Posted by Ed Muns, W0YK on May 13, 2009; 3:03pm URL: http://elecraft.85.s1.nabble.com/K3-KPA3-Fan-Upgrade-Question-tp2883346p2885052.html
You're doing what?!
For two years I've run my K3s in NAQP at 100 watts with high duty cycle. The fans seldom turn-on and the PA is barely warm. If you can out-design N6KR, I'd be amazed.
Ed - W0YK
------Original Message------
From: Brian Binkley
Sender: [hidden email] To: [hidden email] Sent: May 13, 2009 07:11
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?