[Elecraft] Upper limits of KPA500?

[Dave Cole]

Remember...  Just because you think they are out to get you, does not 
mean they are not out to get you...

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

On 5/5/20 2:33 PM, Eric Norris 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 <mailto: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
> 
>