Oktava MK-012 and Tascam DR-40 Issues at DVinfo.net

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Old October 19th, 2011, 04:30 PM   #1
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Oktava MK-012 and Tascam DR-40 Issues

I got my Oktava MK-012 today. Sadly they screwed up and sent me the cardioid instead of the hyper-cardioid. All good though, they're exchanging it and paying the shipping at FrontEndAudio.com so I'm cool with it...plus it was only $295 shipped instead of $355+ like everywhere else!

Anyways...hooked it up to my DR-40 and get horrible noise and no actual sound to the DR-40 from the mic. I hook the Oktava up to my recording equipment (Presonus FP10 rack recorder) and it works perfect. I hook my SM-58 and Rode NTG-2 up to the DR-40, works perfect. Also my ATR3350 lavalier won't work on the DR-40 either. I don't know what the heck the deal is!

Anyone else have the same mics and have any issues? At this point I'm thinking the DR-40 has some issues.

EDIT: I'm an idiot. The MK-012 requires phantom power! haha. but still doesn't explain all the electronic noise I get from it and why the ATR3550 doesn't work with it but works fine in my other recording hardware.
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Last edited by Dustin Alcock; October 19th, 2011 at 05:45 PM.
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Old October 20th, 2011, 11:37 AM   #2
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Re: Oktava MK-012 and Tascam DR-40 Issues

Dustin, could you clarify for us?

Now that you've used phantom power, are you getting a signal from the Oktava? Is it a clean signal?
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Old October 23rd, 2011, 04:18 PM   #3
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Re: Oktava MK-012 and Tascam DR-40 Issues

Is it possible the DR40 does not generate a full 48 Volts of Phantom Pwr.? Can't find it in the specs or manual.
I don't know the Oktava 012's Phantom Pwr. voltage requirement, but as I recall, some AT condensers would operate with as little as 9V, (AT spec: 9-52V) whereas later models, required the 'standard' 48V. A lower than normal Phantom Pwr voltage could cause an increase in noise as well as other performance issues.
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Old October 23rd, 2011, 10:25 PM   #4
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Re: Oktava MK-012 and Tascam DR-40 Issues

According to the manual (p.48, p.102) the DR-40 phantom voltage is switchable between +24v and +48v. Factory setting is +48v.
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