Mod your Beresford 7520

[leo]

BTW you'll be struggling to find a cap higher in voltage same uf which would physically fit properly in the case
Next up from 16v would probably be 25v

[StanleyB]

You would also have to change all the caps on the top PCB. I got a test unit where all the caps are 25V but the top case can't close.

Stan

[HighFidelityGuy]

I think you're probably right, especially seen as Stan had to get his made specially.
I think I saw some 20V and 25V on Farnell in varying sizes but I didn't bother checking the specific sizes as I wanted to find out if it was worth getting a higher voltage one first.

[leo]

Hmm, I see. So fitting a Murata SR isn't a sure fire way to getting better sound quality. Have you tried one of the Murata SR's or anything similar yet?

Thanks.

Exactly, its suck it and see of course you may get a surprise .

Not tried the Murata, only alternative regs I've tried so far in this particular dac are diy discrete jobs built on vero

[HighFidelityGuy]

You would also have to change all the caps on the top PCB. I got a test unit where all the caps are 25V but the top case can't close.

Stan

Thanks Stan.

Hmm, so if we want to use the Murata 7812SR it's a case of either running all the caps close to their limits or swapping all the caps. I'll give that some thought, thanks.

[HighFidelityGuy]

Somebody mentioned a while ago that running their 7520 off 13.5V made the sound more harsh. Was this due to the type of power supply being used or the voltage?

I know we've already established that linear PSU's can't keep the big cap topped up quickly enough but I can't remember what the symptom of this was.

So was the harshness caused by a linear PSU being used?

[FireFly]

@HighFidelityGuy

switcher is last thing you want inside DAC

[lingling1337]

Anyone wanna recommend some good practice for SMD so I can get to replacing my DAC with the WM8716?

[HighFidelityGuy]

@HighFidelityGuy

switcher is last thing you want inside DAC

Sorry, I don't follow?

[freddiecas]

Sorry, I don't follow?

If I'm allowed to jump in Firefly is making an important point that class D or switching supplies operate at high frequencies, and need adequate filtering on the output to get rid of the noise and spikes that occur. Oversampling DACs also work at high frequencies and need filtering to remove the hash from the analogue outs. If the two are in the same case (or even if not) the layout and screening needs to work down beyond the microvolt level to make sure the one does not intermodulate the other and cause errors in the digital signal or noise spikes in the analogue signal. They are after all both micro radio transmitters