Re: mic preamp modification

Hello Graham,

Noisy 48 volts ? I like to keep the noise on my phantom power supplies down to
a few hundred microvolts ( audio band ).

In these cases it was proximity to switchers and the phantom supply picked up noise. The electrolytics were, well, bottom-of-the-line garden varieties. After all, had they used the Philips caps which I put in or another good brand the profit margin would probably have plummeted from 98.5% to 98.4%.

When I talked to the (stunned) audio people about what else had been done and I mentioned ferrites all I got were those deer in the headlights looks.

Regards, Joerg

http://www.analogconsultants.com
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