Re: [nfc-l] noise with OB21c microphone + solid state recording using AC power

2018-09-20 Thread Magnus Robb
Wim, I don’t know if your Marantz accepts external USB power. If it does you could buy a high capacity powerbank (say, 2mAh or more), connecting it with a USB cable, and that would probably solve both problems: autonomy and noise. all the best, Magnus Robb > On 20 Sep 2018, at 00:13:39,

Re: [nfc-l] noise with OB21c microphone + solid state recording using AC power

2018-09-20 Thread Magnus Robb
Wim, I don’t know if your Marantz accepts external USB power. If it does you could buy a high capacity powerbank (say, 2mAh or more), connecting it with a USB cable, and that would probably solve both problems: autonomy and noise. all the best, Magnus Robb > On 20 Sep 2018, at 00:13:39,

Re: [nfc-l] noise with OB21c microphone + solid state recording using AC power

2018-09-20 Thread Wim van Dam
Thanks everyone for your suggestions. Chris was right: I needed to ground my recorder. The buzz stopped as soon as I wired the headphone jack to a gas pipe in my house. While my Marantz PMD661 is a nice recorder, it apparently is not designed to be powered by AC while getting its signal from