On 6/11/2019 12:20 AM, turnbull wrote:
Eric, I do not understand your problem with the PS and audible noise. The larger fans in my KPA1500 are quiet. Any noise is at low freq.
Do you work keydown modes at high duty cycles, like RTTY contesting or WSJT-X modes where high power is needed (6M, 160M, for example)? If you do a lot of meteor scatter or FT8 or moonbounce, especially on 6M where the efficiency is lowest, it doesn't take long for the fans to scream. And that's because they are small, which they must be to fit in the height dimension of the power amp.
73, Jim K9YC ______________________________________________________________ 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 Message delivered to [email protected]
