With stock fans, you shouldn't see more than about 64C on the PA TEMP reading (with 77F room air). The high temp warning, with KPA bypass, is set for 84C, so there is quite a bit of headroom.
If you really want to use your new fans, you could set config: kpa3 = Fn2. With that setting, the fans will never run at less than speed 2, but will speed up at the appropriate temp as the PA warms up. Dave Hachadorian, K6LL Yuma, AZ ----- Original Message ----- From: "Brian Binkley" <kd8...@gmail.com> To: <elecraft@mailman.qth.net> Sent: Wednesday, May 13, 2009 12:11 PM Subject: [Elecraft] K3 KPA3 Fan Upgrade Question > Hello, > > I am currently in the process of upgrading the fans for > the KPA3 100 Watt > Amplifier module because the heatsink temperature gets too > high for my > liking. I am upgrading both fans to a fan with higher CFM > output. Last night > I hooked both fans up to the KPAIO module to test and see > if they will work. > When I am on fan power level one, the fans try to but are > unable to start > up. I have to bump them to start them spinning. Power > level two has no > problem spinning them up. When I went to power level four > and then brought > the power level to one, the fans did not have any problem > continuing > running. The fan specs can be found here > http://www.sundialmicro.com/ipcqueen_dc_fan_606010_ball_bearing_3pin_2033_1199.html. > Is there any components that I can add in line to provide > the necessary > power to start the fans up at power level one? > > > Thanks > Brian Binkley > KD8CPF > kd8...@gmail.com > ______________________________________________________________ > 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
