> It seems pretty clear that the early fans were indeed > silent, certainly the > same cannot be said of the UTEC ones in my #980. Gary > kindly even sent me > some more but the difference was negligible. I have spent > a lot of time on > this, even mounting the fan panel on rubber bushes - all > to no avail.
That isn't surprising. Fan mounts, although people really like to mess with them, almost never have a noticeable effect on noise. Other than the design of the fan itself, the number one thing that affects noise is having an object near the blades (especially out near the tips). Restricting the airflow also doesn't help. The worse thing to do for a given amount of restriction is place it on the fan inlet. I haven't played with a K3, but cutting some thick spacers to move the fans outward from the PA might be worth a try. Cheap sound meters are readily available, and a good way to test. 73 Tom ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
