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As always, thanks to Jules and all to share and help others in this nice Group :) I will try the?JLI-160A11UC680, but *I don't see any info about the Noise Levels/self-noise.* The primo EM200/204 is

Indeed. Also I would have liked to have an explanation why teh capacitance changes non linearly. Of course, increasing bias voltage tends to bring the diaphragm closer to the backplate, which

Not so much misleading as just not very relevant to the sort of mics we usually build here, for all the reasons you say. What isn't clear is why the frequency affected is around 8k rather than some

section 3.9.1 and especially figure 3.7

So right Matt. They do say that graph is for a 1/2” microphone. And that it varies with diameter. But we are not doing 28V to 200V either. Best Regards, Jules Ryckebusch

That graph is misleading. The voltages pictured are 28, 150, 250. Those values might be appropriate for a small diaphragm measurement capsule. Large-diaphragm capsules such as most people here would

What section are you referring to?

I've almost always received something that basically met the description, though sometimes faulty or poor quality. Fingers crossed i'll get something usable. In this case there was no description

hmm that info in that book raises more questions than it answers! Such as what determines the size of the frequency effect for a particular capsule, and what determines the frequency that is affected.

Most TSB-2555 circuits do not use any polarization voltage, because the capsule is pre-polarized. That is, in most TSB-2555 mics, there is no polarization voltage to reduce, so the only easy way to

There is a debate on padding with polarising voltage vs capacitance addition. See page 96 of this: https://www.bksv.com/media/doc/be1447.pdf They show about +/- 2-3db for a pretty wide range. We have

The problem with chinese is that you know what your order but you don't know what you'll receive.

Yes. I can't say the difference is spectacular, but rather good.

regarding condenser pads. A compromise solution in a large condenser is to use a dip switch or other small switch internally.? Then you can defeat the pad by taking the cover off and switching -

I've been tinkering with this for a bit and wanted to share. I padded my OPA Board with a 220pF cap across the 1Gig resistor and measured. I am getting about 15db padding and it works great on drums

The cheap chinese dynamic capsule I have is 450 ohms. Presumably designed for use without a transformer. So the ones you mention are significantly different. Definitely worth a try for the price. I

Very true. I’m going to try and do some testing. I’m thinking for the 25mm ones the chance is less for bottoming out but… Neumann claims 147db max SPL in one their LDC’s with pad engaged. Best

yes I'm also wondering which of my many existing condenser mics would make good drum mics with a pad added. Or that i can build from the spares I have on hand. Those cheap 25mm OD brass electrets from

The pressure effects are not at all frequencies, since a drum head is tuned. Directionality will still be there for transients and other important information. -Scott Sent from a mobile device. Please

Ive been working on some drum mics from modding my builds and a sub kick. Originally I thought I would need a transformer on the 6.5" woofer I was using. Turns out I don't just wire straight to the