Caiman PSU

[Covenant]

The TC-7520 needs certain mods done to it in order to work with the Caiman PSU properly. I have agreed with Audio Flair that they can do the mods and include the Caiman PSU. That won't be before end of November though.

I have to say I am utterly pissed off about this.

[StanleyB]

It's an electrical safety issue. Some parts in the TC-7520 are not designed to take the increased voltage and current without overheating and possibly failing.

[NickB]

Hi Jerry

"I have to say I am utterly pissed off about this."

Why???

Nick

[Gazjam]

Dont know if its relevent here, but my 7520 runs just fine (great actually) at 15v.
Doesn't even warm up.

Maybe the extra 0.5v with the proper Caiman supply makes a difference I dont know.
No doubt Im unaware of a lot of things?

The only factor I can think of as being relevent (in terms of electrical/thermal stress on components) is the ammount of volts hitting the Dac from the PSU.

But hey - what do I know, right?

[Labarum]

Dont know if its relevant here, but my 7520 runs just fine (great actually) at 15v.

I should be very careful, Gaz. If Stan says there is a safety issue (and he has said it twice), I would go back to 12v.

[chrism]

Hi Gaz,

I am learning too but my thoughts are:

It may be that although the new PS can supply 15v the Caiman only draw what it needs from it, basically like a reservoir. To work in this way it would need to have some form of internal tracking regulation (I think Stan may have called it a virtual circuit in a past note?).

It may be that this regulation differs in the Caiman and 7520 models and if so it would be best to check with Stan before going for it.

Just my thoughts.

Regards

Chris

[ZebuTheOxen]

I was going to ask if the work would be something that could be done by an individual, but I don't fancy touching power regulation even if it was.

I'll be interested in pricing when it's all ready to go :]

[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.

[Covenant]

Hi Jerry

"I have to say I am utterly pissed off about this."

Why???

Nick

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.

[Gazjam]

That was my understanding , yes.

(Quite happy to discuss in PM)