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What a lovely old meter! Japanese? As used by technicians during WW2? It's essentially a 1mA meter with series resistors selected by the voltage range switch, so that at the full scale voltage, 1mA of

" I'll see your vest and raise you a hard hat." And I'll wave you back, mate. ;) " I used to joke how if you put on a hard hat, hi-viz vest, steel toe boots, and carry a clipboard, you could probably

Hi Henry. Thank you for your detailed answer! You pointed it out very clear that my meter can’t measure the voltage across the capsule with any accuracy and why. Many thanks! The meter is like an

Ha! Funny you should mention the hi-viz vest. I'll see your vest and raise you a hard hat. I used to work at an engine plant and had to go into construction zones regularly as part of the new model

I personally tested many electret capsules and if you don't need to listen to very high frequencies then EM272 easily reach 60kHz with a good sensitivity Iv

Not quite.? Analogue MEMs mics - like the one I referenced to - are unbalanced devices. I use the circuit here to interface a MEMS capsule with a phantom powered balanced mic input, to record bat

Hi Heinz, Troubleshooting electronics is a topic of interest to any mic builder. How to interpret your meter test result using Ohm's law: Battery measured directly = 6.47V Measured with .542M in

These are not microphones. They are just inductivecoils that pick the radiated magnetism.

Can MEMs be powered in a similar way to the "Simple P48"? [email protected]> wrote:

Hmmm... a guy named CASEY talking about trains ... yeah, that works !! :-) What about a contact microphone like we used to use with telephone handsets? Or a past-on guitar or instrument pickup

Hey, Mark. I got this same idea (contact mic + trains) but unpopulated PCBs still lay around and look at me accusingly. The idea of guitar pickup seems great. As already mentioned above the rails may

Using Henry's procedures, you've been able to establish that the impedance of your meter is around 1M, not 10M as I had originally suggested as a possibility The 35% reduction in voltage measured at

Hi Mark It depends on who you talk to. I hope it works out and you succeed! Maybe you should ask Gibson for a set of classic pickups as well. I'm not kidding. ;-) Your story reminds me of a night

Am 31.10.24 um 00:43 schrieb Mark Day via groups.io: Don't. They have more than enough trouble already with people taking nude photographs of their girlfriends on the tracks. Railways and trains are

Good point about the rails not moving much through the magnetic field. I was actually planning on approaching the company who owns the spur line near our house and asking permission. My mentor in

I will try, but it will take some time. Many thanks!

Can you check the various voltages circled in red in both cases?

It really looks like the problem lies elsewhere, since bias voltage is correct in both conditions. If the capsule was leaky you would have significantly different readings.

Hi! I measured? the voltage at each end of the 4704 resistor and the capsule voltage in the working and non working state (viewing from the photo). When the NT1-a is in the warm-up phase (not

Hi Henry Many thanks for link and the detailed instructions! I bought the Mastech MAS830 in a real electronic shop about 35 years a