Mod your Beresford TC-7510

[kalozois100]

After a bit of conversation with Stan and viewing posts on here I decided to get the op amp changed out along with the capacitors for some Black Gates. The DAC has been replaced with the recommended Wolfson one. Total cost for the parts about twenty quid.


how do you change the dac chip in the tc7510 for a wolfson one? and where can you get your hands on a wolfson chip??

[leo]

http://uk.farnell.com/wolfson-microe...questid=404139

Changing the dac should only be done if your very confident , it would be easy to screw the thing up.
Some mods are ok for beginners, this is NOT one of them IMHO

You'd be best off asking somebody which has tried this mod to see if it brings a worthwhile improvement

A search on google http://www.head-fi.org/forums/f7/wha...5/#post4234581

[leo]

Mod21

47uf caps, plenty of choices

Standard cheap types

http://uk.farnell.com/panasonic/eca1...50v/dp/9693785

Cheapish Audiophile types

http://uk.farnell.com/panasonic/eca1...50v/dp/8767408

Blackgate, various grades

http://www.hificollective.co.uk/comp...gate_caps.html

Elna Cerafine and Silmics

http://www.hificollective.co.uk/comp...apacitors.html


Mod21 part2

Lm4562

http://uk.farnell.com/national-semic...-so/dp/1685365

Choices of 220pf filter

Polypropylene
http://uk.farnell.com/wima/fkp2-220p...00v/dp/1005983

polystyrene
http://uk.farnell.com/lcr-components...60v/dp/9520031

Mica
http://uk.farnell.com/cornell-dubili...00v/dp/1264884

[trailer]

http://uk.farnell.com/wolfson-microe...questid=404139

Changing the dac should only be done if your very confident , it would be easy to screw the thing up.
Some mods are ok for beginners, this is NOT one of them IMHO

You'd be best off asking somebody which has tried this mod to see if it brings a worthwhile improvement

That's why I didn't chance it myself.

I'll post my findings as soon as I get the listening done.

[ultraviolet]

Mod21

47uf caps, plenty of choices


Blackgate, various grades

http://www.hificollective.co.uk/comp...gate_caps.html

I can't find blackgate 47u anywhere, I suspect stocks have finally run out. Which would you rate as a second best? Cerafine or Silmic?


Also what do ppl think about a linear PSU like this one;

http://www.maplin.co.uk/Module.aspx?...C=SO&U=strat15

[leo]

I can't find blackgate 47u anywhere, I suspect stocks have finally run out. Which would you rate as a second best? Cerafine or Silmic?

In all honesty mate I'm personally not a huge fan of BG caps be it N, NX, NX Hi-Q, FK etc, they all add a particular signature to the sound which to me sounds like heavy colouration .
This is not to have a pop at BG's, people love what they do and thats fine I have used BG's in some apps before though to add a bit of flavour if I feel its needed.

The Elna's are also similar regarding having a particular signature, especially the Silmics , the audiograde caps use different internal materials like hemp, graphite etc which affects the sound.

Anyway enough blabbering I wouldn't rate Silmic better than Cerafine or vice versa, they do sound different, Silmics tend to have a more smooth presentation, Cerafines a bit more forward

You could be boring and just buy general purpose electrolytics, sorry for the s**t reply, hopefully somebody else can say which they like better

[leo]

Also what do ppl think about a linear PSU like this one;

http://www.maplin.co.uk/Module.aspx?...C=SO&U=strat15

Never tried it personally but if the voltage out is suitable it should be pretty decent, certainly hefty and probably be much better than a SMPS.
Main thing with some transformer based linears which are cheap is that you can sometimes get ones which suffer from mechanical hum/buzzing

[ultraviolet]

Thats a good reply! I've done MOD21 including op-amp at no cost and I've got a free 7 Ah battery tomorrow from work if I remember to pick it up. I was wondering about actually spending some cash now on some caps but I might buy a CD instead now.

I'm a bit cheesed off with myself as I cleared out the garage a bit before Christmas and chucked out a CB power supply 'cos it was a bit tatty and the power transistor had blown. I need about 13.5 V to charge the battery.

[NRG]

These guys have a number of 47uF BG's listed:

http://www.partsconnexion.com/catalo...ctrolytic.html

[leo]

Thats a good reply! I've done MOD21 including op-amp at no cost and I've got a free 7 Ah battery tomorrow from work if I remember to pick it up. I was wondering about actually spending some cash now on some caps but I might buy a CD instead now.

I'm a bit cheesed off with myself as I cleared out the garage a bit before Christmas and chucked out a CB power supply 'cos it was a bit tatty and the power transistor had blown. I need about 13.5 V to charge the battery.

If you notice Stan seems to use general purpose caps for the mod21, how about trying a couple of cheapies and then you can try more exotic parts later for tuning to personal taste

I used something similar to this for charging a 12v 7aH Yuasa battery which is used in the cheapo diy Nosdac http://cgi.ebay.co.uk/500mA-charger-...1%7C240%3A1318