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Any good wireless mike systems at reasonable cost?

Discussion in 'Electronic Design' started by Joerg, Jun 13, 2004.

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  1. Joerg

    Joerg Guest

    Hi All,

    This one is more for our church. I am just looking around for possible
    alternatives here. Does anybody know a good wireless microphone system
    that works digitally, maybe in WLAN fashion? It should be in the $2-3k
    range for a setup with two lapel mikes and two handhelds.

    The reason I ask is that many analog versions are not great designs at
    all. They produce a loud pop whenever someone turns off their mike,
    sometimes even when activating the mute switch. Poor squelch design I'd
    guess. Others produce a tremendous noise when someone turns a light switch.

    Battery lifetime for a mike should be at least five hours, better six or
    seven. So if you have a great system at your church or somewhere else,
    could you peek into the audio room and post what brand and model it is?

    Regards, Joerg
     
  2. Nico Coesel

    Nico Coesel Guest

    At a former employer of mine we always sold Sennheiser to churches
    because we found out their wireless mics worked best compared to other
    brands. Their most recent models also have a reasonable price. The
    battery life shouldn't be an issue for todays high capacity
    rechargable batteries, but the trick is to charge the batteries
    properly in order to keep them 'fit'. Finding a good charger (which at
    least discharges the batteries before charging them) can be quite
    difficult.
     
  3. Joerg

    Joerg Guest

    Hi Nico,
    The larger system we have is a Sennheiser but it pops loudly when
    turning off mikes. Maybe the newer ones are better but we'd make a
    purchase conditional upon that. EMI is pretty good on that one. Battery
    life, well, isn't so great. It needs 9V batteries and even with the
    largest cells (250mAh) it barely gets to five hours. That's tight for a
    Sunday morning with 1st service, immediately followed by bible class and
    then 2nd service. There isn't much time to change batteries.

    Also, these use UHF channels as secondary users. Works most of the time
    but it can become a problem every time some station is allocated a new
    digital channel. Best would be a wideband spread spectrum solution,
    preferably at 5GHz where it isn't so crowded yet. It can't be so
    difficult technically since we can by wireless phones for 5GHz and they
    sell around $150 for the base station including two additional handsets

    A really simple fix for battery life would be to design a "pop free" RF
    turn off and then switch off the whole mike instead of just muting it.
    In mute mode it still drains the battery. Can't be difficult to design.

    We did find an excellent charger. It is the Ansmann "Energy 16" which
    has an elaborate uC scheme to prep, charge and trickle each individual
    battery. So we've got two of those now. This was the only one for our
    specs I could find after a pretty exhaustive search.

    Regards, Joerg
     
  4. The "best" solution is simply to cut the bible class and the 2nd
    service. Its all made up fantasy so nothing will be lost:)

    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.
     
  5. Joerg

    Joerg Guest

    Hi Kevin,
    It is not fantasy at all. Many, many times archaeologists have said the
    same, for example claiming that the city of Niniveh really never
    existed. Until they found its remnants way below the soil, at exactly
    the spot where the bible said it was...

    Regards, Joerg
     
  6. Of course it is. Religion is entirely made up. The stupid, peasants, of
    a few 1000 years ago, who knew no better, simply said, well, a man, who
    knows, everything, can do anything, and is everywhere at once, made
    everything. Like, get real dude.
    This has nothing to do with my point. That is not religion, that is
    history.
    So what, even if true. For starters, is amazingly how "round about 100
    miles" ends up as "exactly".


    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.
     
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