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Author Topic: M149 noise question  (Read 2452 times)

McPhaul

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M149 noise question
« on: August 20, 2013, 04:22:09 PM »

Our M149 has developed a noise when switching patterns. It has started making a wind-like noise for a few seconds as you move from one pattern to the next. It does this when moving from figure-eight towards omni, almost never when moving from the omni side towards figure-eight. If you move more than one position the noise lasts longer than if you move only one position but still settles after a few seconds.

What might be going on here?
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Will McPhaul
Real 2 Reel Studios
http://reel-life.net/

klaus

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Re: M149 noise question
« Reply #1 on: August 20, 2013, 08:42:33 PM »

I have never had an M149 on my bench that did NOT do this. Has to do with the polarization circuit of this model.
Read more here: http://www.neumann.com/forums/view.php?site=neumann&bn=neumann_mictec&key=1288681192
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com

McPhaul

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Re: M149 noise question
« Reply #2 on: August 20, 2013, 09:05:00 PM »

Thanks so much.

Over the last few weeks we have repaired several issues with it. Post repair we have been examining it with the proverbial "fine toothed comb" and noticed this noise. Normally when switching patterns and walking back to the control room the noise is gone before we can hear it. During our repair and examination process we noticed it.

We assumed it had to do with the polarization of the capsule, but didn't know if it was another component failing or not.
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Will McPhaul
Real 2 Reel Studios
http://reel-life.net/
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