开云体育

They look like typical Chinese K67 style capsules. You will want to implement some aggressive high-frequency rolloff in the circuit to correct the response of these capsules. Otherwise the microphones

Capsules arrived. Are these true condenser type? I was thinking going the pcbway and buy your pcb's, the Dual Alice and the Hex Inverter. 1st time on pcbway, they do 5 pcs by default? Do they include

This is great. And verifies what I was seeing with 220pF I had about 15-16db padding. You are showing 20db with 270pF. Thanks for doing this! Danke! mit freundlichen Grü?en, Jules -- Best Regards,

ok, the picture turned out pretty small, try it now as a pdf the cap values are 0, 100pF and 270pF

Thank you!!!! This is great Best Regards, Jules Ryckebusch

I measured the freq-response of a mic with Jules OPA circuit, TSB2555 and different values of the pad cap.

As Jules said above, I made some mics with a switch, but I also made some with headers (is this the right english term?) so I can change the caps pretty easy and experiment with different values and

I love the simpleP48. As Roger mentions the downside is the case is not at ground potential. Checkout out files area for R values of the various capsules we have tried. I’ve done the EM200. I have

Further to my post above, I should mention that if you need to interface an unbalanced electret - as used with TRS mini jacks for? PIP inputs - then I've found THIS SIMPLE CIRCUIT (

Two aspects of the 'Simple P48'? I had problems with when using it with an EM204 were: ? The EM204 is a 2 terminal electret. It's not possible to get at the FET source. As result the microphone

Hi Jon I know the question can be redundant but what's the difference between your schematic http://www.jp137.com/lts/EM204.Phantom.Interface.pdf ( http://www.jp137.com/lts/EM204.Phantom.Interface.pdf

They have a data sheet for it and it just lists S/N ratio as greater than 72db. I’m testing this head to head with the TSB2590 on Thursday. Will post results. Both are mounted in line on top of each

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