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My favourite PNPs for the output stage are the Nexperia BCM53DS and BCM857DS. https://www.nexperia.com/product/BCM53DS https://www.nexperia.com/product/BCM857DS Double, factory matched pair. No more

You could but I highly recommend the simple P48 if you need to go really small. It works really well. Best Regards, Jules Ryckebusch

Can you use the opamp circuit with electrets with built in FETs? 07889727365 02036861372 3 Swimmers Lane Haggerston London E2

Heh.? Haven't looked that circuit in a while, I guess. 2N5087 is the PNP output stage. Same thing applies, though - probably a lot of transistors will work just fine, I've done this on other things

I was doing PF5102 to replace the on5087, but those are also EOL. You could just try collecting all the major specs from the PF5102 and plugging those into the search on Mouser or Digi-Key.? I don't

Sadly that one is obsolete with through hole ones still available. I’ve switched everything over to the OPA circuit. Best Regards, Jules Ryckebusch

Hi All, Happy new year (if it’s not too late to say it!) Any thoughts on SMD replacements (or improvements!) on the through hole 2N5087? I’m looking to squeeze eight or more circuits onto a

Could one of the following capsules that PUI released last year be a good starting point to DIY something? According to PUI’s new product announcement it states: These new microphones find

There's a BBC monograph about modifying a Reslo ribbon mic to improve the bass response. in the process of assessing the model they determined that the fine weave cloth gauze was contributing to lower

In case it isn't obvious, the 4104 is STILL SOTA for its job. Anyone interested to DIY something with similar performance? We want a cardioid or Fig 8 with REALLY CRAP LF response to modify so I'm

The coles lip mic used by football commentators is a figure 8 ribbon mic. the HF from the rear is actually better than from the front because of all the pop filters and spit catchers that are put on

It's really amazing what you guys can conjure up from the depths of the microphone builder drawer. I'm impressed and delighted! ? **** What I’m missing is that @cx b (clistburnham) didn’t

This might be a more permanent link: https://downloads.bbc.co.uk/rd/pubs/archive/pdffiles/monographs/bbc_monograph_07.pdf

This one? https://martinmitchellsmicrophones.wordpress.com/wp-content/uploads/2023/01/bbc_monograph_07.pdf

The definitive close range mike is the BBC designed 4104 commentator's mike ( https://coleselectroacoustics.com/4104-commentators-microphone/ ). This is a cardioid (IIRC) with a highly sloped

Some time ago I had a conversation with someone who was making a video about sewing, and wanted to include the actual audio of the sound of needles passing through cloth! They had been advised that

Due to the reverse square law, a useful signal will distinguish itself better from the background when going close to the source. That's the main thing. Radio people sometimes opt for dynamic mics.

Yes but that’s kind of different than having a physical distance limitation. I think most applications to accomplish what you may be trying to achieve use filters and gates. Like dynamic vocal mics

Yes, and so what? The sensitivity of a microphone can be altered by changing the preamp gain. Whatever the sensitivity/gain combination, the ratio between distant and close sounds doesn't

certainly there are "less sensitive" microphones, though, right? i suppose the most obvious example would be something like a piezo, where there would actually need to be direct contact with the