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I was going to add - solder a jumper between pin 1 and the shield on the XLR to ensure the preamp casing and the cable shield are continuous. I have has to do this several times where a mic will

. . . I still hear the hum although it seems to be lower) . . . _________________________________________________________ Notwithstanding my rookie status, considering the fact the hum comes and

Thanks Jerry, I just assumed [I know it makes an ass of you and me] that as the specs were supposedly the same for the 172, that the 272 would be a straight swap in the circuit. I've just tested with

With 0.19V across the capsules, they operate far from their expected op point. Then it's not unusual to see degradation of performance. You must first find why the voltage is incorrect. The value of

Thanks, I remember reading that review a while ago, it rings a bell, but I checked it again just in case. And plugging headphones directly doesn't seem to have any noise, but I think it's just because

Apologies the PNG had alpha background so rendered wrong.

Picking back up with the Primo capsules. I managed to lose one of the EM172 in a gap in the loft floor, so bought some EM272s. Today I wired them up but there was a weird discrepancy of about

The driver is mentioned in the 3rd paragraph of your link: http://recordinghacks.com/microphones/Audio-Technica/ATR2500-USB ... it does not say "custom", and you're right, the manual only refers to

Ok, so just as a bit of an update, as I was getting ready to disassemble it I decided to make a few more tests. I connected it, and suddenly got no noise (after getting noise for hours yesterday). I

Thanks Scott. One of the tests I did was connecting my charger, but it made the problem a bit worse, which I also didn't understand, as the charger would be grounding the laptop, but I'll try directly

If that were my mic, I would take it apart, look for damaged or poor connections, especially connections to the case, and maybe for power rail electrolytic capacitors that could have failed. But I've

In general, USB mics do not hum, because the connection is digital. However, it may be that there is a floating ground connection. First, I would try another USB cable, then test the mic with another

It does sound very much like a *lack of* grounding issue. Laptop power supplies tend to be a bit dodgy with regard to grounding in the first place, but with nothing connected you have no ground at

Hello there, first message on the forum and hopefully this is the right place for this kind of questions. I have an *Audio-Technica ATR2500-USB* mic

The SimpleP48 while excellent in most other aspects, is very dependent on having absolutely clean phantom power if you need it to be hum free. Most mixers have some ripple on the phantom supply.

As Jerry has advised, reducing the capacitor reduces some of the deep bass. In some of my adaptors I've made that capacitance switchable so that I can drop some bass when it's excessive or

Hi Adam, Thanks for the updates. I mainly use my mics outside, feeding a portable recorder with XLR inputs. I also currently have two PUI AOM5024, wired as simpleP48, "permanently"mounted outside,

Hello Everyone, With the information I learned from this forum and elsewhere, I also tried a PuiAudio AOM5024 + SimpleP48 circuit. The recording noise is extremely low and the sound quality is very

Hello Everyone, Many thanks for feedback, I'll check everything again... These are what I did: 1. A Heat Shrink Tubing was covered the capsule (AOM5024) and the copper tape wrapped on shrink tubing,

-- Gesendet mit der WEB.DE Mail App Am 07.07.24, 11:28 schrieb "underwood via groups.io" <underwood.de.vu@...>: In some cases, hum is due to cheap or bad cables. A longer cable