[Elecraft] KPA1500 power aupply fan

[Eric Swartz - WA6HHQ, Elecraft]

No changes in PS operation at all since the early KPA1500s shipped. 

If the fans in the. PS do not turn off within 10 secs or so after the RF deck front panel power button turns it off, please contact support at elecraft.com for help.

73,

Eric
elecraft.com
_..._



> On Oct 4, 2018, at 7:28 PM, Dauer, Edward <edauer at law.du.edu> wrote:
> 
>    Mine works exactly as Eric says it should.  I have not uploaded any new F/W, still using the original issue.  Anything change for the PS in a newer version?  Just a thought . . . .
> 
> Ted, KN1CBR
> 
>    ------------------------------
> 
>    Message: 13
>    Date: Wed, 3 Oct 2018 14:43:58 -0700
>    From: "Eric Swartz - WA6HHQ, Elecraft" <eric at elecraft.com>
>    To: Rick Stealey <rstealey at hotmail.com>,    "Elecraft at mailman.qth.net"
>        <Elecraft at mailman.qth.net>
>    Subject: Re: [Elecraft] KPA1500 power aupply fan
>    Message-ID: <7affdd68-d9cc-05ed-5ac2-dc22f3406218 at elecraft.com>
>    Content-Type: text/plain; charset=utf-8; format=flowed
> 
>    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/
> 
> 
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to eric.swartz at elecraft.com