I would make sure that you have no television sets turned on near the microphone as it sounds like you're describing horizontal sync? Does this always occur with the same microphone? There are so many variables that could cause this scenario, including fluorescent lights and light dimmers.

It might be better if you could include a clip with this high-frequency noise you're describing. It could be clock noise from your computer? This frequently occurs with low-cost sound cards and the reason for breakout boxes.

Stumped
Ms. Remy Ann David

Many thanks for taking time to reply Remy.. good thoughts. Don't think it's clock - going through a Digi002R. Always happens with same mic.
Think I'll spend some time doing comparisons of all mic/amp/channel/lighting combinations and see if I get anywhere. Will post clip if I get a good example. I hope I made clear that the noise isn't constant - it's more part of the recorded audio.
Cheers,
J

HI,

I have a similar problem with a K2 through an EMU 1616M.

A noise like a crackle it's present under the vocals and it's variable.

I can't attach here the sample as i see..

This is the second k2 .The first did exactly the same thing like the actual mike... after 2 weeks of use that noise appeared.

:(

This all makes me think that there is something about the K2 that isn't right? Transformer output or not a Transformer output? Not sure? It almost sounds like you're pushing gain too far? Although I don't believe you are? Perhaps it is a hot microphone and you should engage the pad? That would be my only thought? Hope this helps?

Totally bewildered
Ms. Remy Ann David

Could it be a bad tube? A microphonic microphone tube?

I had a similar problem on my K2. A quick call to Rode, 24 hours and a new tube later, I was in business.

Cheers,
J.

(Hey! That's how I sign!!! You can't sign that way! I've trademarked it....:-P)

So...this make me thinks that Rode had used some faulty tubes..

As i told you, this is my second K2. I've changed it completly (a new mic + a new transformer).

For sure it's not any link between gain and that noise.
Remy, i've sent you an e-mail with a short .wav sample of that noise.

The gain on my emu 1616 m was set at 1'o clock on the gain knob. That means almost 50-55 % This is my regular volume setting with the K2 over EMU 1616M.

novaradio wrote: So...this make me thinks that Rode had used some faulty tubes..

As i told you, this is my second K2. I've changed it completly (a new mic + a new transformer).

For sure it's not any link between gain and that noise.
Remy, i've sent you an e-mail with a short .wav sample of that noise.

The gain on my emu 1616 m was set at 1'o clock on the gain knob. That means almost 50-55 % This is my regular volume setting with the K2 over EMU 1616M.

Possibly. The tube that was in there was a Chinese, unbranded tube. The tube they sent me was an EH. EH wouldn't have been my first choice, but considering it was a free warranty replacement, I wasn't going to complain!

Other than that, I've had nothing but positive experiences with my Rode! (Even that situation was positive considering how they handled it!)

Also, the gain position is hard to tell (whether it's 50-55%). If it's a linear taper pot, yes, this would be the case. However if it's an audio or logarithmic taper (which I'd bet it is in this case) this wouldn't be the case. It would be more like 28-33%.

Cheers-

J.

Well tubes can be delicate without being faulty. If your UPS/Fedex/DHL/USPS delivery person has a heavy hand, there is not much that Rode can do about it. BTW I have a K2 and no problems so far (knock wood).

Has anyone out there swapped tubes on the K2 just to experiment with sound? I used to frequent guitar boards where people would argue like crazy about the qualities of various tubes. Don't hear the here. Maybe because with guitar amps you are concerned with the nonlinear "failure" mode of the tube while with microphones you are working in the linear range.