[Elecraft] KPA-1500 Fan Noise - YouTube ?

[Michael Walker]

Bill is correct

You have to move air to cool down those devices and it takes fans to do
it.  Water cooling might work if you wish to modify it.  :)

But, there is no free lunch as was mentioned.  Be prepared that any 1500
watt LMDOS amp requires cooling but since there is no tube, they are built
in smaller boxes, so you get smaller fans that have to move more air.

The B26 is somewhat quieter I think, but they worked on some things to make
it quieter like extending the fan out the back so there is less disturbed
air when it hits the fan blades.

They aren't that loud and if were good headphones, you won't notice at all.

my 2 cents, Mike va3mw


On Fri, Jun 1, 2018 at 8:32 PM, Bill Stravinsky via Elecraft <
elecraft at mailman.qth.net> wrote:

>  Rich
>
> You pretty much hit the nail on the head about solid state amps.  As they
> say there's no free lunch.  Solid state has made great strides in high
> power ampsbut its still solid state and a p/n junction or some form
> thereof.  1500 watts of heat in those junctions has to be cooled down or it
> won't be long before it needsnew parts.
> Depending on your operating habits (contesting, casual, or whatever) there
> will be varying degrees of fan noise.  The higher the duty cycle the higher
> thefan requirements.  Pick your poison, a small light weight amp easy to
> move around or one you need a fork lift to pick up.  I prefer tube amps for
> a few reasonsand have the Acom 2000a (and an Alpha 89 that now sits in the
> living room temporarily) but I'm still glad I got the kpa1500 at least so
> far.
> The kpa sits nicely on top of the Acom without causing the table they sit
> on to crash to the floor in pieces, hi.  I'm surprised nobody has made a
> you tube ofthe amp in operation actually.  But there are only just over 200
> of the new amps out there.  Good luck with your investigation, Rich.
> BillK3WJV
>
>     On Friday, June 1, 2018, 8:00:29 PM EDT, Richard Thorne <
> rthorne at rthorne.net> wrote:
>
>  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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