OH heavens, the idea to transmitting into a "dead band" for an hour would most assuredly be considered a violation of FCC regulations. Yes, a dummy load should always be used for any type of testing.
As to fans, they either BLOW or SUCK, your choice. A fan with blades performs better sucking or evacuating a cavity while a centrifugal type blower or a fan with vanes will be better suited for pressure applications. In any event, all fans are noisy either due to tip speed of the blades or bearing noise of the motor. Convection or conduction cooling is much preferred. 73 Bob, K4TAX ----- Original Message ----- From: "K6LE" <k...@mac.com> To: "Elecraft Elecraft" <elecraft@mailman.qth.net> Sent: Monday, April 05, 2010 11:40 PM Subject: Re: [Elecraft] K3 Cooling > > On 4/5/2010, at 9:11 , Guy Olinger K2AV wrote: >> >> Snip >> As to how good the cooling is, just to see what happened, I let the K3 >> transmit at 100 watts for a half hour into a dead band. > >>> > > I wish you had said "In to a dummy load".. > > As an aside, it's amazing how many engineering papers a simple question > about which way the fans should be blowing in the OP's K3 can generate! > > Rick > K6LE > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
