus RF field. Plain old iron is best.  :-)

73, Bill W6WRT