Just got BrianGT's kit, and have a few questions:
On the amp board:
1) Would it be better to put R2 (signal to ground) before R1 (switch the positions)? Also, should the value of R2 be 10x of the value of the pot before it (i.e., 10k pot with 100k R2, followed by the original 1k R1)?
2) Would it be a good idea to put a 10000uf TS-UP +a 100uf FC + a 15uf Tantalum + a 0.1uf Film on each rail next to the chip. The TS-UP will further take care of ripple (after the 10000uf ones in the power supply section), the FC will charge faster, the tan will absorb low frequency variations (suggested by the datasheet), and the film will do the high frequency. --- I just have extra 10000uf TS-UP and 15uf Tans laying around.
3) Mute -- does this function degrade sound in any way? If it does, to disable it, would a 1/8w 10k resistor between Pin 8 and ground be enough (or will it get burned)?
4) The feedback caps Cm -- what is the lowest voltage requirement for those? I have 25v 47uf Silmic II laying around.
Many Thanks!
On the amp board:
1) Would it be better to put R2 (signal to ground) before R1 (switch the positions)? Also, should the value of R2 be 10x of the value of the pot before it (i.e., 10k pot with 100k R2, followed by the original 1k R1)?
2) Would it be a good idea to put a 10000uf TS-UP +a 100uf FC + a 15uf Tantalum + a 0.1uf Film on each rail next to the chip. The TS-UP will further take care of ripple (after the 10000uf ones in the power supply section), the FC will charge faster, the tan will absorb low frequency variations (suggested by the datasheet), and the film will do the high frequency. --- I just have extra 10000uf TS-UP and 15uf Tans laying around.
3) Mute -- does this function degrade sound in any way? If it does, to disable it, would a 1/8w 10k resistor between Pin 8 and ground be enough (or will it get burned)?
4) The feedback caps Cm -- what is the lowest voltage requirement for those? I have 25v 47uf Silmic II laying around.
Many Thanks!
Cm is 100µf/50V
Ci is 47µf/50v
for the minimum rails voltage
tell us which toroids (18v,22v or 25v)you use and which speakers (4ohms or 8ohms )
http://www.chipamp.com/docs/lm3886-manual.pdf
Ci is 47µf/50v
for the minimum rails voltage
tell us which toroids (18v,22v or 25v)you use and which speakers (4ohms or 8ohms )
http://www.chipamp.com/docs/lm3886-manual.pdf
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