[Elecraft] KPA500 fan noise

[Jack West]

SAME HERE,

I RUN MY KPA-500 IN FSK AT 270 WATTS OUT INTO A 1:1 SWR AS NCS OF THE RATTS RTTY 
NET. DURING THE LONG PREAMBLE AND ENDING MESSAGE MY TEMP GETS UP TO 70 AND 
SOMETIMES 73 DEG C. THE FAN ROARS LOUDLY AFTER 70 DEG IS REACHED. I HAVE AN 
ADDITIONAL FAN BEHIND THE FAN IN K3 TO ASSIST SUCKING THE AIR OF OUT OF THE AMP. I 
WISH IT DID NOT HAVE TO WORK SO HARD THAT THE FAN HAS TO GO INTO HIGH SPEED. I 
HAVE PLENTY OF CLEARANCE UNDER THE AMP SUCH AS NOT TO RESTRICK AIR FLOW.

73 de
Jack / W7LD / "Lucky Dog"

----- Original Message ----- 
From: "Terry Burkholder" <tabn4tb at centurylink.net>
To: <Elecraft at mailman.qth.net>
Sent: Thursday, September 03, 2015 11:58 AM
Subject: [Elecraft] KPA500 fan noise


> During a normal rag chew after three or four minutes, the temp on my KPA500 hits 
> 70 degrees and the fans are at full blast. It is difficult to hear over the fan 
> noise even when using headphones. Running 480 watts out (verified on a 
> calibrated wattmeter) on 20 meters. SWR is 1.0:1.
>
> Is this normal for the KPA500?
>
> Thanks
>
> Terry N4TB
>
>
> ______________________________________________________________
> 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 w7ldxp at embarqmail.com 


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus