A low-noise integrated circuit was added and the preamplifier was made in the stereo mode. This amp is without RIAA correction.
Technical Specifications:
Power supply : 10 trough 30VDC maximum, stabilized
Current absorption (w/o charge): typ. 5mA
Amplification (settable): 40dB
Frequency range: 40Hz through 30KHz - 3dB
Output impedance: 1 Kohm
Maximum input signal: 50mV (500mV)
Gain and power requirements: 10-30 vdc source, <50ma
Gain is 40dB, 100X.
Parts List:
Label |
Reference |
Qty |
Description |
C1 |
10A0F |
1 |
ELCO AXIAL 10?F-35V |
C2, C3, C5...C8 |
1A0K |
6 |
ELCO AXIAL 1?F-63V |
C4 |
SI100N0 |
1 |
SIBATIT 100nF-63V |
IC1 |
TL072 |
1 |
TL072CP DUAL BI-FET OPAMP LOW NOISE |
R1, R2 |
RA22K0 |
2 |
RESISTOR 1/4W 22K |
R3, R4 |
RA1M0 |
2 |
RESISTOR 1/4W 1M |
R5, R6 |
RA10K0 |
2 |
RESISTOR 1/4W 10K |
RV1, RV2 |
K001SV |
2 |
PIHER TRIM 1K SMALL VERT |
IC1 |
8P |
1 |
8P DIL IC SOCKET 300MIL |
MANUAL |
H2572 |
1 |
MANUAL K2572 |
PCB |
P2572 |
1 |
PCB K2572 |
PCB CONNECTOR |
PC3P10 |
1 |
PC BOARD 3.96 PCB 10 CONT. (PEC 10K00) |
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