[and now for something completely different part 3]

On 7/4/2018 at 10:22 PM, Pars said:

Documentation? heh

Which amp? This is a confusing thread because there are at least 3 amps discussed here, maybe more (Kevin or others, correct me if I am wrong):

1. CFA2 (CFP) - current feedback amp. Each board does 1 channel SE, so 2 for stereo SE, 4 for stereo balanced. Kevin later did a mod to this adding current mirrors feeding the servo. People who had built the original noticed that the servo was audible as to quality of opamp. The schematic in Kevin's archive is the older version.
2. CFA3 - current feedback amp for balanced. Not sure if anyone ran boards for this one. Basically a pair of CFA2 amps and ubal-bal board on one pcb. Schematic does not show the current mirror mod as in 1 above
3. uberamp - seems to be a power amp; I've never quite figured this one out

Here are the schematics for the CFA2 (current mirror version), and the CFA3. I also attached my BOM for a CFA2. Amp quantity shown is for stereo SE. If going balanced, double it. It should reflect the later current mirror version. You'll also need some GRLVs or other power supplies, etc.

cfa2cmirror.pdf

cfa3production.PDF

CFP2_BOM_update2018march.xlsx

EDIT: I also ran across another schematic on Kevin's site which I hadn't seen before: currentsourceamp2.PDF. This seems very similar to the cfa2cmirror schematic, but is described as a transconductance amp.

Thanks very much for this. 

Is Kevin's site still active? If so could you post the link? All the old links are not working for me. Thanks again.

[and now for something completely different part 3]

Hi,

Could someone please direct me to the documentation for this amp? (schematic/bom etc)

Thanks!

[2018 PCB Group Buy with TKD pots]

Added my name for some CFA and GRLV boards, thanks.