I'm about to attempt some upgrades to my old Yamaha CDX-550 cd player. I know, it's not the best thing to start with (the tray mechanism is a flimsy piece of plastic, for example) but since it is available, I might as well see what I can do with it.
I don't have a service manual, but there are two 4570 dual op-amps labelled "LCH" and "RCH" which I'm guessing are I/V converters and / or output buffers. There is also one BA15218 op-amp in the output section.
Anyone have any suggestions on replacements for these? Would the OPA132 be a good replacement for the 4570's?
Here are some specs on the 4570:
4.5nV/rtHz noise
7V/uS slew rate
15MHz GBW
100dB CMRR
And for the BA15218:
1.0uV rms noise
3V/uS slew
10MHz GBW
90dB CMRR
single supply operation (not sure if it's being used with single or dual supplies - I will measure and find out).
I don't have a service manual, but there are two 4570 dual op-amps labelled "LCH" and "RCH" which I'm guessing are I/V converters and / or output buffers. There is also one BA15218 op-amp in the output section.
Anyone have any suggestions on replacements for these? Would the OPA132 be a good replacement for the 4570's?
Here are some specs on the 4570:
4.5nV/rtHz noise
7V/uS slew rate
15MHz GBW
100dB CMRR
And for the BA15218:
1.0uV rms noise
3V/uS slew
10MHz GBW
90dB CMRR
single supply operation (not sure if it's being used with single or dual supplies - I will measure and find out).