[Elecraft] KPA-500 Running hot on 20m

[Ron D'Eau Claire]

With an adequate sized heat sink, one could build a legal-limit solid state
amplifier with no fan whatsoever, but the most Hams want physically smaller
equipment even if it requires cooling fans. It's not bad engineering. It is
good engineering coming up with a product the buyer wants. 

I know that Wayne went to some effort to make select K3/ K3S fans that are
as quiet as possible while still providing the needed airflow for high
duty-cycle modes. 

The KPA500 demands far more air than the K3/K3S. 

The only really silent fan is no fan at all. That's something most QRP
operators enjoy. 

73, Ron AC7AC


-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ignacy
Sent: Tuesday, January 10, 2017 8:19 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA-500 Running hot on 20m

I wrote an article on fan noise including in amplifiers. See
http://www.eham.net/articles/38328. 

Ignacy, NO9E 



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