[Elecraft] Upper limits of KPA500?

[Nr4c]

Why not let the computer in the amp do its job?  And besides, the fans run after the amp is turned OFF. This discharges the caps and starts the orderly “cool down” cycle. 

You may be a brilliant engineer, but no need to re-engineer a system that works pretty well. 

Sent from my iPhone
...nr4c. bill


> On May 5, 2020, at 5:35 PM, Eric Norris <norrislawfirm2 at gmail.com> wrote:
> 
> This has been very educational.  I have, unfortunately, faulted both my
> veteran KPA500 and KPA1500 more times than I can count.  I've been so
> paranoid about keeping them otherwise healthy, that I manually manipulate
> the fan speed using the utilities--increasing the KPA500 fan speed when it
> gets into the 60Cs, and the KPA1500 when it gets into the 70Cs.
> 
> The downside is I sometimes forget to reduce the fans when the chase is
> over, and the amps quickly cool to room temperature, only to heat up again
> when the next chase is underfoot.  Is this rapid cooling and heating even
> worse for the life of the devices, and then again what about turning off
> the amps when going QRT?  Should they be cooled to room temp first, or just
> until the fans stop running in NOR mode?
> 
> The question isn't is one paranoid, but is one paranoid enough?
> 
> 73 Eric WD6DBM
> 
>> On Mon, May 4, 2020, 9:12 AM Jack Brindle via Elecraft <
>> elecraft at mailman.qth.net> wrote:
>> 
>> From the KPA500 manual, Rev E1, page 41 Specifications:
>> Duty Cycle at 500 Watts  10 minutes key down / 5 minutes standby
>> 
>> Sometimes it is very worth while to read the manual. It gives me something
>> to do when being stuck at home for so long gets me down.
>> 
>> 73!
>> Jack, W6FB
>> 
>> 
>> 
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