One voicecard louder at the mixer out

Discontinued products Ambika
#1

Hi,

this is my first post in this forum. My names Benni, I’m from Germany and study music.
First I’d like to say thanks to Olivier for providing the full Ambika-kit with all components. I’m not very comfortable sourcing parts, so this was very convenient.
Sooo I’ve assembled all the things and I have a little problem. One voicecard ist way louder than the others at the mix output. I checked the voice outs and there are all levels of all voicecards roughly the same. The level of the five voicecards combined (mix out) is rather quiet, I have to crank my input to get enough signal. The one louder voicecards level (mix out) is nearly the same as from the voice outs.
I don’t know how to troubleshoot so I would be very grateful if somebody could help me.

Thanks.

Benni

#2

I had the exact same problem. Check every solder point of the voice card. You probably have a weak solder point on one capacitor or a too long solder joint that touches another voice card. You can also reheat all solder joints :slight_smile:

#3

Are they all the same type of voice card?

#4

Check the part placement, it’s easy to mix up a 4.7k part with a 470R or 47K and brown, red, and orange sometimes can look the samme

#5

Thanks for the fast responses. I checked the parts as you suggested.
And I just found the problem: I reversed the resistor network RN1.
Whats the best way to unsolder it?

#6

Cut it in parts and put in a new one. You can also replace it by normal 10k resistors.