[Elecraft] KPA1500 Fan Noise Video posted

[Paul Baldock]

Does the power supply make any significant noise?

- Paul

At 11:01 PM 6/1/2018, Don Butler wrote:
>In response to N5ZC’s request  I just made 
>this short video to provide a listen to the 
>KPA1500's fans ... at least as they sound in my 
>shack.  Follow this link to view: 
>https://vimeo.com/273064144 In addition to the 
>KPA1500 the video also includes footage of my 
>Alpha 9500 and Icom PA1 
 each running with 
>their fans at maximum speed 
… to provide a 
>simple rather crude comparison. What do I 
>think?   I think that fan speed 1 and fan speed 
>2 on the KPA1500 are probably comparable to the 
>fans that are installed on the other amplifiers 
>as far as sound and efficiency are concerned and 
>likely provide a similar degree of cooling at 
>those speeds.   And, I think that fan speeds 3, 
>4, and 5 (which are indeed noisy) provide the 
>KPA1500 with enhanced cooling capability that is 
>simply not available on other amplifiers. Don, 
>N5LZ -----Original Message----- From: 
>elecraft-bounces at mailman.qth.net 
>[mailto:elecraft-bounces at mailman.qth.net] On 
>Behalf Of Richard Thorne Sent: Friday, June 01, 
>2018 5:55 PM To: Elecraft at mailman.qth.net 
>Subject: [Elecraft] KPA-1500 Fan Noise - YouTube 
>? This fan noise issue has me concerned to the 
>point that I’m considering cancelling my 
>order. While the amp won’t be on my operating 
>desk, it will be on a rack next to my operating 
>desk.  Remoting the amp is not an option. Quite 
>frankly I have no interest in remoting the amp. 
>Is there anyone out there that has a KPA-1500 
>willing to post a YouTube video so we can hear 
>the fan in action and judge the noise for 
>ourselves? From the research I’ve done it 
>appears that if you want a solid state amp, 
>regardless of make, you need to be prepared for 
>fan noise. Thanks Rich - N5ZC Sent from my 
>iPhone 
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