Velleman projects K1803 Assembly instructions - Manual (Page 6)

6
8. Connection
Connection
Connect a stabilized supply between 10 and 30V with the points “+” and “-” on the print.
The input is connected on the points “AF IN”.
The output is taken on the connection “AF OUT” and the ground “-”.
To connect your in– and output you’d better use a screened wire, this to avoid interferences and rumble
With the trimmer RV1 you can control the output signal between 0 and max.
Connection example
Dynamic microphone
Telephone pick up coil
...
MAX. 40mV
To : Amplifier, Mixing
panel, Tape recorder, ...
10 ... 30VDC
INPUT
OUTPUT