New/upgraded TC-7520 power supply?

**StanleyB** · 02-07-2009, 14:17

It's likely to be. I spent some time looking at this and I couldn't get a better performance from it. The TC-7520 PSU can charge up that massive 10,000uF cap inside the TC-7520 case far faster than any linear PSU out there.
If you really want to improve on the TC-7520 PSU you could start by replacing the regulators with some of the Murata SR versions.

Stan

**webby** · 02-07-2009, 14:19

I'd still like to know if anyone has used USB repeaters for lengths over 5m....

**Covenant** · 02-07-2009, 15:23

Originally Posted by Sensimilia

It's likely to be. I spent some time looking at this and I couldn't get a better performance from it. The TC-7520 PSU can charge up that massive 10,000uF cap inside the TC-7520 case far faster than any linear PSU out there.
If you really want to improve on the TC-7520 PSU you could start by replacing the regulators with some of the Murata SR versions.

Stan

Are the Maruta's going in the Cayman Stan?

**Clive** · 02-07-2009, 15:27

Originally Posted by webby

I'd still like to know if anyone has used USB repeaters for lengths over 5m....

Yes I have used one and it works fine, whether it degrades the sound is another matter but there are no strange noises.

**StanleyB** · 02-07-2009, 15:35

Originally Posted by Covenant

Are the Maruta's going in the Cayman Stan?

I can't afford them!

**trailer** · 02-07-2009, 18:15

Good job I kept the Maplin PSU then

**lovejoy** · 03-07-2009, 17:32

I've been playing again...

Regular readers will know that I run my 7520 off a 'teddyreg' regulator circuit powered by a toroidal transformer which I think works very well..

Well, the thought occurred to me earlier - "If I have very nicely regulated 12Volts coming into the 7520, why do I need a reservoir cap in the internal power supply?"

So just to be on the safe side, I thought I'd try it first in my old 7510 as a test bed. I just removed the reservoir caps and powered up as usual. No smoke, no nasty noises - good start.

That was 3 hours ago and was only meant as a quick test. It's made quite an improvement to the 7510 - Dynamics have gone through the roof. Drums now have a REAL kick to them, but it's also amazingly tight and controlled. Cymbals are sweeter and there's loads more air around everything. It's now digging way down into the recording and pulling out the best from even the poorest recordings.

It has been one of those afternoons of lots of grinning. I should go and try the same trick on the 7520, but I'm enjoying the 7510 way too much to bother for the time being ;-).

**chrism** · 03-07-2009, 19:02

Hi,

Just wondering when you removed the caps how did you complete the circuit? I have a Maplins 13.8v 5 amp supply but justs a bit scared to try it without the 10,000 cap I have added into my 7510.

Regards

Chris

**leo** · 03-07-2009, 19:20

If the Maplins 13.8v one is a SMPS I seriously would not recommend removing the big caps on the DC input, if its a linear it may be worth a try, linears will struggle keeping the big caps charged as well as a stiff SMPS, its one of the reasons a Switcher works better with these dacs (as they are)

**chrism** · 03-07-2009, 19:23

Hi Leo,

It is the linear one - a bench supply (13.8v 5a) with a cheap trafo and simple regulator in it. Sounds way better than any switching one I have tried to date. So, shall I whip out the 10,000 cap and have a go?

Regards

Chris

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