"Larry Pint" <lpint@[EMAIL PROTECTED]
> wrote in message
news:QdOdnXBa1s36ukvbnZ2dnUVZ_sOrnZ2d@[EMAIL PROTECTED]
> I'm trying to help out my local Middle School. They inherited eight
Nady
> Platinum series 802 UHF wireless microphones from the High School. They
> were purchased in 1998. While they are getting a little old, they
really
> only get used for about 10 perfoamnces and 10 rehearsals a year, so they
> haven't seen much use. I don't think they're worth much and the school
has
> little or no money to repair or replace them. That's why I'm trying to
help
> them.
>
> I work with a local community theatre and the High School also,
primarily
> with lighting their plays. Since I can at least spell "audio", I'm as
close
> to an "expert" as they've got. (So, boy are they in trouble!) I hardly
> even know enough about microphones to consier myself dangerous. So
please
> excuse my ignorance.
>
> I was able to get one transmtter/receiver pair working well enough to go
> through all the microphone cables and make sure there were no broken
wires,
> a common problem with these things. I did quite a bit of re-soldering
and
> even replaced a few connectors.
>
> The problem now is that most of them still don't work. There are only
two
> adjustments that I can find that are labeled and I'm willing to "play"
with,
> the "gain" in the transmitter and the "sensitivity" in the receiver.
>
> I started by setting them as the manual says they should have been from
the
> factory: gain set about mid point and sensitivity turned all the way
down.
> With the sensitivity set low, no amount of gain gets me a signal to the
amp.
> If I turn the sensitivity up, at some point it jumps from no signal to a
> constant screech. Feedback? I suppose.
>
> Sometimes I can get the sensitivity set right at the border between
nothing
> and screech. Then the signal cuts in and out.
>
> Since several are doing the same thing, I'm thinking it's some
adjustment
> that I don't know about. Anybody have any suggestions or steps I should
> follow to help me resolve this? Otherwise they'll probably just toss
them
> out.
>
> Thanks,
>
> Larry Pint
> New Prague, MN USA
>
>
Before I can answer I must ask a few questions.
Are these Handheld units or body packs / Lavalieres?
Where are receivers located in relation to the transmitters?
These receivers have diversity antennas. Are the antennas oriented about
90
degrees apart? Do you have direct line of sight to the transmitters?
Are you aware of a squelch control on the receiver?
These receivers have both line level and mice level outputs. If you are
feeding line level into a mic level input I would expect to encounter
overload, feedback, and distortion.
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