At 7:24 PM +0000 1/9/07, sveinung_nygaard wrote:
>The RH1 is on batteri, the Art2 is running off battery, the 828 is
>on mains. The miccable is
>good, I use it all the time. The mic is fine too. I am running a
>longish unbalanced cable
>from the outputs of the 828, so that might cause some noise. The
>funny things is when I
>used the preamp
What preamp? The art II is a phantom power supply. The output from it
goes to a mic level input.
>on the 828 with all the same cables attacheds it was like I was able to
>breath again (almost no noise). And, this noise I have problem with
>is the same as the one
>I get when plugging a Sony ECM-MS907 into the RZ1 but not having
>turned the mic on.
>This is what suggests to me that the preamp has some noise in it. I
>also get the same
>noise plugging an ordinary cable into the preamp input.
There are line and mic inputs on the Hi-MD. The Art II output goes to
the (red jack?) mic input on the Hi-MD. Rob D.
>
>*S*
>
>--- In "stoatwizard" <> wrote:
>>
>> This sounds like there is a fault. Neumann quote the sensitivity at a
>> decent 23mV/Pa and a self-noise of 7dBA, so the RH1 preamp noise costs
>> you about 2dB self-noise.
>>
>> When I had one on loan to test the noise floor of the RH1 driven by a
>> 180R resistive load had a slight hint of hum, which I suspect to being
>> due to the OLED display which has a 100Hz refresh rate.
>>
>> One question - are you battery powering the phantom unit (ie there
>> isn't an earth loop with the phantom powering), since the RH! is not a
>> balanced input, so the phantom unit and mics should be fully floating
>> if possible?
>>
>> --- In "sveinung_nygaard"
>> <sveinung.s.nygaard@> wrote:
>>
>> > I might be mistaken, but it seems to me that the mic pre on the Sony
>> MZ-RH1 is very noise. If
>> > anybody cold lead me on the right track I would be very thankful. I
>> have one of these
>> > recorders, and I tried comparing it to the preamp on my MOTU 828 mk2,
>> and the mic pre on
>> > the sony recorder has a lot of high frequency noice on it. I used a
>> Neuman TLM103 with
>> > phantom from a ART2 box. It was all done indoor to check the
>> noiselevel (very crudely!). But
>>
>
>
>
>
>"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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