Hi Klas--
I couldn't find the specs on the
self-noise/sensitivity on the primo em-21's. Do
you have an hands-on estimate? The built-in
mics/circuit provided in the H4 seem to have low
Hz cut. Are you planning to defeat this or do you
consider the low cut filter necessary? As-is, I
could not hand-hold the H4 at high gain without
picking-up a lot of handling sounds. Try
"silently" adjusting the rec gain and you'll see
what I mean.
The H4 with <20dB(A)? self-noise built-in mics
seems like a good rig for call/survey
documentation. Such a rig is probably not going
to bring home "sparkling" recordings from natural
settings. Spec-wise, an H4 with internal mics is
probably on par with MD Recorder and a Sony
ECM957 mic. An H4 used with phantom-powered >
16dB(A) self-noise mics might be a good rig for
louder settings. Rob D.
At 1:38 PM +0100 2/20/07, Klas Strandberg wrote:
>The Zoom with two EM21 works perfectly on extra power supply, but
>adds a audible 600Hz tone when the internal batteries are use.
>So now I'll try the condensors.
>
>Thanks Adam.
>
>Klas.
>
>At 20:25 2007-02-18, you wrote:
>>Klas,
>>
>>If you can fit surface mount caps between the rails, and have the
>>necessary solder paste and hot air soldering equipment, 1000uF 4V
>>tantalums are readily available in Europe from Farnell
>>(www.farnell.com) for about 45 - 68 Kr (about US $5-7).
>>
>>Thanks,
>>Adam
>>
>>--- In Klas Strandberg <>
>>wrote:
>> >
>> > Yes, it's an idea. But first we have to find out about the tones and
>> > clicks which it maybe still generates.
>> > Some people have added three 1000 mfd 4v tantal condensors over the
>> > voltage rail. This is easily done, but those condensors can only be
>> > bought in the US, they are expensive, and you have to pay some 100
>> > dollars to the courier.
>> >
>> > I mean - if modifications make the recorder as expensive as a
>> > recorder which is okay as it is, there is no point in making the
>>mod's...?
>> > Unless you really need a small recorder. As far as I know, the ones
>> > working well as they are, are quite big, like my new Fostex.
>> > And if you have to add an extra power pack to the Zoom, it isn't
>> > small anymore... life is awful...
>> >
>> > Klas
>>
>>
>>
>>"Microphones are not ears,
>>Loudspeakers are not birds,
>>A listening room is not nature."
>>Klas Strandberg
>>Yahoo! Groups Links
>>
>>
>>
>
>Telinga Microphones, Botarbo,
>S-748 96 Tobo, Sweden.
>Phone & fax int + 295 310 01
>email:
>website: www.telinga.com
> =A0=A0=A0=A0=A0=A0=A0
>
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
--
Rob Danielson
Peck School of the Arts
University of Wisconsin-Milwaukee
http://www.uwm.edu/~type/audio-art-tech-gallery/
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