This telephone-amplifier can be used either as an independent amplifier with loudspeaker, for instance to follow a telephone-conversation, or one can connect it's output to an amplifier or a mixing-panel (e.g. radio-stations).
Technical Specifications:
� Input : separation-transformer coupling.
� Output :
� loudspeaker:0.5W/8 Ohm
� line: 0dB (0.775VRMS)
� Power supply: 7 to 9 VAC or 9 to 12 VDC (*) max. 50mA.
� (*) For building it into the mixing-panel, the possibility to connect the module to 15V exists as well.
Parts List:
| Label |
Reference |
Qty |
Description |
| C1 |
1J0J |
1 |
ELCO PCB 1�F-50V |
| C1,C2 |
1MK22 |
2 |
MKH 0.022�F-400V |
| C10 |
470J0C |
1 |
ELCO PCB 470�F-16V |
| C3 |
C18N0 |
1 |
18nF CERAMIC CAPACITOR |
| C4,C5 |
C47N0 |
2 |
47nF CERAMIC CAPACITOR |
| C6 |
SI100N0 |
1 |
SIBATIT 100nF-63V |
| C8 |
47J0C |
1 |
ELCO PCB 47�F-16V |
| C9 |
100J0C |
1 |
ELCO PCB 100�F-16V |
| D1, D2 |
1N4148 |
2 |
1N4148 (1N914) |
| D3, D4 |
1N4007 |
2 |
1N4007 DIODE 1A-1000V |
| IC1 |
LM386 |
1 |
LM386 AUDIO AMPLIFIER IC |
| R1...R3 |
RA10K0 |
3 |
RESISTOR 1/4W 10K |
| R4, R5 |
RA1K0 |
2 |
RESISTOR 1/4W 1K |
| R6 |
RA10E0 |
1 |
RESISTOR 1/4W 10E |
| R7 |
RA3K3 |
1 |
RESISTOR 1/4W 3K3 |
| R8 |
RA560E0 |
1 |
RESISTOR 1/4W 560E |
| RV1 |
K010LV |
1 |
PIHER TRIM 10K LARGE VERT |
| TRANSFO |
LT44 |
1 |
LT44 IMPEDANCETRANSFO 20KPRIM/1K SEC |
| 8P |
8P |
1 |
8P DIL IC SOCKET 300MIL |
| AXE |
AXE |
1 |
AXE 19mm FOR PIHER PT15 |
| DBL |
DBL |
1 |
JUMPER |
| H4900 |
H4900 |
1 |
MANUAL |
| P4900 |
P4900 |
1 |
PCB |
| PRINTPZ |
PRINTPZ |
1 |
10 PCB TABS |
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