[Elecraft] Temperature or Warmth of KPA500 when "Off" ?

[Dave]

I would assume so, as mine is the same way...  So unless both of our 
KPA500's have failed in the same way, at the same time, it is more than 
likely normal.  A short call to Elecraft will answer your question with 
more surety.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 6/30/21 12:35 PM, Andy Durbin wrote:
> "But, is this normal?  I assume that there is a small current powering a micro processor and its related circuitry but should it be actually that warm — is there a cpu burning "idle loop" used and thus causing high current flow thru the processor."
> 
> My KPA500 draws 0.14 A when "On" and in standby mode.  It draws 0.10 A when "Off" with rear power switch still on.  Both measurements at 117.2 VAC (A/C is running at my house and probably every other house on the same transformer).
> 
> Yes the CPU is active when "Off".   It has to be for the KPA500 to be turned on my serial command.
> 
> "The KPA500 uses single character commands when in boot mode. Boot mode is the state the KPA500 is
> in when the rear panel power switch is in the ON position, while the main firmware is not running. This
> mode is used for starting up the KPA500 or downloading fresh firmware. Bootloader commands must be
> sent upper-case only."
> 
> 73,
> Andy, k3wyc
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