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mstrong82 wrote: What an interesting offer! Personally I'd be interested in some with larger diaphragms, say 1/2", to increase the SNR above the molecular shot noise and in directional models of the

the rf mic circuit is floating on the net - it is primarily of the sennheiser 405 mic. i have it on my files but i do not remember where i got it from. i suppose you could take a regulation electret,

certainly. i too would be interested in half a dozen half inch cardioids to build some directional mikes. umashankar _________________________________________________________________ Sports buff? This

mstrong82 wrote: Further thoughts: while the default configuration probably should remain common source, it would be nice if the design had the modification to two wire source follower topography in

i would like to see a capsule without the fet. that should make it possible for many more design ideas - a low noise fet opamp for instance, bootstrapped, might work. umashankar

For my applications I agree a larger diaphragm of 1/2" would be great and going much larger one starts to worry about condensation and humidity in outdoor recordings. There is a growing number of

umashankar mantravadi wrote: Yeah, I'd like them for a DSP based DIY Ambisonic mic and the fig 8 for a M/S mic. For the M/S I could live with back to back cardiods for S but its more circuitry. The

The BSE's with the NS preamp chip in them are OK for the big volume aps like cell phones. I can put them in ECM's but have to ask myself, why? Eventually NS or someone will make these with good specs,

12.7mm is 1/2". We can look at that. We can make anything makeable, HOWEVER 6mm or 9.7mm is what we run all day, every day. That is where it is realtively easy to slip in something special or

Bob, I couldn't agree with you more about "A collaborative design would be a great inauguration of the new group." I was here a long time ago and dropped out. I am constantly pestered by steath mic

OK - the whole point for me is to help people play wih microphone stuff and make their own inexpensive, probably better versions of stupidly expensive microphone products, besides I'm so bored making

This is a fit for something I want to make. I want to make a mic for tracking wildlife. I want to make it so you can hear the faintest, furthest away sounds. Anotherwords, I want to crank the gain up

Hi, Adumb Gilligan Concussion wrote: Plus 48V phantom power is coming from HOT (that's where it got it's name). Which would result in a system with quite a bad common mode noise rejection... For

Remember that for 6mm range diameter capsules, the FET is not the predominant noise source, and the modification to allow source-follower operation does a pretty good job at linearizing the internal

I guess I am the SPAM safeguard right now. Shortly, the group will be switched to a "restricted membership". Groups of this type get little or no spam. I will review e-mail addresses of new members

you can hear the gain up to work with. I One problem, IMHO, with the panasonics is the size of the hole in the front. It is too small and can reverberate under extremely loud sound pressure levels. If

I am uploading some photos of designs i currently use. Upload in progress as I have to find some of the photos. I will get to my electrical designs with time as this is a work in progress. 1. Clear

mstrong82 wrote: That's just what I thought. :-) No, it is changing the configuration of the internal FET to source follower from the as-shipped common source mode. This involves cutting a trace on

mstrong82 wrote: Yes, I understand that the larger you make it, the more specialized the market becomes. It's just that my interest has moved beyond tiny but noisy omni's toward much quieter first

mstrong82 wrote: As Jerry Avins in comp.dsp is so fond of saying, "Engineering is the art of making what you want from what you have." To that end I have worked out testing and characterization