[Elecraft] Normal KPA500 behavior?

[Ron D'Eau Claire]

Hi Mike:

I'm sure that LED flash is quite normal. Mine has done that since "day one".


I do not experience the jumping temp readings though. A couple of
speculations:

1 - Does it do that when the amp is connected to a dummy load?  (Thinking
maybe an RF feedback issue.)

2 - What's your line voltage and how much does it sag under full load?
(Thinking that possibly a low line voltage is causing a voltage regulator in
the sensor circuit to "drop out" and lose regulation.) 

Ron AC7AC

-----Original Message-----

>Hi,
>
>My KPA500 does a couple of things that seem a bit odd.  Other KPA owners -
do your KPAs also do the following?
>
>1)  When I transmit a 500 watt carrier while displaying TEMP the displayed
temperature drops 5 degrees C.  When I release the key the temperature goes
immediately back to the real value.  Lower transmit power levels cause a
correspondingly lower drop in displayed temp.  This behavior causes the temp
display to bounce around while transmitting CW.
>
>2) When I power down my KPA the fan turns on (as it should) and then the
right most POWER LED flashes on an off quickly.  Is that LED flash normal?
>
>Thanks and 73,
>
>Mike - ke5akl