Caiman passive output mod revealed

[StanleyB]

Unfortunately I don't have my camera at present. I assumed you would know what I was talking about.

Do you realize that the TC-7510 had 8 revisions? Not all of them have the same connections, and I am terrible when it comes to remembering every link on them...

But yes, thus links are the ones.

[Puffin]

Thats OK. I have found this which may not come up that well. I could email it to and then you may be able to enlarge it. The pic shows the right hand jumper. There is another one just to it's left next to the left ribbon cable.



So do I connect L to one set of links and R to the other OR
use both holes/areas on the R jumper for L&R?

[StanleyB]

Just go by the picture above it, which shows the two links between the ribbon cables.

But why have you not done the wire mods yet? You don't have to solder to the IC pins directly like I did.

[Ali Tait]

To which wire mods do you refer please Stan?

[Puffin]

Sorry, but I am really thick. The picture shows one jumperover two holes. Do I just use this for L & R, or when you say

Just go by the picture above it, which shows the two links between the ribbon cables.

do you mean I remove the jumper that can't be seen in the pic as well?

[StanleyB]

Just solder the 47uF cap from each of the links to the cut pin on the fixed RAC output. No need to remove the pins.

[Puffin]

Aaah I see. Excellent. I ought to compile a guide for idiots!

[Puffin]

HFG. Sorry I missed your post. Yes, that was what I was referring to.

StanB. I have done the mod but it clearly doesn't like the impedance of my Pre-Amp. I remember I read somewhere that the impedance had to be a certain Ohmage. Can you let me know and I can some resistors tied to Grd. Thanks.

Rob.

[StanleyB]

Both Wlfson and TI recommend 10K between the RCA connector and ground. It's a starting point for the PCM1716. But without the wire mod on the TC-7510 you are not loading the analogue stage in the DAC chip correctly.

[HighFidelityGuy]

HFG. Sorry I missed your post. Yes, that was what I was referring to.

No probs.

Both Wlfson and TI recommend 10K between the RCA connector and ground. It's a starting point for the PCM1716. But without the wire mod on the TC-7510 you are not loading the analogue stage in the DAC chip correctly.

So is this 10k resistor not required in the Caiman for this passive output mod? I'm assuming it's not as you didn't mention it in the guide but I thought I better double check.

Thanks.