Do
not put the PHONO Connect to the antique furnishings turntable, Most of
them are no turntable Ground and the internal has a PHONO amplifier. As
well as the previous combination of audio inside the PHONO and the
carbon core pin of the special turntable to use.
Note
:The board is two-stage voltage amplification, One-Stage magnification
47, According to your needs, you can adjust the gain, if you think the
magnification is too large, you can put 6-7 feet between the resistance
47K to 4K7 Below (or direct short-circuit 6-7 feet can also)(finshed
board no need to change)
there are two op-amp version can be choose：
version 1 ：with NE5532
version 2： with 49720NA
Product Material:
1.Use
NOVER' audio dedicated capacitor to do the filter, the human voice is
very good, the effect is better than the general low-end capacitor
filter array
2.Resistance
for the United States DALE or VIS resistance, the output capacitor for
the German ERO, decoupling with red WIMA and ELNA brown god and other
senior resistance
3. PCB for the double-sided gold-immersed process, line alignment 1Point ground.
PCB size: 110X46MM
Supply voltage: AC12VX2 to AC20VX2 Wide range
Op amp selection: NE5532 low-frequency thick warm, more classic, 49720NA, delicate, good human voice, excellent positioning
Packing list：
finished amplifier board 1pcs .