[Elecraft] KPA1500 power aupply fan

[Eric Swartz - WA6HHQ, Elecraft]

Rick and everyone - There should be NO fans running in the power supply after 
turning off the RF deck from its front panel.
Are you sure the RF deck front panel is OFF? (No lights on the RF deck FP)

The PS fan runs from the same supply that supplies the 50 V to the amp. That 
supply is definitely turned off when the RF deck front panel is off, which also 
kills the PS fans. The fans have absolutely nothing to do with the 12 VDC supply 
going to the RF deck.

In any case, no not modify how voltage is supplied to the RF deck, as this will 
not fix anything and will definitely void the Warranty.

If you are not able to resolve this issue contact our team at 
support at elecraft.com or via the phone and we'll help you figure out what is 
happening.

My only thought is that there could be a short in the control cable between the 
amp RF deck and PS that is keeping the 50V supply and fans on in the PS. (Or on 
one of the connectors in the RF deck or PS.) Our support team will help you 
debug whatever is happening if its a hw issue..

73,
Eric
/elecraft.com/

On 10/1/2018 2:43 PM, Rick Stealey, rstealey at hotmail.com wrote:
> K2XT here.  Greetings,
> We are installing K8DM's brand new KPA1500 here at my qth today replacing a KPA500.
> He runs the station remotely from VA; my QTH is in NJ.
> (I host the station for him).
>
> So, it is powered up and running.  When not in use it appears as if (according to the manual) it needs to generate a small voltage/current to the rf deck to allow it to function.  No problem, that makes sense.
> The problem is, there is a fan running in the power supply, and it is annoying!  The remote station is in a spare bedroom and visiting guests will have to endure this noise.  Plus, I'd like the equipment to go off when it is turned off.  I don't want a fan running 24/365.  Does the PS really generate that much heat that it needs a fan?
>
> This is not acceptable.  Wayne, surely you didn't design it this way.  Surely there is an option we set somewhere to disable the fan.
>
> What say, anyone?
>
> Rick  K2XT
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