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OK, so I accept it is impracticable on a condenser mic - the broader question for me is? - What is the upper limit of input impedance where a diode ESD protection scheme can work effectively with

Too expensive for me. Also I bet the interior would require too much rework or a new custom frame to hold a different capsule and circuit board.

Am 06.10.24 um 02:35 schrieb Richard Lee via groups.io: More like 10 years or so. But the board has been exchanged by MOTU, a few years ago. Ralf -- Ralf R. Radermacher - K?ln/Cologne,

BAV199 are suitable for mike preamps like THAT 1512 but are too noisy for condensor mike stuff.? You want something like Ir 0.2pA.? There's nothing spec'd to that level as its very temp.

How would you know when it's done its job? just the noise levels? If I have a build where the protection diodes are not replaceable separately from the fet they are protecting, what specifications of

Thanks Richard this is setting me on the right track, but I have more questions... yes, I think it is degrading my noise levels even at the <5M input impedance of the circuit I linked to. no space

All P-N junctions become noisy under circumstances, particularly when they're driven in their Zener region. I would say that a diode that has done its job of protecting a low-noise circuit should be

Hi use xlrs pin 1 shield longer than 2 and 3 pins earth contacts first....

How many months have you had your Traveler Mk3? Can you open it up and tell us what diodes it uses on the mike amps?? They are large and pretty easy to spot.? Should be 4 on each input near the

I’m using the diodes am as this is text book protection for opamps Can’t speak to FET’s or a >10M input impedance Best Regards, Jules Ryckebusch

Am 05.10.24 um 23:04 schrieb Richard Lee via groups.io: Never noticed anything like that with my traveler MK3. Then again, I use it mostly for recording... errr... noise, i.e. street scenes

Dunno about piezo amps @ about 10M but for a LN condensor mike over 1G, the diodes must have VERY low leakage. 1n4148 far too leaky and noisy.? Guru Scott Wurcer liked a smoke alarm FET used as a

thanks. So it works with a 1M input impedance. How high input impedance can you do this before diode leakage starts messing with the fet bias or lowering the input impedance? BTW I have built the

Has anyone here tried either of these dynamic mics from AliExpress? Fifine K669D Maono PD100 They look like solid bodies, I'm curious if they come apart easily and how good they would be as donor

Yes!!! I just did this with my piezo buffer for my hydrophones. You need Shottkey diodes. See this https://www.jlielectronics.com/content/Hydrophone%20Circuit%20Design%20Update.pdf Best

I hope this is OK to ask here as it isn't exclusively a mic question but a general electronic question that might be applicable to some mics. Consider a fet input with a high impedance, that is

It's so obvious with hindsight . . . Mea culpa, . . . ________________________________________________ NO WORRIES, old man. Just use your Daily MULLIGAN and all is instantly forgiven and forgotten

Jerry (and pmfalcman) is (are) of course right. By all means measure your P48V and 9V before doing the arithmetic.? Da P48V is specifically important as many so called Prosumer 'P48' devices may be

A more elaborate answer would take several pages of discussion, so "yes".

Jerry - so, I understand, your answer to my question is: "It doesn't matter" Right?