Velleman projects K2572 Assembly instructions - Manual (Page 6)

6
Use
Ten connections are provided on the pcb to connect the print with a device. These connections are identical
to those of the RIAA preamplifier K2573 and in case you use the connectors included in this kit, you may
interchange the two prints.
The grounds near the Ins and Outs are used to connect the shielded wires (-) of the connecting leads. The
output amplitude of the right and the left channel are totally independent settable by respectively RV1 &
RV2. As current consumption is very low, voltage can be taken from any well stabilized power supply of 10
trough 30V DC. Lower the gain from 100 to 10 if the input signal is bigger than 50mV (500mV max), by
replacing R5 & R6 by 100K resistors.
Remarks : A nonwell stabilized power supply will give a noise and hum. The leads, from and to the print,
must be as short as possible and make use of shielded wires only. Never place the preamp in the vicinity
of transformers or net.
7. Use
1. Ground
2. Out
left
3. Ground
4. In
left
5. Ground (Power supply)
6. + (power supply)
7. In right
8. Ground
9. Out right
10.Ground
6
Use
Ten connections are provided on the pcb to connect the print with a device. These connections are identical
to those of the RIAA preamplifier K2573 and in case you use the connectors included in this kit, you may
interchange the two prints.
The grounds near the Ins and Outs are used to connect the shielded wires (-) of the connecting leads. The
output amplitude of the right and the left channel are totally independent settable by respectively RV1 &
RV2. As current consumption is very low, voltage can be taken from any well stabilized power supply of 10
trough 30V DC. Lower the gain from 100 to 10 if the input signal is bigger than 50mV (500mV max), by
replacing R5 & R6 by 100K resistors.
Remarks : A nonwell stabilized power supply will give a noise and hum. The leads, from and to the print,
must be as short as possible and make use of shielded wires only. Never place the preamp in the vicinity
of transformers or net.
7. Use
1. Ground
2. Out
left
3. Ground
4. In
left
5. Ground (Power supply)
6. + (power supply)
7. In right
8. Ground
9. Out right
10.Ground