> --- "Mike Rooke" wrote:
>> First I suspect this mic is faulty, but would like to know
>> if anyone has experience low to high to low frequency sounds
>> (repeating) with the Rode NTG3 and Fostex FR2-LE (on max gain)
>> combination? An odd question since my other mics work fine yet
>> this new one may have some serious issues.
>--- "Grant Finlay" wrote:
> It could be "motor boating",
> basically it means that the mixer (or recorder in this case)
> is having trouble providing enough current for the mic. Several
> small mixers (ie: SD302) have this problem with various
> microphones.
Indeed. The NTG-3 mic is somewhat different from most condenser
mics in that it is NOT electret. It uses a radio frequency (RF)
to detect the mic element capacitance, and "receives" it something
like listening to an FM radio station. The theory of motorboating
caused by insufficient power seems consistent with the type of
microphone circuit.
I just got a new NTG-3, mostly for TV production, not for nature
recording. But so far I have not had any problems with the NTG3.
An inexpensive and reliable (although bulky) solution to phantom
power is to use five 9V transistor radio batteries in series. It
will produce 45V. Rode's NTG-3 specs claim that the mic wants a
full "48V Phantom Power (44-52V min 5mA)" so it seems relatively
power-hungry (compared to other mics like electrets, etc.)
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