[Elecraft] Upper limits of KPA500?

[Frank Scolaro]

Actually that would be good to know...  I let the 
fans take the temp down to room temp before 
shutting the 1500 off... Frank (W2YK)

At 07:35 PM 5/5/2020, Dave Cole wrote:
>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 > > 
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