On 5/28/2018 11:24 AM, Ralph Parker wrote:
I ordered the '1500 In the quest to be a couple of instant db louder, but if I don't hear some resolution of the noise 'problem', I'm going to put the order on hold until it is solved. I do have many headsets which I usually wear, including the Bose QC15 noise cancelling model, but I'd hate to be FORCED into using them.
This is exactly one of the many issues that Acoustic Consultants address in the design of buildings that house recording studios, concert halls, and student practice halls in music colleges. I regularly worked with world-class guys in my own consulting practice, which only did sound system design, and I learned just enough to know that I shouldn't try to do their work. :) There are many elements to the design problem, and the fan itself is only one of them. Other elements I'm aware of is turbulence of air flow, mechanical vibration coupled from the fan to the structure to which it is mounted, where the fan(s) are located, and so on.
I don't know if one of them was involved with Elecraft, but if not, I'd suggest that Elecraft buy some time from one of them. And I'd be happy to provide names of some good people/firms. In the early K3 days, I referred a good acoustics guy to Wayne to solve the problem of acoustic coupling between the speaker and the synthesizer that added a sideband to RTTY, and suggested adding the stiffener to that board solved the problem and became a running mod.
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]
