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noise related to mic powering...

Subject: noise related to mic powering...
From: "Gianni Pavan" gianni_pavan
Date: Wed Mar 21, 2007 6:38 am ((PDT))
Hi,
        I just bought two Sennheiser K6/ME66 with the hope to use them on
small recorders lacking phantom power (HiMD, Kork MR-1) or with bad
phantom (MicroTrack 2496). Unfortunately I had a bad surprise: when
powered by phantom the K6/ME66 works fine, but when powered by its
internal battery his noise increases above 8-10 kHz by about 12 dB
and a strong and large peak of noise (36dB higher than the
background) appears in the range 30-40 kHz. I have two K6/ME66, one
with peak at 32kHz, the other with peak at 37kHz. I exchanged the
batteries with no differencies. This makes them completely unusable
at 96 kHz and also at 48 kHz the noise increase is well appreciable
when running on internal batteries.
I'm VERY disappointed by this. I checked an old K6/ME6 (more than 15
years old) and it has a similar peak  but narrower and weaker with no
background increase; I also noted that both noise were higher in the
old model (something like 4-5 dB).

Now I'd like to know if somebody else has experienced the same
problem with Sennheiser or with other brands.

Gianni

Gianni
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Gianni Pavan
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universita' degli Studi di Pavia, Via Taramelli 24, 27100 PAVIA, ITALIA
Phone       +39-0382-987874    Fax +39-02-700-32921
Email      
Web       http://www.unipv.it/cibra
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CIBRA organizes the XXI IBAC Congress, Pavia, 15-18 September 2007
http://www.unipv.it/cibra/xxi_ibac.html
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