[Elecraft] KPA1500 Fan Noise Video posted

[turnbull]

The Valve amps do not require such cooling.   73 Doug EI2CN


Sent from my Samsung Galaxy smartphone.
-------- Original message --------From: Don Butler <n5lz at comcast.net> Date: 02/06/2018  08:01  (GMT+01:00) To: 'Richard Thorne' <rthorne at rthorne.net>, Elecraft at mailman.qth.net Subject: [Elecraft] KPA1500 Fan Noise Video posted 
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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