Low output ribbon/ dynamic microphone phantom-powered circuit new information

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computerlen

Member
Joined
Nov 30, 2019
Messages
7
Here's something that I will do. I will send one of my working preamps by mail and at no cost to the person who needs one of these. How about that? Len in the Toronto area.
 

saxguru

New member
Joined
Oct 8, 2021
Messages
3
Location
canada
If 20db boost is OK then this is for you.

If you build this circuit I would really appreciate it if you would let all of us know the results that you get. I have built two and they work perfectly. You must use the fet transistors specified for the lowest noise. I have read that the gain is from 20-25db. Len.
[email protected] Thanks so much for this schematic.! Question- would it be better to put the 10p caps right on the jack itself for RF? I've seem tnis done with "pimped Alice" mods where it was suggested that they work best close to the jack. Also. where did you insert your blue LED? You said you used acouple of 1Mohm resistrs with that, and the LED had to be blue. can you elaborate? Thanks so much. Cheers
 
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saxguru

New member
Joined
Oct 8, 2021
Messages
3
Location
canada
I guess that you might say I was scared away. Some day I will tell you why. Anyway, I have built three of the circuits and they have surprised the people who heard the difference in gain level and low noise. I have added a blue LED connected via two 1 meg resistors-one each to pin two and pin three of the male XLR. It must be a blue or otherwise clear bright LED. I don't know why though. Len.
Do you have a circuit board drawn out for the circuit? Did you order circuit boards? Thanks for the schematic!
 
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