On Mon, 14 Jul 2008 07:22:42 -0700, David Yarnes wrote: >I'll add my displeasure as well with regard to Heil headphones.
I don't know anything specific about Heil headsets (except that the electronics in some that I've used at contest stations have bad RFI problems). I work in the pro audio world, and my ears are nearly 67 years old. In other words, I'm an EE, a trained listener, and I've got some hearing loss, like anyone of my age. I own several types of pro headphones, all of which work VERY well with every ham rig I've ever plugged them into. They sound good, are plenty loud, are well built, and are comfortable to wear through a long contest weekend. They are the Etymotic Research ER4, the Shure E3 and E4, and the Sony MDR-7506 and MDR-V6. The Shure products are designed for use by musicians on stage, and have recently acquired new model numbers to avoid confusion with competing products. There is a more detailed discussion of audio and headphones in one of the appendices of my tutorial on RFI, ferrites, common mode chokes, and audio interfacing. http://audiosystemsgroup.com/RFI-Ham.pdf Another ham recently noted in a private email that he had tried a set of specialized earphones with a peaky response supposedly tailored for "communications" and found that they rang very badly. That doesn't surprise me. Good communications headphones should have flat, neutral, accurate response with minimal distortion and phase shift. The human ear/brain does not like peaky response or phase shift. We have plenty of it our radios, and designers of those radios work very hard to make it well behaved. The last thing we need is more of it in our headphones. 73, Jim Brown K9YC _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
