Quick check RE: Murata regulator replacement for Caiman?

[paul_cz]

... some images illustrating last night's work. Cherrs, cz

[Gazjam]

Fitted the Dexa's myself and very happy to see the back of that annoying background noise

Dont know about temps or anything, but MartinT has been running the Dexa's for some time now without any heatsink.
Good question about the R1 wire link, I've removed the resistor in my Dac and the regs seem to work fine?
Would it better with a resistor in there...dunno.

I'd be interested in other Dexa reg users and if found the regs sound changed over time. My experience (using my lug'oles) is that most electronic components DO show change over time from new.

Just wondering about these Dexa's...

[paul_cz]

Hi! I can report that the Caiman and the Dexas are still fine. They get hot but this seems to be a local phenomenon. Even with closed lid the top surface of the Caiman stays cool.
Think the Dexas settled down already. Sound in passive mode (Rubycon Bi-polars from Tirna) is good, very open, stable with sweet tops. Will stay passive for a while ...

[Reid Malenfant]

Good question about the R1 wire link, I've removed the resistor in my Dac and the regs seem to work fine?
Would it better with a resistor in there...dunno.

Absolutely not, keep the wire link

I'm not 100% sure on this but the resistor is probably used to drop some voltage to the standard voltage regulator so it doesn't get too warm?

While it will certainly help in that respect, with any varying current drawn the input voltage to the regulator (with the resistor) will rise & fall according to the current drawn by the circuit. The regulator, or any regulator for that matter will have a far easier time (& produce a vastly more stable output) with the resistor replaced with a link wire.

As you are using a nice dedicated regulated PSU to power the Caiman it seems like a waste of time to bugger up that regulation by fitting the resistor again

[Gazjam]

sounds good to me Mark, always happy not having to do any more work!

thanks.
Gary.

[HighFidelityGuy]

Ok, you've convinced me to Mark. I'll stick with the wire link and my custom heatsinks.

[maniac]

Status report: Muratas replaced with Dexas and viola - no more background hiss. Finally! My thanks goes to to aos members.

First impression is that sound is considerably bass lighter than with Muratas , maybe with overall lest punch. Will let it burn in for some time to reconsider. Also i'll possibly try to replace fuse with HiFiTuning T2,5A one I have spare now at the moment.

iMac -> toslink -> Gatorized Caiman with Elna caps mod, Dexas and Gator HD800 bass mod -> HD800

[MartinT]

Bass lighter sound often indicates cleaning up of the signal path. Give them more time to burn in.

[Canetoad]

I have the same mods to my Caiman and the bass reproduction in my system is superb.

[Gazjam]

same here.

The Dexa's offer better resolution, soundstage and yes...bass.
It'll come back, nae worries.