Caiman Mods

[StanleyB]

The two yellow caps are part of the Caiman PCB. They are not on the TC-7520 PCB.

[toad]

for the line out caps, what are the BG equivalents....?

the 47uF 6.3V NX Hi-Q or something rated higher...?

anyone...?

[Shanedudddy2]

Did the change of the regulators, pretty big difference imo =)
now for the op-amp bypass lol sound like I`m doing surgery :P...hmm i guess I am haha

[StanleyB]

Take note that if you bypass the line output opamp, you'll get a lot more sampling noise breaking through.
You'll also have a lot more problems with audio cable selection. The opamp acts as a buffer and impedance matching circuit. When you bypass it, the load is placed on the DAC chip, which is not designed to act as a buffer and impedance matching network. The DAC chip output impedance is 10K loaded. The opamp output is less than 1K.

[Shanedudddy2]

u mean the DC offset or something else?

[Shanedudddy2]

I have no use for my Opamp board since doing my change, anyone want to buy it off me so they could mod it and do changes and switch the board in and out easily to test things?

[therockst4r]

How big a difference was the opamp bypass in your opinion?

[Shanedudddy2]

Was a pretty decent upgrade in my books. Bass was the noticeable effect. Bass with opamps seems too be either bloated, tuneless or just plain not there. The revival of the Bass was the big thing for me, as well as improvement of all other areas, will put in some higher quality bypass caps in later and see how that sounds in comparison later on

[Shanedudddy2]

Also wondering what would be the lowest capacitance value to use to prevent DC offset from the DAC? As smaller valued capacitors are cheaper

[FarmBoy (DaveK yet again!)]

I have no use for my Opamp board since doing my change, anyone want to buy it off me so they could mod it and do changes and switch the board in and out easily to test things?

Hi Shane,
Please PM me with a price for the op-amp board - no commitment either way.
Dave.