Caiman PSU

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Originally Posted by StanleyB

I am meeting Adrian from Audio Flair this evening at the MAD AoS dinner. One of the options we are looking at is to install a couple of other mods at the same time that would raise the TC-7520 above the basic Caiman specification for those who still have their THS4032 or LM4562HA.
I am running one of those extra mods in a Caiman with the THS4032, and so is Leo.
I hope to also try it on the TC-7510 and if the results are worthwhile, I'll off it to Audio Flair to carry out for those interested. If I don't mention the results, then they weren't worthwhile:).

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Will await the results of this with interest!

MAD AOS dinner...as in whacky, zany etc? ;)

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Originally Posted by ZebuTheOxen

I've got a 'Caiman' 7520 (WM8716 / 4562NAs / 10uF caps + 36k resistors).

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10uF???? That's incorrect. Where did you get that information from?

Whatever the standard MCL 5 / 6 caps are.

I've just snipped, lifted the leg and soldered the 36k into series with it.

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Originally Posted by ZebuTheOxen

Whatever the standard MCL 5 / 6 caps are.

I've just snipped, lifted the leg and soldered the 36k into series with it.

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You need to swap the cap for a 100nF, the original one is 100uF I think:

http://i273.photobucket.com/albums/j...ms/stanmod.jpg

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Originally Posted by Covenant

Because we were assured that the only differences between the 7520 and Caiman were the Wolfson chip and the op-amps. Gaz will confirm this.

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I can't remember Stan ever saying that. :scratch: He said they were the main differences along with the MLC5/6 mods.

If you read this post HERE you will see that Stan states (2 months ago) that he can't remember what other changes were made off the top of his head. So from that you can assume that other changes were made.

I'm sure I can also remember Stan saying that performing those main mods would bring the 7520 "close" to the performance of the Caiman. I'm sure "close" was the word he used. :)

Well,
I didnt want to highlight this aspect of the Dac in an open forum, or indeed my thoughts/info on it, but you feel free..
Not everythings publicly announced you know.

Anyways....moving on?
Gaz.

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Originally Posted by HighFidelityGuy

I can't remember Stan ever saying that. :scratch: He said they were the main differences along with the MLC5/6 mods.

If you read this post HERE you will see that Stan states (2 months ago) that he can't remember what other changes were made off the top of his head. So from that you can assume that other changes were made.

I'm sure I can also remember Stan saying that performing those main mods would bring the 7520 "close" to the performance of the Caiman. I'm sure "close" was the word he used. :)

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The standard caps fitted in the 7520 MLC5 and MLC6 positions are 100 pico farad ceramics (going by memory)
For Stans mod it needs to be 100 nano farads or 100,000 pico farads (0.1uf) to go in series with a 36k resistor, 10 micro farads (10uf) is way too large

Ceramic and film caps are usually marked, 101 is 100pf and 104 is 100nf

I edited post in sticky collection of mods in the diy room, just added a bit of text .

Ok , back to Caiman psu :)

Leo could you just confirm what this latest mod does?

I'm putting my money on power regulation, probably using Murata regs. :eyebrows: At least I hope that's what it is as I've been interested in trying this for a while.