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.

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?

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.

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