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Good Points - I just ran across your paper on using wireless microphones. Thank you for putting this out there - the more information and knowledge, the better. I agree with almost everything in the article, but I wanted to make two points:
1. Rechargeable battery technology has evolved considerably in the past 10 years to the point where these can be used with confidence today. Rather than warn everyone away from using them, it might be more useful to encourage people to do some tests for themselves. The main thing to consider when using rechargeable batteries is "battery management". This is the process of purchasing, labeling, using, recharging, and ultimately disposing these batteries when needed. Higher capacity batteries won't take as many charges. I personally recommend disposing rechargeable batteries once per quarter. This will still save an enormous amount of money vs. disposable batteries.
2. Modern UHF (and even good-quality VHF) should not be affected by fluorescent lights, motors and the like. True - very inexpensive systems might be. The only real sources of interference for good-quality wireless systems are: other transmissions in the band, including TV and other wireless, and intermods from these same sources.
Yep - You see these pictures right. We found these wirelesses stacked UNDER a pew in a church.
Secondly the spectrum of frequencies that these systems operate on has become increasingly crowded and more complex. Wireless microphones now share many more sources of potential interference from digital television (which now uses essentially 100% of its allotted range) to wireless personal in-ear monitoring systems and this is only going to get worse if the FCC lets consumer electronic manufactures into our current white space as has been proposed.
It is more important than ever to carefully consider your wireless requirements with a professional and not to impugn the integrity of your local radio shack, music store and ebay searches but they just do not qualify as a wireless professional. You can still end up with issues no matter how hi-tech or expensive your hardware is if it is deployed or set-up improperly. The best choice you can make in a wireless system remains not in what gear you buy but from whom you get your advice.
Again, thanks for the good article, and also thanks for considering my points. Sincerely, Karl Winkler Lectrosonics, Inc.