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It will be something like this: [image: image.png] R12 will need to be calculated, so CVCC is 1.5V. Regards! HL El jue, 27 jul 2023 a la(s) 06:57, Jerry Lee Marcel

Actually, it is quite possible to connect a capsule with internal FET to an Alice circuit. It takes to power the capsule, which just requires two resistors and one capacitor, then use a capacitor

The simple P48 works really well with those capsules and the TSB2590. It has a couple internal RF EMI caps that make all the difference. Best Regards, Jules Ryckebusch

Thanks Jules. Can you suggest a similarly low parts count circuit that I could use with these JLI capsules? The skinny black china electret boards work but for some reason this batch are noisy, not

You don't want to remove the internal fet. (unless you are gifted mechanically) The OPA board is meant for FET-less capsules. try it with the China Gold capsule you have or a TSB2555B Jules --

Hi everyone. I've been playing around with a few DIY mics and have successfully mated an China gold 25mm capsule and k596 FET to a modified(per Audioimprov's great site) China electret-to-P48 board.

Not really. The audio signal stay constant. A strong hiss starts after one second and get constantly quieter, but it is still noisy. I just recorded a sine wave with it. I know the Humm is because of

Does the audio signal level varies accordingly? This would be to be expected.

Thank you Jules and Jerry for the replies. I'll try both suggestions and observe how the noise changes. I'll also take a deeper look into the Alice circuit. As you mentioned Jules, Simple P48 works

There is nothing wrong, except maybe the voltage across the capsule may be a little too high. I suspect there is about 7-8V , which is much higher than the specified 3V.across. You may try to increase

That should work as I now see the FET in use is the internal FET. You are kind of reinventing the wheel here. This should work but I would take a look in our files for the Alice circuit as that is a

Here the actuall schemos. Just edited the last ones to make them undestandable. Thank you all for your time :)

Well, both these schemos don't show how the capsule is connected/biased.

Thanks for the reply Jules, I was planing on shielding the circuit with an donor mic body as the last step. And also planing to use this mic in the nature :) Would you recommend to just change the

?You show no shielding around the whole circuit. That capsule also has a built in FET. The circuit you show is designed for a Fetless capsule. One final note. The Primo 264 is known for

Hi Yoshimi, Welcome to the group! Do you have a schematic you could share? Thanks, -Scott -- ---- Scott Helmke ----scott@... ---- (734) 604-9340 ---- "I have ce

James, thanks for the Takstar demo. I am yet again reminded just how darn good many electret mics are these days. :-). About the only other feedback I'm after is the mic noise when used with a good

Interesting idea with the closed cell foam, though it might affect heat dissipation in some components (admittedly the current is low so there isn't too much concern as long as the components were

might try those Takstars. Any user feedback on how they sound? ______________________________________________ Good Day! I purchased a Takstar CM-60 microphone from a US-based vendor for $30 on eBay

Yay. This sort of answers the questions I had when I dissected my Boxing Day SYNCO v10 hypercardioid mi (