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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??:scratch:
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
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
That's why I didn't chance it myself.Quote:
Originally Posted by leo
I'll post my findings as soon as I get the listening done.
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?Quote:
Originally Posted by leo
Also what do ppl think about a linear PSU like this one;
http://www.maplin.co.uk/Module.aspx?...C=SO&U=strat15
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 .Quote:
Originally Posted by ultraviolet
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:lol: 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:eyebrows:
Quote:
Originally Posted by ultraviolet
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
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.
These guys have a number of 47uF BG's listed:
http://www.partsconnexion.com/catalo...ctrolytic.html
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 tasteQuote:
Originally Posted by ultraviolet
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