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KPA1500 power supply fan?

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Charles Johnson-2

KPA1500 power supply fan?

I’ve seen no mention of a fan inside the power supply cabinet of the new KPA1500. Anyone know if one is there and what might be the noise impact? Variable speed maybe?

73, Charles, K4ZRJ

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Clay Autery

Re: KPA1500 power supply fan?

It's a purpose built switcher, so they may have been able to use
passive-only thermal management...

______________________
Clay Autery, KY5G

On 5/1/2017 9:05 PM, Charles Johnson wrote:

> I’ve seen no mention of a fan inside the power supply cabinet of the new KPA1500. Anyone know if one is there and what might be the noise impact? Variable speed maybe?
>
> 73, Charles, K4ZRJ
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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Josh Fiden

Re: KPA1500 power supply fan?

Not likely. 2400W output, optimistic efficiency 95%, you've got to dump
>125W heat key down at full power on high duty cycle modes. It has a
fan, but who cares? You can move the power supply away from operating
desk (very happy about this feature!) and besides, if you're concerned
about fan noise the amp will be most of it.

73,
Josh W6XU

On 5/1/2017 7:40 PM, Clay Autery wrote:

> It's a purpose built switcher, so they may have been able to use
> passive-only thermal management...
>
> ______________________
> Clay Autery, KY5G
>
> On 5/1/2017 9:05 PM, Charles Johnson wrote:
>> I’ve seen no mention of a fan inside the power supply cabinet of the new KPA1500. Anyone know if one is there and what might be the noise impact? Variable speed maybe?
>>
>>